Abstract Book92-9-12

International Association
for Dental Research
Iranian Division of IADR
IADR
www.iadr-iran.com
11-13 Dec 2013 Olympic Hotel -Tehran-Iran
WHO Collaborating Center for
Training and Research in
Dental Public Health, Tehran, I.R. Iran
Dorsunteb Pars
Abstract
Book

9th
Iranian
& 13th
Kuwaiti
Divisions of IADR
Joint Congress
Abstract Book

9th
Iranian & 13th
Kuwaiti Divisions of IADR Joint Congress, 11-13 Dec 2013 - Abstract Book

5
Index
Organizing Committee Messages .........................................................10
Organizing Committee.................................................................................16
Iranian IADR Officers....................................................................................17
Scientific Committee & Abstract Reviewers....................................17
Sessions Chairs................................................................................................18
Featured Presentations...............................................................................19
Workshops.........................................................................................................27
IADR-WHO Symposium...............................................................................38
Oral & Poster Presentation ......................................................................41
Abstracts in order of ID numbers
H. BAGHERI G
Biomimetic Synthetic Enamel: A Potential Remineralizing Agent for Enamel Repair............................42
M. BONABI
Adherence of Iranian Dentists to Information Technology...........................................................43
A. BAGHALIAN
Fracture Resistance of Posts in Full-Coverage Restorations of Primary Incisors..................................44
A. KESHVAD
Human and Animal Bone Substitutes for Augmentation before Implant Placement............................45
A. PARHIZ
Bone Debris vs. Allografts in Repairing Implant Buccal Bone Dehiscence.........................................46
O. MOGHADDAS
Role of Titanium Mesh in Reconstruction of Ridge Deficiencies....................................................47
F. FARSHCHI
Reverse Contrast Digital Radiography in Root Fracture Diagnosis..................................................48
9th
Iranian
& 13th
Kuwaiti
Divisions of IADR
Joint Congress
Abstract Book

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Iranian & 13th
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N. NOURBAKHSH
The Effect of OTC Bleaching Products on Enamel Microhardness..................................................49
F. FARAJI
Effect of GC Tooth Mousse and MI Paste Plus on Dental Plaque Acidity...........................................50
A. DARNAHAL
Porcelain Laminate Fracture Resistance on Incisal Reduction less than 2mm....................................51
D. NIKNAM
Effect of Fluoride and Chlorhexidine Varnishes on Interproximal Plaque pH.....................................52
A. NAJAFPOUR
The Role of HIV Infection on Oral Pigmentation.......................................................................53
H.-. MOOSAVI
Clinical Effectiveness of Laser on Postoperative Hypersensitivity...................................................54
T. HOOSHMAND
Degree of Conversion of Low-Shrinkage Composites Photo-Activated by LED and Halogen...................55
E. JAFARPOUR
Investigation of Implant Width on Distribution of Stress in Adjacent Bone.......................................56
F. NILCHIAN
Quality Assessment of the Information Related to Fissure Sealant.................................................57
S. ALIREZAEI
Formulation of New Mucoadhesive Containing Phenytoin on Wound Healing..................................58
N. MOHAMMADZADEH AKHLAGHI
Residual Root Thickness Evaluation after Pre-Flaring Using Gates Glidden Drills................................59
S. SADEGHI
Effects of bonding agent and sealant viscosity on sealant microleakage.........................................60
A. MESGARANI
Accuracy of Two Radiographic Methods in Diagnosis of Root Resorption........................................61
N. RAHSHENAS
Relationship between Art (Painting) with Stress, Anxiety, Depression in Dentists...............................62
H. RAHIMI
Effect of Stress on Salivary Ion Content in Orthodontic Patients....................................................63
A. PAHLEVAN
SEM Evaluation of Intracanal Dentin Changes in Endodontically Treated Teeth: ................................64
S. AZADNIA
A Biocompatibility Comparison of Nanosilver Coated Gutta-Percha and Standard Gutta-Percha.............65
L. RANJBAR OMRANI
Internal Evaluation of Operative Dentistry Department of Tehran University....................................66
S. KHAZAEI
Effects of Different Prosthesis Materials on Stress Distribution of Implant.......................................67
S. ASEFI
Introduction of Iranian 3D Dental Cast Simulator.....................................................................68
A. PAKFETRAT
Removal of Refractory Erosive Lichen Planus by CO2 Laser .........................................................69
A. SEDIGH NIA
Comparison Of Apically Extruded Debris Between Hero And Race Systems......................................70
R. HAMEDI
The Effect of Bone Metabolic Alterations on Orthodontic Tooth Movement.....................................71
M. ABBASI
Coronal Leackage Of Gutta-percha Or Resilon Using An Intraorifice Barrier......................................72
M. MINA
Mathematical Beta Function for Maxillary Arch Form Prediction...................................................73
H. YOUSEFI
Interleukin-10 Gene Polymorphisms in Patients with Recurrent Aphthous Stomatitis.........................74

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M. NEJADKARIM
Stress Distribution at the Internal Surface of Dental Implants......................................................75
N. MOHEBBIAN
Debonding of Ceramic Brackets Using Er-YAG Laser...................................................................76
J. ORANGI
Enhance Socket Preservation with Combination of Bio-Oss with Silk .............................................77
L. KHEIRI
The Osteoregenerative Effects of PDGF-BB with MSCs Loaded on FDBA..........................................78
S.R. HABIB ABADI
Implant Location Influence on Stress Distribution in Implant Assisted RPDs.....................................79
S. SEYEDZADEH SABOUNCHI
Search for Evidence Behavior among Dental Faculty Members in Iran............................................80
A. ALBUJEER
HIV/AIDS Awareness Among Iraqi Medical and Dental Students...................................................81
A. EBN AHMADY
Designing an Oral Health Surveillance System in Iran.................................................................82
S. SHAHRABI FARD
Evaluation of Zirconia Post and Zirconia Coated FRC Post............................................................83
S. ARAGHI
PH Changes of Intracanal Materials in Simulated Root Surface Defects...........................................84
G. NAHVI
Apical Transportation of Waveone File with Full-Rotation versus Reciprocation Movement..................85
M.T. BAGHANI
Mesenchymal Stem Cells Delivery in Maxillofacial Bone Regeneration: Systematic Review...................86
M. SHABANI
Laser Assisted Monitoring of Dental Caries in Early Childhood Caries Prevention...............................87
S.S. HASHEMI KAMANGAR
Effect of Bleaching on the Microhardness and Color of Composites...............................................88
S. ETEHADIEH KOOCHAK
The Effect of Firing on Marginal Integrity of Zirconia Core...........................................................89
N.S. MATINI
Invisible Dental Injuries (Cracks) due to General Anesthesia Intubation..........................................90
B. TAHANI
Attitude and Practice of Dentists regarding Tobacco Cessation in Iran.............................................91
B. DADRESANFAR
Effectiveness of Reciproc and iRace on Canal Wall Cleanliness (SEM).............................................92
A. AHADI
Histocompatibility and Setting Time of Endodontic Cement........................................................93
A. ZIADLOU
Endodontic Cements Influence on Odontogenic Differentiation of Pulp Stem Cells.............................94
M. MOJAHEDI
Laser Assisted Pain Reduction after Vital Pulp Therapy...............................................................95
M. GHASEMI
Association of Periodontal Condition with Serum PSA Level........................................................96
H. BAHRAMIAN
Is Anxiety Affecting Iranians’ Oral Health Behavior?..................................................................97
P. MEHRIAR
Effect of Magnesium on Bonding Strength of MTA Based Cement.................................................98
G. AZARBAKHSH
Evaluation of Oral Medicine New Lesson Plan, Requirement and Questionnaire................................99
A. FARZAN
A New Grading System for Orthodontic Treatment Quality Assessment.........................................100

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S. TOOPCHI
Effect of Enoxolone on Dental Plaque, Gingival Inflammation, and Bleeding....................................101
P. MEHRVARZFAR
Antimicrobial Comparison of Green Tea Extract and Calcium Hydroxide.........................................102
H. BAKHTIAR
Regenerative Endodontic Treatment of Immature Permanent Teeth by Using PRP............................103
M. KARCHED
Real-Time PCR Quantification of Periodontal Pathogens in Diabetic Kuwaiti Children.........................104
L. ATASH BIZ YEGANEH
CBCT and Periapical Radiography in Diagnosis of Strip Root Perforations........................................105
D.S. MAHOUTCHI
Diagnosis of Gingival Biotype by Probing Technique vs. Visual Method..........................................106
M. BOSKABADY
Fissure-Sealants Microleakage Based on the Type of Solvent in Bonding-Agents...............................107
M. AZARIAN
The Influence of Implant Dimension on Stress Frequency Responses............................................108
R. BARDAL
Accuracy of Different Image Modalities in Detection of Bone Lesions............................................109
N. JAMEI
Evaluation of One Iranian Probiotic Yogurt’s Effect on Salivary S. Mutans Count...............................110
M.T. BAGHANI
Evaluation of Silicone Effect on Implant Abutment Interface Microbial Leakage...............................111
Y. REZVANI
The Effect of Intranasal Midazolam with/without N2O/O2 on Children’s Behavior............................112
M. KARIMI
Knowledge of Dentists About Stepwise Excavation and Pulp Capping............................................113
J. MEHRANI SABET
Selective Alveolar Decortication Technique for Facilitating Orthodontic Tooth Movement...................114
Z. SHAKIBAEI
Accuracy of Two Radiographic Techniques in Diagnosis of Root Fractures.......................................115
M. MALEKI GORJI
SEM Evaluation of Etching Pattern of 18%HCL: A Pilot Study.......................................................116
G. RADAFSHAR
Placebo Medication for Pain Relief During Scaling and Root Planning............................................117
A. FAYAZ
Determining Depth and Radius of Curve of Spee: A Pilot Study...................................................118
N. NAGHAVI
Evaluation of Genotoxic Effects of Two Endodontic Cements......................................................119
G. RADAFSHAR
Long Term Survival Rate of teeth Requiring Multiple Treatment Procedure.....................................120
N. SOLTANIAN
Osteoblast Survival during Different Bone Harvesting Techniques: An Animal Study..........................121
F. SARLATI
Periodontal Flap and Osseous Resective Surgery Techniques: Computer Assisted Learning..................122
S. ALIJANI
Comparison of Single and Double Jaw Surgery in ClII Patients.....................................................123
H. SHEKARCHIZADEH
Self-perceived Oral Health of Addicts in Rehabilitation in Tehran, Iran...........................................124
M. KASHKULI
Home Bleaching Relapse in Patients with and without Recall Treatment........................................125
N. DABIRI
Frequency of Oral Connective Tissue Lesions in Children...........................................................126

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S. ZOKANI
Effect of Coffee on Discoloration of Three Nano Composites......................................................127
F. SHIRBAN
En-Mass Distalization of Maxillary Posterior Teeth with Mini-Screw Supported Hyrax........................128
N. MAHINFAR
The Effect of Bleaching on the Microleakage of Silorane-Based Composite.....................................129
S. RAZEGHI
Medical Emergency Management Among Iranian Dentists.........................................................130
F. BASTAMI
Demographic Factors Affecting the Survival Rate of Dental Implants.............................................131
P. MOHEBBI
Mineral Trioxide Aggregate X-Ray Diffraction Analysis at Different pH Values...................................132
N. BAYATI
Effect of Zeolite on Sealing Ability of Mineral Trioxide Aggregate .................................................133
P. OMIDSALAR
Anticariogenic Effect of Some Herbs....................................................................................134
S. RABIEI
Primary Care Nurses’ Perspective on Children’s Oral Health.......................................................135
P. VARES
Correlation between the Gingival Embrasure Space and Interdental Papilla....................................136
N. YOUSSEFI
Influence of Cavity Size Modification on Microleakage of Bulk-Cured Composites.............................137
R. POURABBAS
Effects of Plasma Rich in Growth Factors in Extraction Sockets....................................................138
M. NOURBAKHSH
Effect of Polishing and Glazing on Color Stability of Porcelain......................................................139
S. ASHNAGAR
Prevalence of Oral Lesions in AIDS and HIV Positive Patients.......................................................140
N. MOHAMMADZADEH REZAEI
Green Tea Mouthwash in Postoperative Pain Following Third-Molar Extraction................................141
S. JAFARNIA
Effect of Lip Line on Anterior Teeth Proportion Preference.........................................................142
M. BROOKHIM
Evaluation of Ki-67 and PCNA in Subtypes of Amelonlastoma.....................................................143
Z. TEHRANI
Low-Level Laser Effect on Pain after BSSO Surgery...................................................................144
A. HASSANI
Implant Placement Simultaneous Alveolar Ridge Augmentation with Block Bone Graft......................145
S. BABAZADEH
Social Capital and Self-Perceived Oral Health, Urban HEART Study...............................................146
T. SAFAIE
Effect of CPP-ACPF on Oral Symptoms of Patients under Chemotherapy........................................147
A. ORUMCHI
Double Taper and Simple Taper Fiber Posts...........................................................................148
M. SHIRYAN
Comparison of Two Adhesive Systems on FRC Post Bond Strength...............................................149
Z. MOMENI
Dental Pain and Self Perceived Oral Health, Urban HEART..........................................................150
N. BAHROLOLUMI
Cytotoxicity Evaluation of Four Intracanal Medicaments on L929 Fibroblasts...................................151
M. SAFAIE YAZDI
Stepwise Excavation Using MTA: A Randomized Clinical Trial......................................................152

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S. SABBAGH
Influence of Spatial Resolution on Detection of Non-Cavitated Proximal Lesions..............................153
S.S. FAKHR TABATABAIE
Assessment of the Electromyographic Activity and Vertical Dimension (VDR)..................................154
A.H. NEJAT
Dental Bleaching Induced Redox Perturbation........................................................................155
N. PAHLAVAN
Five Years Epidemiology Study on Oral Cancers in Tehran (2001-2006)..........................................156
M. GHOLAMI
Assessment of Adults’ Periodontal Knowledge Following a Mass Media Campaign...........................157
S. NEMATI ANARAKI
Effect of Fluoride on Enamel Roughness after Home Bleaching...................................................158
M. DEHGHANI
Effect of Combined Fluoride-Chlorhexidine Mouthrinse on Orthodontic Patients’ Oral Health..............159
M. HAJIHASANI
Effect of Irradiation Time and Distance on Nano-Hybrid Composites Microhardness..........................160
S. MARANDI
Assessing the Knowledge of Senior Dental Students towards Antibiotic Prescription.........................161
F. AFKHAMI
Radiographic Localization of Mandibular Foramen in an Iranian Population....................................162
S. BANAVA
Comparison of CalciumHydroxide, MTA, and CEM Cement in Stepwise Excavation: Final Results...........163
E. KOSARIEH
Comparison of Penetration Depth of Two Different Photosensitizers in Root Canal Wall....................164
N. KOOHESTANIAN
Assessment of Retentive Strength Orthodontic Bands Cemented with ACP-Modified GI.....................165
A.S. MOSTAFAVI
Internal Connection Reverse Torque Values in 3 Types of Abutments............................................166
M. HASSANPOUR SHATER
Prevalence of Different Techniques used in Implant Supported Fixed Prosthesis...............................167
Z. RAHMANI
Geometric Parameters of Implants and stress distribution in Partial Overdenture.............................168
A. ANSARI
Potential Psychological Effect of GA on Pediatric Dental Patients.................................................169
N. PASDAR
Oral/Intramuscular Ketamine, Midazolam, Atropine for Dental Sedation........................................170
G. ANSARI
Primary Teeth Pulpotomy with C.E.M/LLLT, Two Years Result......................................................171
M. MIR
Microleakage Analysis of Resilon Obturation Material in Laser Assisted RCT....................................172
M. ZARE JAHROMI
Effect of Triple Antibiotic and Chlorhexidine on Shear Bond of Composite.....................................173
H. NOJEHDEHYAN
PLGA Microspheres Containing Minocycline as Drug Delivery System............................................174
N. ALASVAND
Preparation of Gelatin-Hydroxyapatite Microspheres as Cell Carrier.............................................175
K. SARGERAN
Dental Visit and Number of Missing Teeth among Tehrani Elderly................................................176
S. HAMIDIAVAL
Cephalometric Assessment of Jaws Growth in 9-11yrs Normal Subject..........................................177
A. JAFARI NAEIMI
Force Relaxation of Three Different Orthodontic Latex Elastic Products..........................................178

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S.M. MOAZZAMI
Self-Sealing Ability of High Copper Amalgams with Self-Etch Adhesives.........................................179
A. AZIZI
Preventive Effect of Zinc Sulfate on Oral Mucositis...................................................................180
M.H. KHOSHNEVISAN
Oral Hygiene Behavior in Iran: National NCD Risk Factor Surveillance............................................181
J. SARABADANI
Study Experiences of Staff and Faculty Members of Oral Medicine...............................................182
B. HOJJATIE
Computational Models for Temperature/Stress Prediction in Layered Dental Porcelains.....................183
S. HONKALA
Is Toothbrushing Associated with Other Oral Health-Related Habits in Kuwait?................................184
P. LUCAS
Tooth Wear Studied via Single-Particle Interaction with an Enamel Surface.....................................185
E. HONKALA
The Effect of 5Weeks Xylitol Consumption on Oral Microflora.....................................................186
A. VAN CASTEREN
The Role of Dust, Grit and Phytoliths in Tooth Wear.................................................................187
A.J. MOULE
Residual Active Chlorine in Sodium Hypochlorite Solutions after Tissue Dissolution..........................188
Congress Contributors................................................................................189
Congress Sponsors........................................................................................191
Diamond Sponsor ..........................................................................................................192
Platinum Sponsor..........................................................................................................193
Gold Sponsor................................................................................................................194
Silver Sponsor ..............................................................................................................195

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Iranian Division of IADR President
Professor Ghassem Ansari
Dear Valued Delegates, Presenters, Colleagues
It is a great pleasure for me as the President of IADR-Iranian Division to welcome you
to the uniquely organized first joint congress of Iranian and Kuwaiti Divisions. This
congress has shaped in such a wonderful scale under the leadership of Dr. Sepideh
Banava (Congress Chair and one of the leading national researchers) and enthusiasm
of her team in association to all of you who made this to happen by your contribution.
I like to high light that as most of the other international events, this congress has
also taken such an enormous amount of work and communications in order to allow
this to happen. All preparation and arrangement steps of this congress were made
possible by individual courage and enthusiasm of each and every member of the
organizing team which deserves my personal appreciation.
As the nature of the IADR congresses provides unique opportunities for researchers
in various fields, this one is no exception. Being engaged and responsible in almost
all of the Iran’s IADR history, I am confident to say that this year’s event is planned as
one of the most active and well covered research products of the two divisions. This
is clearly highlights the position of the research status in this region and the potential
role could be played by the two divisional members within the IADR network. I
also like to emphasis that this year’s event illustrates the research capacity of our
nationwide dental scientists.
As the main policy of the IADR Iranian Division is to use all of its potential research
opportunities it is hoped that within the next couple of years this country can find its
deserved international position. A nationwide plan is on to engage all of the national
dental research active members. Herewith I urge everyone to register with us and
let us keep our files updated with all research activities going on in every corner
of our great country. Being the largest in dental population size, academic facilities
and research institution numbers which inevitably provide massive potentials for
research production compare to other nations of the region in EMRO and most
probably AMER groups, I am confident that we are impatiently moving towards
our goals. This will eventually reveal the actual role of Iran in the world of Dental
Research.
Another unique aspect of this congress is collaboration of the WHO and their offices
Organizing Committee Messages

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in the region. With the leadership of Prof Khoshnevisan who has headed his Iranian
counterparts, we will have several symposiums and group discussions in the field
of Community Oral Health and their hot topics. With the presence of WHO active
representatives in the region in these discussions I am sure these meetings will
provide valuable outcomes for their group and their communities.
I am fully aware as there have been massive efforts and courageous in our dental fair
team which resulted in their collaboration with several supporting companies and
dental agents who offered their full support to make this year’s dental exhibition
different. This is why I like to express my personal appreciation to their directors and
engaged team in the congress in advance.
The IADR Headquarter team is thanked for their support and help throughout the
course of congress preparation and in particular the CONFEX facility providers who
made the online submission, review and registration of the congress possible, Special
thanks to Dr. Christopher Fox, Ms Marissa Napinsky and Ms Denise Steszoff for their
valued helps.
Last but not least, I like to say that it is of great value to me and my colleagues to
share this year’s congress with the Kuwaiti colleagues. The Iranian team’s highest
appreciation is expressed to Prof Jawad Behbehani president of AMER and Prof Eino
Honkala who were fully supportive of this event from start. Without their generous
help and support such collaboration would not form to this level. I also like to express
my appreciation to all other international colleagues who have contributed to this
congress. I can reassure everyone that this rather small but unique community, when
compared to other Dental Associations, has a lot to say and will bring valued ideas,
research results and courage to those involved in the field of Dental and Medical
research. I hope that you enjoy your time here in Tehran and have a wonderful
scientific occasion to remember for years to come.
With Best regards
Professor Ghassem Ansari
President of the IADR Iranian Division

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Congress President
Dear Distinguished Colleagues, Researchers, Dentists, and Students,
This is a great opportunity for me to express my deep gratitude to you and welcome
you to the 9th
Iranian and 13th
Kuwaiti divisions of IADR Joint Congress.
In every IADR congress around the world, the latest research results are presented.
For those students, dentists, and researchers who put a lot of effort into moving
along with developments in the realm of knowledge, technology and research, IADR
is the best way to keep themselves up-to-date.
In the field of science and research, every single question matters and can inspire
new studies. A researcher becomes GLOBAL instantly by presenting his/her research
in any of the IADR congresses.
In my opinion, IADR congress builds a strong bridge between science, knowledge,
research, technology and dental clinics. Therefore this scientific and prestigious
congress connects all the people in these areas.
The 9th
Iranian division of IADR congress is so special this year due to several reasons;
the Kuwaiti division has joined and a close collaboration has happened between the two
divisions; WHO Collaborative center in Iran has organized a symposium to connect the
oral hygiene leaders in the region. A hard effort was made by the organizing committee
since almost a year ago to acquaint dental students, general dentists, and specialist with
the scientific and research basis of the IADR Another positive point of this congress is
having a close and scientific collaboration of dental companies with IADR.
This great event was not possible without tremendous efforts of my valued team
and their supports. I’m really grateful of Dr. Omid Moghaddas, Dr. Arash Rahimi,
Dr. Mohammad Safaie Yazdi and Ms. Azin Kazemi who stood by me during the
organization of the congress. Last but not the least I want to express my special
thanks to Dr. Ghassem Ansari who trusted me for holding this congress.
I wish you all great days in this international congress.
Dr. Sepideh Banava
9th Iranian IADR Congress President

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Head of Scientific Committee
Dear Colleagues,
It is an honour and a great pleasure to welcome you all to the 9th
Annual Meeting and
Scientific Congress of IADR Iranian Division in Tehran, Iran from December 11-13,
2013. This is a joint program with 13th
Kuwaiti Division and WHO collaborating Center
for Training and Research in Dental Public Health in Iran.
I am proud and thankful for the considerable extent of scientific contribution
this year. This meeting consists of 11 scientific workshops, 68 oral and 78 poster
presentations on current dental and collateral research findings selected from 250
submitted articles. Furthermore, a 3-day WHO symposium will run concurrently
with scientific sessions. This would be a unique opportunity to exchange valuable
knowledge and recent advances in the field of dental research among scientists in
this region and we hope this event will facilitate more communication and application
of the research findings. The scientific presentations will be scheduled according to
the IADR scientific groups and the final outline will be presented in the congress
program.
On behalf of the scientific committee, I would like to express my sincere gratitude
toward those who collaborate with us in different committees and concerned
authorities, in addition to our 30 valuable referees and other dental research centers
for their dedication and support.
I would like to welcome you all to this event with the hope for contribution towards
improvement of Oral Health Researches.
Sincerely,
Dr. Azita Tehranchi
Head of Scientific Committee

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Head of Executive Committee
Dear colleagues and friends
It is my great pleasure to welcome you to the 9th
annual congress of Iranian division
of IADR in Tehran. The members of Executive, Organizing and Scientific committees
of Iranian Division of IADR worked so hard to prepare an outstanding program, and
we are all grateful to them for their efforts.
The scientific program of IADR will cover all the major aspects of dentistry, presented
by prominent scientists and clinicians and researchers. The conference is also a
unique social opportunity to make new acquaintances, meet colleagues from other
countries and better know the different National Dental Societies of Iran. This year
the congress is joint with 13th
annual congress of IADR Kuwaiti division and we are
honored to have special guests from Kuwait.
I am honored and privileged to be the Head of the Executive committee in this
congress and I would like on this occasion to express my gratitude to all people that
have contributed to the success of the Iranian division of IADR : Past and present
Presidents, General Secretaries,Treasurers and National Delegates. Special thanks to
our friends from the Industry, true partners and supporters of the IADR goals.
I wish you all a wonderful and memorable experience.
Dr. Omid Moghaddas
Head of the Executive Committee

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Head of Exhibition Committee
Dear Colleagues,
It is a great pleasure to welcome you to this international congress with a different
exhibition.
In this congress, different companies participated to express themselves with their
R&D sections to scientifically communicate with the participants. We are thankful to
all companies who play an important role in making congresses glorious.
In this congress, unlike the past Iranian IADR congresses, some dominant companies
have participated as financial sponsors of diamond, platinum, gold, and silver.
I am deeply grateful because of their companionship and hopeful to have their
support in the future.
Sincerely yours
Dr. Arash Rahimi
Head of Exhibition Committee

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Organizing Committee
Congress President: Dr. Sepideh Banava
Head of Scientific Committee: Dr. Azita Tehranchi
Head of Executive Committee: Dr. Omid Moghaddas
Vice Executive Director: Dr. Mohammad Safaie Yazdi
Head of Exhibition Committee: Dr. Arash Rahimi
Vice Exhibition Director: Babak Mamizad
Congress Advisors: Dr. Ghassem Ansari, Dr.Mahtab Nouri, Dr. Haleh Heshmat,
Dr. Ebrahim Aminsalehi, Dr.Ali Saghiri, Dr.Keivan Saati
Poster Committee: Dr. Haleh Heshmat (Director), Dr. Pooneh Mohebbi,
Dr. Raha Tafaroji
Workshop Committee: Dr. Ehsan Esnaashari (Director), Dr. Arezou Pezeshkfar,
Dr. Mansoureh Emami Arjmand, Dr.Ali Mansouri
Public Relations & International Affairs Secretory: Azin Kazemi
IADR-WHO Symposium Committee: Dr. Mohammad Hossein Khoshnevisan,
Dr. Arezoo Ebn Ahmady, Dr. Sepideh Rabiei
Registration Committee: Dr. Sima Alizadeh, Dr. Mona Kashkuli, Shahla Hamidi,
Mahsa Hamidi, Jamileh Toghi, Termeh Shemirani, Haniye Tehrani, Janet Shahverdi
Website Designing & Support: Flying Feathery Group
Publication Committee: Azin Kazemi, Ehsan Shams
Graphic & Design: AfraviGroup (Foroozan Kheiri, Bahram Afravi)
VIP & Ceremonial Committee: Dr.Vida Dolati, Dr. Mehrnoush Ghobadi,
Dr. Linda Nematollahian, Leila Pourjafar
Audio-Visual & Media Committee: Zhoubin Ghaziani
CE Credit Committee: Zeinab Mozafartash
Student Executive Members (in alphabetic order): Haniyeh Haeri Araghi (Head),
Sahar Abdollahzadeh, Mina Aghabeygi, Elnaz Alavi, Nazanin Allahyari, Mahsa Amjad,
Hamidreza Alimoradi, Parmida Ariaei, Saghar Bahmani, Alireza Darnahal, Nafiseh
Farajian Zadeh, Ehsan Farjad, Seyed Hesamodin Haeri Araghi, Zohreh Heydari, Zahra
Jabari, Marjan Javadzadeh, Omid Javadzade, Zohreh Kazemi, Peiman Kermaniha,
Keikhosro Khosraviani, Donya Sadat Mahoutchi, Negar Manouchehri, Pegah
Mirmalek, Nima Mohahegh Dolatabadi, Mehrdad Moradi, Azin Orumchi, Shabnam
Pourhaghani, Shadi Poursoltani, Shima Rashidi, Mahdieh Sahrakari, Niloufar Saleh,
Mahsa Shadi, Targol Shafizade, Masoud Shahhoseini, Zahra Shakeri, Hamed Shojaei,
Negar Soltanian, Sedigheh Toraji, Peyman Vares, Bahareh Yousefian, Mahsa Zeinali,
Negin Zokaie, Kaveh Zolfaghar Nasab

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Iranian & 13th
19
Iranian IADR Officers
Ghassem Ansari: President
Sepideh Banava: President-Elect
Raheleh Hassanizadeh: Secretary
Mohammad Jafar Eghbal: Treasurer
Ghassem Ansari: Councilor
Mahtab Nouri: Immediate Past President
Scientific Committee & Abstract Reviewers
Ghassem Ansari
Arash Azizi
Sepideh Banava
Katayoun Esfahanizadeh
Ali Hassani
Raheleh Hassanizadeh
Haleh Heshmat
Eino Honkala (Kuwait)
Sisko Honkala (Kuwait)
Tabassom Hooshmand
Mohammad Reza Khami
Mandana Khatibi
Arash Khojasteh
Mohammad Hossein Khoshnevisan
Sandra Mehralizadeh
Hesam Mirmohammadi(Netherlands)
Omid Moghaddas
Nahid Mohammadzadeh Akhlaghi
Faramarz Mojtahedzadeh
Mahtab Nouri
Reza Pourabbas
Arash Rahimi
Alireza Sadr (USA)
Mohammad Ali Saghiri
Javad Sarabadani
Farhad Shafiei
Azita Tehranchi

9th
Iranian & 13th
20
Sessions Chairs
Dr. Ali Kangarloo
Dr. Mohammad Hossein Nekoofar
Dr. Mohsen Amin Sobhani
Dr. Ezzatollah Khamesi
Dr. Ebrahim Majidi
Dr. Ali Khader
Dr. Mohammad Reza Khami
Dr. Haleh Heshmat
Dr. Tabassom Hooshmand
Dr. Amir Nazari
Dr. Seyed Mohammad Reza Safavi
Dr. Majid Ghasemianpour
Dr. Fariborz Amini
Dr. Mahtab Nouri
Dr. Mohammad Hossein Khoshnevisan
Dr. Amjad Matouq
Dr. Arezoo Ebn Ahmady
Dr. Sisko Honkala
Dr. Soodabeh Sargolzaie
Dr. Kaveh Oloomi
Dr. Hossein Bagheri
Dr. Arash Rahimi
Dr. Emad Kosarieh
Dr. Mahkameh Moshfeghi
Dr. Ahamad RezaTalaeepour
Dr. Sandra Mehralizadeh
Dr. Saeid Mostafa Moazzami
Dr. Tahereh Sadat Jafarzadeh Kashi
Dr. Fatemeh Sadat Tabatabaie
Dr. Salahudeen AlBulushi
Dr. Fatemeh Mashhadiabbas
Dr. Farnaz Mahdisear
Dr. Mehdi Valizadeh
Dr. Kiumars Nazari Moghaddam
Dr. Saied Nemati
Dr. Arash Khojasteh
Dr. Alireza Jafari Naeimi
Dr. Hamid Moghaddas
Dr. Mohammad Jafarian
Dr. Kaveh Seyyedan
Dr. Hossein Behnia
Dr. Katayoun Esfahanizadeh
Dr. Payman Mehrvarzfar
Dr. Haleh Kazemi Yazdi
Dr. Eino Honkala
Dr. Ghassem Ansari
Dr. Mojtaba Vahid Golpayegani
Dr. Lida Toumarian
Dr. Javad Sarabadani
Dr. Masoud Ejlali
Dr. Faramarz Mojtahedzadeh
Dr. Alireza keshvad
Dr. Nasrin Esfahanizadeh
Dr. Afsaneh Pakdaman
Dr. Nahid Mohammadzadeh Akhlaghi
Dr. Shahram Azimi
Dr. Alexander John Moule
Dr. Peter Lucas
Dr. Khosrow Golshan
Dr. Ahmad Najafi
Dr. Hassan Torabzadeh
Dr. Mahdi Nasibi
Dr. Hossein Hesari
Dr. Suleiman Mohammad
Dr. Abdolhamid Zafarmand
9th
Iranian & 13th
Kuwaiti Divisions of IADR Joint Congress - Abstract Book

9th
Iranian & 13th
22
Dr. Ayoub Pahlevan, DDS, MS
Associate Professor
Tehran University of Medical Sciences, Dental Faculty
Restorative Department, Iran
A General Look to Dentin Bonding Systems
Nowadays dentists are really confused about the type of the Dentin Bonding Agents
(DBA) they are going to select and apply in different clinical cases. Bonding to enamel
has been approved for many years and is very reliable but the issue is different with
bonding to dentin.
There are different factors that make the bonding to dentin more questionable.
Nature of the substrate, tag formation, etching pattern and chemical composition
are different from enamel and these make the bonding to dentin very technique
sensitive.
New DBAs are developed to fulfill the whole area but there is need to further
research regarding the type of DBA that is suitable and more reliable in different
clinical situations. Future needs clinical research and clinical evidence for successful,
reliable and non-degradable bond to tooth structure.

9th
Iranian & 13th
23
Nelson R. Pinto, MD
University of Concepcion, Chile
Graduatefrom, Faculty of Dentistry ,University of Concepcion, Chile 1985.
Residence in Oral Implantology Ohio State University Faculty of Dentistry, USA, 1990.
Residence in Oral Implantology Friburg University Faculty of Dentistry, Germany, 1992.
Head of Clinica San AgustinRestorative Implant Department 1993 - 2013
Private Practice exclusive in Oral Implantology. 1989 - 2013
National and International Lecturer in Oral Implantology ( morethan, 200 conferences)
National and International Lecturer of Courses in Oral Implantology (more than, 100 courses)
Nobel Biocare Key Clinician Consultan 2006 - 2013
Intra-lockInt. Key Clinician Consultant 2005- 2013
Professor, Post GraduateProgram in Oral Impantology and Periodontics,
Facultad de Odontología. Universidad de los Andes, Chile 2010 -2013
Visitant Professor: University of Concepcion, Faculty of Dentistry, Implant Program
Several Prizes in Clinical Research Presentations
Developer of a novel technique for the management of Chronics Wounds with Leucocytes -
Platelet Rich Fibrine, Best Oral Research Presentation Prize
L-PRF: Technique Overview to Clinical Applications
This Symposium will present the background, science, applications and methodologies
regarding the use of L-PRFTMmembranes. Clinical cases will be shown to further illustrate the
techniques and results that can be derived from its use. The hands-on workshop will enable
the participants to become familiar with the membrane-forming apparatus and the various
techniques that are utilized when creating and manipulation L-PRFTMmembranes.Upon
completion of this hand-on workshop, the participants will have a better understanding of
the physiological mechanisms that are pertinent to membrane formation and that take place
during augmentation procedures. They will be more familiar with the strategies that enable
L-PRFTMto be such a beneficial aid during the healing process. During the hands-on exercises,
theparticipantswillhavetheopportunitytoworkwiththemembrane-formingarmamentarium
and to employ the techniques necessary for the fabrication of L-PRFTMmembranes and for
their correct clinical placement.

9th
Iranian & 13th
24
Dr. Mohammad H. Nekoofar
Endodontist, DDs MSc DoIBoE PhD
Vice Dean (Global Strategies & International Affairs)
School of Dentistry, Tehran University of Medical Sciences, Tehran, Iran
Honorary Clinical Lecturer
School of Dentistry, Cardiff University, UK
Basic Requirements of Dental Biomaterials in Endodontics
Thelaunchingofmineraltrioxideaggregatein1995canbeconsideredastheinitiation
of the rocketed development of new biomaterials in the field of endodontics.
Imperatively, any new biomaterial must not be used for human being until subjected
to various defined independent experiments.
Obviously manufacturers of new materials cannot postpone marketing of their
materials and waiting for the results of the time consuming academic experiments.
Therefore they try to bypass some of the basic experiments. It becomes worse
when the inventor and the manufacturer of a material are same. In addition, the
essential physical and chemical properties of a material may ignore to expedite their
marketing.
In this presentation, basic and general requirements of dental biomaterials in the
field of Endodontics will be discussed and the lack of information about some of the
newly introduced biomaterials will be highlighted.

9th
Iranian & 13th
25
Dr. Shahram Azimi, DDS, Ms
Endodontist, Iran
Pain Control
Effective pain control during and after endodontic treatment is an essential key
for the success of root canal therapy and also professional practice. One of the
challenging occasions for a clinician is to control and obtain deep anesthesia when
the patient has urgently been referred because of sharp and diffused pulpalgia. Even
experienced clinicians might face challenges to achieve deep numbness in case that
are so called ‘Hot tooth “.
Various theories such as decrease in PH, morphologic changes of neuron, expression
of new receptors on axon surface are among those that are currently debated.
While reviewing these theories as the probable causes of resistance against achieving
anesthesia, clinical solutions to overcome such problem would be discussed.

9th
Iranian & 13th
26
Dr. Masoud Mojahedi, DDS, MSc, PhD
Associate Professor, Adjunct faculty member of RWTH Aachen University- Germany
PhD in Laser in Dentistry
Research in LASER Field
These days due to increasing the number of LASER users and dentists interests also
the lack of new research and evidence bases in this field so It is very important to
know how we should plan a research and how we can reach to the scientific target
and hope this short course can help to all dentist and students which are interested
to have scientific and academic activates.

9th
Iranian & 13th
27
Dr. Amir Nazari, DDS, Ph.D
Cariology and Operative Dentistry, Tokyo Medical and Dental University
NICOPE Corporation,
JAPAN
Toward Perfection in Operative Dentistry: Optical Coherence Tomography
Achieving perfection in operative dentistry requires perfection in diagnosis. Optical
Coherence Tomography (OCT) is a unique diagnostic modality which obtains real-
time 2D and 3D high-resolution scans of internal structures using non-ionizing near
infra-red spectra. Various applications of OCT have been suggested.
OCTmaybeusedduringcariesdiagnosistodetectshallowlesions;duringexamination
of a previously restored tooth to evaluate the condition of the restoration; during
cavity preparation to check the remaining dentin thickness over the pulp chamber;
during placement of resin composite into the cavity to check the proper adaptation
of the composite to the cavity surfaces; during post-operative stage to check for any
defects at the margins or presence of voids within the restoration.
The OCT technology is rapidly developing, and with no doubt, OCT can bring us
closer to perfection.

9th
Iranian & 13th
Dr. Babak Behboudi
Vice President of Middle East and Oceania, International Institute of Marketing
Professionals (IIMP®)
The Applications of Marketing Research in Dental Research & Clinics
Despite of its attributes, marketing researches and studies have vast applications
in dental researches. There are a wide range of similarities in both researches and
studies that are looking for solving the key problems of patients. Whether we call
them clients or patients, the focus point of both marketing researches and dental
researches is human being; one is looking for understanding the needs, wants and
demands of a patient as a client for receiving better dental care services and cure,
and another is looking for exploring new cure for dental damages and ailments.
Every clinical research aims to develop a new solution for old or newly found ailments
and the successful solutions are those that can be commercialized in a manner that
could be applicable cost effectively by dentists.
However, there is a gap between the approaches of a solid dental care study and
research and those of marketing approaches to the same problem which can be
considered as the dark continent of commercialization of dental research and
studies. There is no doubt that if a dental care study or research can produce
commericializable solution, such a solution can be successfully developed to benefit
both dentists and their patience.
Every dental care solution should be considered as a product (or customer solution)
and, by considering the patient as a customer, needs to be delivered through a precise
marketing mix including the critical elements of customer solution, cost to customer,
convenience to customer, communication to customer, considering the culture of
customer, customer care process and context of the solution for the customer.
This article strives to clarify the common context of clinical researches and studies
with marketing research and studies in dental care context and the key factors that
should be considered in commercializing the dental care solution and products.

9th
Iranian & 13th
30
Dr. Haleh Heshmat, DDS, MS
Specialist in Restorative Dentistry
Assistant Professor
Azad Dental University, Dental Branch, Iran
All About Resin Cements
Clinicians might be familiar with the quality and indications of conventional dental
cements that historically have been used frequently.
But it appears that many yet become confused when it comes to handling self-etch
or self-adhesive cements.
In this workshop an extensive presentation of resin cements and recent generations
of self-adhesive resin cements shall be given. Chemical composition, its effect on
the setting reaction and adhesion to various substrates, physical and biological
properties and other material aspects along with clinical points and handling
guidelines shall be discussed.

9th
Iranian & 13th
31
Faramarz Mojtahedzadeh, DMD, MS, MMed
Orthodontist, Iran
Forced Eruption
Forced eruption (FE) is a simple orthodontic movement which basically intends to
extrude the tooth structure. FE can be carried out in different occasions and with
different intentions, and once a dentist becomes familiar with it, he or she could take
advantage of it in many fields as an adjunctive treatment. The method presented in
this workshop has the advantage that it requires minimum a recall of orthodontic
knowledge. As it does not require conventional fixed orthodontic appliances and
designs, the complex biomechanical interactions seen with brackets can be easily
bypassed.

9th
Iranian & 13th
32
Dr. Sepideh Banava, DDS, MS
Assistant Professor
Head of Dental Materials Department
All About Adhesive Systems
Different adhesive systems in the market make us so confused. Various classifications,
differentapplicationstepsandcompositionsaresocompromising.Selectionbetween
total etch and self etch adhesive systems is a question for dentists.
Newly introduced adhesive generations are more self-etch with better properties
claims. Dentists Need to be aware of adhesive systems, properties, method of
application to make a proper decision in their clinical cases.
In this workshop all questions about the new generation of adhesives will be covered.

9th
Iranian & 13th
33
Dr. Shahram Azimi, DDS, Ms
Endodontist, Iran
Rotary Instrument in Dentistry
In this hands-on workshop the clinical tips on application of rotary instruments in
endodontics will be discussed.

9th
Iranian & 13th
34
Dr. Arash Rahimi, DDS, MSc
Iran
Application of Diode Laser in Dentistry
Laser technology is quickly evolving with the presence of newer lasers, along with
new indications, that are constantly being introduced. The use of lasers has become
a major discipline and is currently practiced in dentistry.
This workshop offers practical usage of diode laser in dentistry.

9th
Iranian & 13th
35
Omid Moghaddas, DDS, MS
Periodontist, , DentalXP Expert, Iran
Ridge Splitting with Piezosurgery
Inserting dental implants in a proper position is one of the most influential factors
in achieving success not only from the biomechanical point of view but also from
prosthetic and esthetic. In some patients there is not enough available bone so
different modalities in ridge augmentation have been proposed for recreating a
proper bony bed. Ridge splitting is one of the techniques for increasing the width of
the available bone present and has its own criteria. In the workshop the indications,
contraindications and probable complications that may happen intra-operatively will
be discussed and participants will have a hands on training on animal models.

9th
Iranian & 13th
36
Dr.Haleh Kazemi Yazdi, DDS, MS
Assistant Professor
Management of Tooth Wear, Functionally & Aesthetically with Supra-Occlusion
Composite Restorations
According to the latest epidemiological survey, prevalence of tooth wear is increasing
significantly among young and elder patients. Restorative management of worn
dentition is a great challenge in general dental practice when tissue loss involves the
articulating surface. Short clinical crown height of worn teeth and inadequate space
to accommodate a proper restoration can compromise the vitality of worn teeth and
resistance of restorations. Using supra-occlusion restorations to restore tooth wear
is both reliable and predictable .Reliability and predictability of direct bonding to
residual tooth tissue, widened the indication of direct composite restorations from
just a single tooth build up to a practical option for full mouth rehabilitation. In
spite of a few problems such as discoloration and chipping of restorations; a stable
occlusion can be achieved with this treatment. The objective of this brief will be
illustrating techniques and considerations of restoring worn teeth utilizing supra-
occlusion composite restorations.

9th
Iranian & 13th
37
Dr.Fariba Motevasselian, DDS, MS
Specialist in Restorative Dentistry, Iran
Management of tooth wear
The term tooth wear is a general term that can be used to describe the surface loss
of dental hard tissues from causes other than dental caries, trauma or as a result of
developmental disorders.
It is subdividing into those where the severity of tooth wear may be considered to be
normal or physiological for that person’s age, or excessive, pathological to the extent
that it is associated with functional or aesthetic concerns and is disproportionate for
the age of the patient and symptoms of discomfort are present.
Treatment plan includes the management of any acute conditions, prevention,
stabilization of any underlying dental pathology, placement of definitive dental
restorations and final stage involves monitoring and maintenance. It is important
to institute review stages in passing from one stage to the next one. While for
many cases of pathological tooth wear, a passive management and monitoring
may suffice, for a proportion of cases active restorative intervention will become
necessary. Active restorative intervention will be subdivided into that for localized
wear (Maxillary anterior teeth, Mandibular anterior teeth, localized posterior teeth)
and generalized wear.
The restorative intervention in three localized tooth and one generalized tooth wear
cases are presented.

9th
Iranian & 13th
38
Dr.Ebrahim Aminsalehi, DDS, MS
Assistant Professor
The Clinical Tips on Ceramic Restorations
Nowadays request for esthetic restorations increase more and more. The main
reason is that people knows about our capability to create a beautiful and particularly
natural smile. Ceramic laminates and crowns are ideal restorations for anterior and
posterior teeth but when they can show their ideal performances that practitioner
have enough knowledge about composition, variety, advantages, disadvantages,
indications and contraindications of these materials.

9th
Iranian & 13th
39
Dr. Brigitte Douaihy, DDS
Professional Service Manager
GC Middle East
Composite Restorations: New Concepts and Applications
In modern dentistry, composite restorations occupies a major place in our daily
practice. This workshop covers all new concepts and techniques in anterior esthetic
restorations and in posterior cases.
Minimum Intervention: A way to Go
Prevention and conserving tooth structure are of a major importance for both
dentists and patients.
During this workshop we will propose a new way to take in charge the patient and
to assess the risk factors all this in order to put in place the optimal treatment plan.

9th
Iranian & 13th
40
This symposium is a cooperation between WHO Collaborative Center, SBMU,
Tehran, Iran and Iranian Division of IADR.
Dr. Ali Khader: How can we develop comprehensive preventive strategies at the
regional level: what should the specific time line priorities be, should these be
disease specific? Which social and environmental health determinants should be
incorporated and how?
Dr. Suleiman Mohammad: How can we measure oral health inequalities and who
should undertake this at the regional level? How can we establish a knowledge base
that uses a standard set of reporting criteria?
Dr. Mohammad H. Khoshnevisan: Upstream strategies- how best can researchers
and public health practitioners work together to develop, implement and evaluate
the effectiveness of upstream oral health improvement strategies?
Dr. Amjad Matouq: Promoting oral health advocacy - what opportunities exist at
local, national and international levels in developing oral health advocacy activities?
Dr. Salahudeen AlBulushi: Future research priorities -what are the future priorities in
oral health inequalities research? What are the training needs for the next generation
of dental researchers to equip them to work effectively on inequalities agenda?
IADR-WHO Symposium

9th
Iranian & 13th
41
Dr. Keivan Saati, DDS, MS
Assistant Professor
All About Bleaching
Dental bleaching, also known as tooth whitening, is a common procedure in
general dentistry. According to the FDA, whitening restores natural tooth color and
bleaching whitens beyond the natural color. There are many methods available,
such as brushing, bleaching strips, bleaching pen, bleaching gel, and laser bleaching.
Bleaching methods use carbamide peroxide which reacts with water to form hyDr.
ogen peroxide. Carbamide peroxide has about a third of the strength of hyDr.ogen
peroxide.. The peroxide oxidizing agent penetrates the porosities in the rod-like
crystal structure of enamel and breaks down stain deposits in the dentin.
Causes of tooth discoloration : A child’s deciduous teeth are generally whiter than
the adult teeth that follow. As a person ages the adult teeth often become darker due
to changes in the mineral structure of the tooth, as the enamel becomes less porous
and phosphate-deficient. Teeth can become stained by bacterial pigments, food-
goods and vegetables rich with carotenoids or xanthonoids. Certain antibacterial
medications (like tetracycline) can cause teeth stains
Other causes: Tetracyclines Enamel hypoplasia Fluorosis Age of the tooth Tea Coffee
Tobacco ( tar ) Mate Wine and cola Dr.inks consumed in excess Other foods and oral
tobacco products with strong content of pigments Chlorhexidine
Method :According to the American Dental Association, different whitening methods
include in-office bleaching, which is applied by a professional dentist; at-home
bleaching, which is used at home by the patient; over-the-counter, which is applied
by patients
The ADA recommends to have one’s teeth checked by a dentist before undergoing
any whitening method. The dentist should examine the patient thoroughly: take a
health and dental history observe hard and soft tissues, placement and conditions

42
of restorations, and sometimes x-rays to determine the nature and depth of possible
irregularities.
. Bleaching is not recommended if teeth have decay or infected gums. It is least
effective when the original tooth color is grayish and may require custom bleaching
trays. Bleaching is most effective with yellow discolored teeth.
In-office : In-office bleaching procedures generally use a light-cured protective layer
that is carefully painted on the gums and papilla to reduce the risk of chemical
burns to the soft tissues. The bleaching gel typically contains between 10% and 44%
carbamide peroxide, which is roughly equivalent to a 3% to 16% hyDr.ogen peroxide
concentration.
Internal bleaching :Internal bleaching procedures are performed on devitalized
teeth that have undergone endodontic treatment (a.k.a. “Root Canal”) but are
discolored due to internal staining of the tooth structure by blood and other fluids
that leaked in. Bleaching the tooth internally involves Dr.illing a hole to the pulp
chamber, cleaning, sealing, and filling the root canal with a rubber-like substance,
and placing a peroxide gel or sodium perborate tetrahyDr.ate into the pulp chamber
so they can work directly inside the tooth on the dentin layerIn this variation of
whitening the whitening agent is sealed within the tooth over a period of some days
and replaced as needed, the so-called “walking bleach” technique
At-home :Commercial whitening products intended for home use include gels,
chewing gums, rinses, toothpastes, among others. The ADA has published a list of
accepted over-the-counter whitening products to help people choose appropriate
whitening products.
High-concentrationhomebleachingusescarbamideperoxide.Whiteningisperformed
by applying a high concentration of oxidizing agent to the teeth with thin plastic trays
for a short period of time, which produces quick results. The application trays ideally
should be well-fitted to retain the bleaching gel, ensuring even and full tooth exposure
to the gel. Trays will typically stay on the teeth for about 15–20 minutes. Trays are then
removed and the procedure is repeated up to two more times.
Low-concentration whitening is far less effective. Low-concentration whitening
involves purchasing a thin mouth guard or strip that holds a relatively low
concentration of oxidizing agent next to the teeth for as long as several hours a day
for a period of 5 to 14 days. Results can vary, depending on which application is
chosen, with some people achieving whiter teeth in a few days, and others seeing
very little results or no results at all.
9th
Iranian & 13th

Oral & Poster Presentation
Abstracts in order of ID numbers

9th
Iranian & 13th
44
181423
Biomimetic Synthetic Enamel: A Potential Remineralizing Agent for Enamel Repair
H. BAGHERI G1
, F. SHAFIEI2
, T.S. JAFARZADEH KASHI3
, and M. BEHROOZIBAKHSH3
,
1
Institue for research in Dental Sciences/School of Dentistry, Tehran University of Medical
Sciences, Tehran, Iran, 2
Tehran University of Medical Sciences, Tehran, Iran, 3
Research Center
for Science and Technology in Medicine; Tehran University of Medical Sciences, Tehran, Iran
Objectives: Currently, remineralizing agents are being considered as a preventive
strategy to stop the mineral loss process and to alter the oral conditions toward
remineralization. Up to now, fluoride or calcium phosphate containing systems have
been introduced to remineralize the defected enamel tissue. Recently polypeptides
have been used for regulation of the mineralization process. The aim of this study
was to evaluate the regulatory capacity of leucine-rich amelogenin peptide (LRAP)
on the calcium phosphate mineralization.
Methods: Mineralization solutions were prepared to yield final concentration of 2.5
mM Ca+2
, 1.5 mM phosphate, and 2 mg/ml LRAP (GL Biochem China) (pH=7.2). 1 ppm
F- was added to the selected solutions to study the effect of fluorine ion. Calcium
phosphate or fluorine-containing (1 ppm) solutions were used as the controls.
The solutions were incubated at 37°C for 72 h. Transmission electron microscopy
(TEM), atomic force microscopy (AFM), and selected electron area diffraction (SAED)
techniques were used to study the mineralization characteristics.
Results: SAED analysis revealed diffraction patterns corresponding to the apatite
structure in all solutions. TEM analysis showed that in LRAP-containing solutions
fibers of hydroxyapatite or fluoroapatite arranged in bundles, while in solutions
without LRAP, the crystallization occurred without that arrangement. AFM imaging
showed the hierarchical prismatic assembly of HA and FA crystals, similar to the
enamel structure.
Conclusions: LRAP can regulate the crystallization of calcium phosphate and produce
prismatic structures like dental enamel. Therefore, LRAP-CP has the potential to be
used as a remineralizing agent for enamel reconstruction.

9th
Iranian & 13th
45
181508
Adherence of Iranian Dentists to Information Technology
S. MOHEBBI, M. BONABI, M.R. EBRAHIMPOUR, M. SAHEBJAMEE, and A.J. ABBASI, Tehran University
of Medical Sciences, Tehran, Iran
Objectives: In the health field, there have been fast development and expansion of
use of information and communication technology (ICT) such as navigation portals,
telemedicine and dentistry, remote medicine and dentistry, and patient data-storing.
This study aimed to assess the knowledge and usage of professional IT applications
among dentists.
Methods: The data were collected by a self-administered validated questionnaire
distributed among dentists participating in the 52nd
International Congress of Iranian
Dental Association and a random sample of dentists working in Tehran. It included
7 questions about knowledge, 8 questions on backgrounds, 10 questions on general
usage of IT, and 3 questions on the professional usage of IT. The data were entered
into SPSS version 18 and the statistical analyses were performed by ANOVA, NPAR
test, and regression modeling.
Results: From the total of 303 general practitioners, 30.4% were male and 11 dentists
(3.6%) indicated that they had no access to a personal computer. Some of the most
popular sites used by dentists were Google (94.3%) and social network of Facebook
(69.8%). Those with higher scores in general usage of IT had more consulted with
their patients through the Internet. The practice of professional IT was more in men
and among those with higher general usage of IT.
Conclusions: This study was a preliminary evaluation of the topic among oral health
professions indicating IT to be almost available to most but not all dentists in Iran.
Dentists participating in the study had insufficient knowledge and their professional
IT usage is defective and weak, needing more consideration and training.

9th
Iranian & 13th
46
181684
Fracture Resistance of Posts in Full-Coverage Restorations of Primary Incisors
A. BAGHALIAN1
, M. RANJPOUR2
, T. HOOSHMAND3
, and A. EBRAHIMI2
, 1
Qazvin University of Medical
Sciences, Tehran, Iran, 2
Qazvin University of Medical Sciences, Qazvin, Iran, 3
School of Dentistry/
Research Center for Science and Technology in Medicine, Tehran University of Medical Sciences,
Tehran, Iran
Objectives: The purpose of this study was to evaluate the fracture resistance of 4
different posts in full-coverage restorations of severely decayed primary incisors.
Methods: 50 primary incisors were selected for this study and all the teeth were
sectioned 1 mm above the CEJ. After filing and irrigation of root canal space, the
canals were obturated with metapex and 3 mm of post space was prepared inside
the canals. Intact glass fiber post, split-ended glass fiber post, composite resin post,
and orthodontic wire γ post were used as intracanal posts. The final composite resin
restoration was done by using pedodontic strip crown. After thermocycling the
specimens, the fracture resistance was measured using a universal testing machine.
Results: The mean fracture resistance of split-ended glass fiber posts was higher
than that of other posts; however, there was no significant difference between any
of the groups (P>0.05).
Conclusions: Split-ended glass fiber posts seem to be a more appropriate option for
full-coverage restorations in primary incisors.

9th
Iranian & 13th
47
182551
Human and Animal Bone Substitutes for Augmentation before Implant Placement
A. KESHVAD, Shahed University, School of Clinical Dentistry, Tehran, Iran, and T. HOOSHMAND,
School of Dentistry/Research Center for Science and Technology in Medicine, Tehran University of
Medical Sciences, Tehran, Iran
Objectives: The aim of this study was to compare 2 commercially available human
and animal derived bone grafts to augment partially edentulous human bone prior
to implant placement for those volunteers with insufficient host bone.
Methods: According to the exclusion and inclusion criteria, 12 healthy volunteers
(6 in each group) who accepted our protocol and consented for the study were
selected. Similar or identical bone particle sizes were selected from the two products,
namely Bio-Oss™ (as an animal derived bone) and Faraz-Kish™ (as a human derived
bone), in each surgical approach to augment the partially edentulous areas that had
insufficient width or height for placing implants of 10 mm or more. The decision
of bone quantity was based on the cone beam computerized tomography (CBCT)
obtained in one center by only one radiologist. One edentulous area for each patient
on the same jaw was left non-grafted to act as a control group and one edentulous
area was grafted with one material for comparison. Xenograft and allograft groups
were compared with each other and with their corresponding control groups using
before and after values reported on the digital CBCTs.
Results: To obtain post grafting results, 6 months laps’ period was considered as
a proper time before the grafted area was subjected to control CBCT. This and the
number of subjects necessary to draw a conclusion took 3 years for the study to
complete. Data were analyzed using Kruskal-Walis test and the level of significance
was set at P<0.05. The results showed significant differences between the grafted
and non-grafted areas. Comparison between the xeno and allografts also showed
significant differences in the amount of bone obtained after grafting.
Conclusions: Human derived bone grafts showed better bone quality and quantity
after 6 months of grafting as opposed to animal derived bone substitutes.

9th
Iranian & 13th
48
182850
Bone Debris vs. Allografts in Repairing Implant Buccal Bone Dehiscence
A. PARHIZ, and M. JAFAR GHOLIZADEH, Tehran University, Tehran, Iran
Objectives:Assessmentofsuccessrateofuseofbonedebrisandallograftbiomaterial
in reducing gingival complications in implants in which some threads are exposed.
Methods: In this randomized clinical trial, 17 patients (9 male, 8 female) and 30
implants, with collar thread exposure, were entered. Patients with systemic disease
(even controlled disease) and poor oral hygiene were excluded. Selection of grafted
material for each patient was done randomly using flash cards. After implantation and
putting the grafted material on the exposed threads, a collagen membrane was put on
it and the surgical site was sutured tightly. In 14 implants bone debris was used and in
16 implants allografts (DBA+MBA, TBI) to cover the exposed threads. The second stage
was done at least 2 months later. To save the keratinized gingiva, the tissue punch was
not used. Three and 12 months after cementing the crown, three clinical complications
were assessed: Collar exposure, Thread exposure, Metal shadow
Results: Data were analyzed using SPSS software, Pearson Chi-square test, and
Fisher’s Exact test. In the first follow-up there was no complication. In the second
follow-up, there was thread exposure in three implants (18.8%) of allograft group
which was not seen in the bone debris group. However, these differences were not
statistically significant (P=0.228). There was metal shadow in two implants (14.3%)
of bone debris group after 12 months while it was seen only in one implant (6.3%)
of allograft group. This difference was not statistically significant (P=0.586). Collar
exposure was seen in seven implants (50%) of bone debris group and (43.8%) of
allograft group. This difference was not significant either.
Conclusions: Although results of using bone debris and allograft had no statistical
difference, in 14 (46.6%) implants one of the mentioned complications arose.

9th
Iranian & 13th
49
182855
Role of Titanium Mesh in Reconstruction of Ridge Deficiencies
O. MOGHADDAS, Islamic Azad University, Dental Branch, Tehran, Tehran, Iran
Objectives: Sufficient quality and quantity of bone is mandatory for achieving success
in implant dentistry from biomechanical and esthetic points of view.
Methods: 25 patients (16 male, 9 female) with horizontal and vertical deficiencies
enrolled in this study. Titanium mesh plus freeze-dried bone allograft (FDBA) were
utilized to augment the deficient areas. Evaluations were done at baseline (pre-op)
and 8 months after, during a reentry surgery for implant placement with periodontal
probes and caliper. Independent t-test was used to compare the differences.
Results: Bone graft materials were almost completely incorporated with the vital
bone and mean gain in width of 4.6 mm and in height of about 3.2 mm were achieved.
Conclusions: Utilizing titanium mesh with low turnover rate bone grafts is a good
alternative with great tissue compatibility, low risk of contamination and easy
handling, especially in advanced cases.

9th
Iranian & 13th
50
182883
Reverse Contrast Digital Radiography in Root Fracture Diagnosis
F. FARSHCHI, Azad Dental University, Tehran, Iran
Objectives: The purpose of this study was to evaluate the diagnostic precision of
reverse contrast option from Cygnus Ritter CCD Intra-oral Digital sensor, compared
to original digital radiographs, in detection of vertical root fracture.
Methods: 100 extracted single-rooted human teeth (50 non-fractured and 50
fractured) were placed singly in a skull socket. The radiographs were taken in 2
methods: Digital radiographs using a Cygnus Ritter CCD sensor and then reverse
contrast option was applied to the original radiographs. 2 maxillofacial radiologists
and an endodontist observed the original digital radiographs and their reverse
contrast option counterparts to detect vertical root fractures and recorded them
in a 5-grade scale. The data were analyzed with a proportion test and processed
with SPSS 14.
Results: Statistical analysis showed a sensitivity of 84.7% with CI: 95% for the Reverse
contrast option to detect vertical root fractures (P>0.05). The specificity was shown
as 61.3% (P>0.05). The Positive Predictive Value was calculated as 77.8% (P>0.05)
and Negative Predictive Value as 68.6% (P>0.05).The Accuracy was 73% (P>0.05)
Conclusions: The Reverse contrast option of Cygnus Ritter CCD Sensor did not show
a significantly higher diagnostic accuracy compared to original digital radiographs
made with that sensor.

9th
Iranian & 13th
51
182884
The Effect of OTC Bleaching Products on Enamel Microhardness
N. NOURBAKHSH1
, E. JAFARPOUR1
, and S. NEMATI ANARAKI2
, 1
Islamic Azad Dental university of
Tehran, Tehran, Iran, 2
Islamic Azad Dental university, Tehran, Iran
Objectives: OTC bleaching materials which have been accepted in society may affect
properties of enamel microhardness. The aim of this study was to compare the effect
of three kinds of OTC bleaching materials (White strip, paint on, and toothpaste) one
enamel microhardness of human third molar before and after bleaching treatment.
Methods: In this experimental study of enamel specimens, 45 freshly extracted
human third molar were prepared and divided in to three groups of white strips,
paint on, and toothpaste. Each material was used according to the manufacturers
(Crest and Rapidwhite) instructions. Vickers microhardness test was performed for
all groups. Data were analyzed by repeated measure ANOVA and LSD test.
Results: Microhardness values of white strips, paint on, and tooth paste groups
before and after bleaching treatment were 305.60±51.70 and 289.20±54.24/286.53
±62.10&276.13±61.75/256.60±39.77&253.06±38.62, respectively. One-way ANOVA
showed significant differences among three OTC groups (P<0.001). There was also
significant difference among the value of enamel microhardness before and after the
bleaching in each group (P<0.001).
Conclusions: Whitening OTC products affect enamel microhardness. White strips and
paint on decreased the microhardness more than whitening toothpaste. Consumers
should be aware of these OTC products side effects and use them conservatively.

9th
Iranian & 13th
52
182902
Effect of GC Tooth Mousse and MI Paste Plus on Dental Plaque Acidity
H. HESHMAT, Department of Restorative Dentistry and Dental Materials, Islamic Azad University
Dental Branch, Tehran, Iran, Tehran, Iran, H. ABDIAN, Dentist, Tehran, Iran, and F. FARAJI, School of
Dentistry,Islamic Azad University.Tehran.Iran, Tehran, Iran
Objectives: Reduction in plaque pH after consuming sugary materials is effective in
dissolving minerals on enamel surface. Casein phosphopeptid-Amorphous Calcium
Phosphate (GC Tooth Mousse), is a paste with available type of Calcium Phosphate
rather than ions of calcium and phosphate that is in the saliva. The new composition
of this paste called MI Paste Plus is presented with 900 ppm fluoride (CPP-ACPF).
Utilizing this paste can help neutralize the pH of bacterial plaque. In this study the
effect of CPP-ACP and CPP-ACPF were evaluated on neutralizing the plaque pH during
different times.
Methods: This clinical study has been done on 40 students. Plaque acidity (pH)
at distal of first molar were evaluated before and 10 minutes after 10% sucrose
consumption. In the next step, CPP-ACP and CPP-ACPF pastes were used as directed
on tooth surface. Plaque pH was assessed 30 and 60 minutes, 24, 48, 72 and 96
hours after application, data were recorded and analyzed by Repeated Measure
ANOVA statistical method (P<0/05) .
Results: Both CPP-ACP and CPP-ACPF increased plaque pH levels, identically for the
first 48 hours. The pattern differed after this period.
Conclusions: The effect of CPP-ACP and CPP-ACPF were identical until 48 hours, but
CPP-ACPF can be increased the pH until 96 hours.

9th
Iranian & 13th
53
182903
Porcelain Laminate Fracture Resistance on Incisal Reduction less than 2mm
E. AMINSALEHI, K. SAATI, A. DARNAHAL, and S. NEJAD KARIMI, Islamic Azad University Dental
Center, Tehran, Iran
Objectives: In the past decade, the demand for more durable and esthetic anterior
restoration like porcelain laminate veneer has increased. The main reason for
failure in this treatment is porcelain fracture. Therefore, tooth preparation plays an
important role in fracture resistance of porcelain laminate veneer. Obviously proper
choice of incisal reduction is an important factor to increase fracture resistance.
The aim of this in vitro study was to evaluate the fracture resistance of porcelain
laminate veneer dependent on the size of incisal reduction at less than 2 millimeter.
Methods: In this experimental study, 40 caries-free maxillary central incisors were
divided into four groups (n=10). While the control group remained unprepared, in
the second, third, and fourth groups the preparation included 1 mm, 1.5 mm and
2 mm of incisal edge respectively. 30 feldespatic ceramic veneers were bonded by
light cure luting cement (Choice 2). After that, specimens were loaded by universal
testing machine under increasing force (1 mm/min cross head speed – 135 force
angle degree) 0.5 mm lower than incisal edge until fracture was accrued. Finally,
fracture loads were recorded on newton unit.
Results: The mean fracture forces for control, 1 mm, 1.5 mm and 2 mm groups were
1089.4±276.49, 921.56±399.78, 894.46 ± 538.35, and 877.28±371.5 respectively.
Besides, cohesive fracture in second, third, and fourth groups were 6, 6, and 4
respectively. Also, adhesive fractures (between cement and porcelain) were 1, 1, and
2 and adhesive fractures (between cement and tooth) were 3, 2, and 3 respectively.
However, in third and fourth groups one crack in porcelain without fracture was seen.
Conclusions: Under limitations of this study from fracture resistance point of
view there was no significant difference between control group and the three
other groups (P>0.05).

9th
Iranian & 13th
54
182909
Effect of Fluoride and Chlorhexidine Varnishes on Interproximal Plaque pH
S. BANAVA1
, S. ASKARZADEH2
, D. NIKNAM3
, and S. ABDOLLAHZADEH2
, 1
Islamic Azad University
Dental Branch, Tehran, Iran, 2
Dental Branch , Islamic Azad University, Tehran, Iran, 3
Islamic Azad
University Dental Center, Tehran, Iran
Objectives: Dental plaque characteristics are responsible for occurrence of dental
caries. If the plaque pH reduces to 5.2-5.5 the demineralization procedure will start.
Increasing the plaque pH could be effective on slowing down the demineralization
process. The aim of this clinical study was to evaluate the effect of fluoride and
chlorhexidine varnishes on plaque pH of children aged 2-15 years old.
Methods: In this triple-blind randomized controlled clinical trial 46 children aged
2-15 who met the inclusion criteria entered the study and were divided into
two age groups of 2-6 and 6-15 by Stratified Randomization. Participants were
randomly allocated in the three following groups: Group 1 (Control): No varnish
application, Group 2: Chlorhexidine varnish (Cervitec Plus, Ivoclar V), and Group 3:
Fluoride varnish (Fluor Protector, Sultan Healthcare Inc, USA). In the first session,
the baseline pH of inter-proximal dental plaque of all participants was measured
by pH Plaque Indicator Kit (GC America, USA) and then the related varnishes were
applied according to the manufacturer instructions in each group. The application of
varnishes was done by dental floss into the proximal surfaces. After 1 and 3 months,
the interproximal plaque pH was measured again. The data were analyzed by Kruskal
wallis test and set to 0.05.
Results: Statistical analysis showed that once application of none of the varnishes
could change the interproximal plaque pH significantly in different groups and
different times (P>0.05).
Conclusions: Applying fluoride varnish or chlorhexidine varnish did not cause any
changes in the interproximal pH plaque in different groups in comparison to the
control group. Varnish application of more than once is recommended and needs
further research.

9th
Iranian & 13th
55
182913
The Role of HIV Infection on Oral Pigmentation
S. LESAN, M. SADAT KHODAEI, M.A. OUSIA, A. AZIZI, and A. NAJAFPOUR, Islamic Azad
University,Dental branch,Tehran,Iran, Tehran, Iran
Objectives: Diffuse or Multifocal Mucocutaneous pigmentation has been frequently
described as a clinical feature of HIV+/AIDS person. The purpose of this study was
to determine the role of HIV+/AIDS on oral pigmentation in Tehran Imam Khomeini
hospital’s patients and their control group during 2009-2010.
Methods: In this historical cohort study (cross sectional study) 35 HIV+ patients (case
group) and 35 HIV- patients (control group) who referred to the infectious, surgery,
or gynecology department of Tehran Imam Khomeini hospital were examined and
evaluated. Both groups were matched for age, sex, cigarette smoking, alcohol
consumption, OCP using, and pregnancy. The study was done by observation, clinical
examination, and interviewing the patients in addition to reviewing their medical
files and completing the questionnaire. Oral pigmentation was recorded. The data
were analyzed by chi-squared, exact fisher test.
Results: In this study 70 individuals were examined which were equally divided into
case and control groups. The prevalence of oral pigmentation was 22.9% (N=8) in
the case group and 17.1% (N=6) in the control group. The prevalence of melanin
pigmentation in control group was less than healthy individuals but there was no
statistically significant difference between the case and control group (P=0.5).
Conclusions: Since there was no significant difference in oral pigmentation in HIV+
and HIV- patients, it can be concluded that in this study, HIV infection does not have
any role on oral pigmentation.

9th
Iranian & 13th
56
182923
Clinical Effectiveness of Laser on Postoperative Hypersensitivity
H.-. MOOSAVI1
, F.-. MALEKNEJAD2
, M.-. SHARIFI1
, and F.-. AHRARI1
, 1
Dental Materials Research
Center, Mashhad, Iran, 2
Dental Material Research Center, Mashhad, Iran
Objectives: Postoperative hypersensitivity may be one of the drawbacks of every
tooth operation. The aim of this study was to evaluate the efficacy of Indium Gallium
Aluminum Arsenide Phosphate laser on postoperative hypersensitivity in cervical
lesions.
Methods: In this randomized controlled clinical trial, 31 patients were included.
Teeth were assigned randomly two groups of with or without irradiation by laser. In
the experimental group the same clinical procedure was used as the control group,
except applying laser emission before filling. Self-etch adhesive; Clearfil SE Bond,
was applied and cavities restored with composite resin; Clearfil APX. Preoperative
and 1-day, 2-, and 4-week-postoperative hypersensitivity were recorded for both
groups using an 11-point visual analog scale filled out by subjects. The analyses were
conducted to determine whether any correlation or association existed between
with or without laser irradiation during several follow-ups. Data were analyzed by
Wilcoxson and Friedman test.
Results: Laser irradiation had a significantly higher desensitizing effect compared
with the control group after treatment. Significant differences were observed
between the laser and control groups at every follow-up examination. For the laser
and control group, the differences between baseline and all time points following
the treatment were statistically significant.
Conclusions:Laserirradiationisaneffectivemethodinthereductionofpostoperative
sensitivity compared with non-irradiated treatment.

9th
Iranian & 13th
57
182924
Degree of Conversion of Low-Shrinkage Composites Photo-Activated by LED and
Halogen
T. HOOSHMAND, School of Dentistry/Research Center for Science and Technology in Medicine,
Tehran University of Medical Sciences, Tehran, Iran, K. FAMILI, School of Dentistry, Tehran University
of Medical Sciences, Tehran, Iran, and A. KESHVAD, Shahed University, School of Clinical Dentistry,
Tehran, Iran
Objectives: To assess and compare the degree of conversion and micohardness of
different resin-based restorative materials consisting of conventional methacrylate-
based, silorane-based, and new urethane dimethacrylate-based composites as a
function of light curing units (Quartz-Tungsten-Halogen (QTH) and Light Emitting
Diode (LED)).
Methods: To obtain the specimens, a circular matrix of stainless steel was used.
Composite materials (Tetric Nceram, Filtek Silorane and Kalore GC) were put into the
mold and pressed under 500 gr siker. The specimens were cured by either Bluephase
LED for 20 s, or Coltolux halogen for 40 s. Degree of conversion was measured
using FT-IR spectroscopy. Vickers microhardness of top and bottom surfaces was
also evaluated. To compare the degree of conversion and microhardness between
composites, Kruskall-Wallis test and pairwise comparison were used. Mann-Whitney
U test was used for comparison of efficacy between the two light curing units.
Results: The degree of conversion or microhardness between bottom and top
surfaces of all test groups were significant (P<0.05). The degree of conversion or
microhardness for all the specimens polymerized by LED was significantly higher than
that of halogen (P<0.05). Filtek Silorane exhibited a better degree of polymerization
compared with that of other composites polymerized either by QTH or LED light
(P<0.05).
Conclusions: Silorane-based composite showed a better degree of polymerization
than that of other methacrylate-based composites. The degree of conversion and
Vickers microhardness were affected by the type of resin composite material, light
curing units, and curing depths.

9th
Iranian & 13th
58
182926
Investigation of Implant Width on Distribution of Stress in Adjacent Bone
E. JAFARPOUR1
, N. NOURBAKHSH1
, and E. JALALIAN2
, 1
Azad university of dentistry of Tehran, Tehran,
Iran, 2
Islamic Azad University Dental Center, Tehran, Iran
Objectives: Implant width has a significant role in distribution of stress and many
different studies have suggested different outcomes. The purpose of this study was
to determine the optimum width of implant for distribution of stress.
Methods: The current experimental research was implemented using photo elastic
method with wide variety of implant width including 3.3,3.7,5,6, 3.5 mm and similar
length equal to 10 mm. Plexiglass block with the same length and height of 33.5 and
35 mm and different width of implant were prepared so as there would be 1.5 mm
width around each implant. They were placed under the force of 157 and 65 N in 90
and 30 degree angles respectively by photo elastic device. The obtained images were
assimilated using Photoshop 650 x 760 and evaluated by image.
Results: Using the image J software colored analyzed images were obtained.
The analysis procedure was based on three color (red –white –blue) separation
technique. Three color separations resulted in a more investigation of spots which
later categorized into stress focused, stress free and modest stress groups. The
highest amount of stress focus was associated to 6 mm depth, 30 degree angle and
under 100 N force with partial fraction of ¼ or 25/100 and the lowest amount of
stress focus was associated with 3.7 mm depth, 90 degree angle and under the N
force.
Conclusions: With the increase of implant depth from 3.2 to 5 mm, the stress amount
of adjacent bone decreased and with increase in stress occurred. In the case of using
higher depth, the optimum depth seems to be 5 mm.

9th
Iranian & 13th
59
182929
Quality Assessment of the Information Related to Fissure Sealant
F. NILCHIAN, School of Dentistry, Isfahan University of Medical Sciences, Esfahan, Iran, and L.
GHASEMI, University of Isfahan, Isfahan, Iran
Objectives: The aim of this study was to evaluate the quality of information related
to pit and fissure sealant in general Persian Internet websites.
Methods: In this cross-sectional study, by searching in Google engine, the websites
providing information about fissure sealant were found. The key words were “patient
education and fissure sealant”, checked by MeSH database. From 500 initial links, the
inadequate ones were eliminated according to exclusion criteria, and 37 websites
remained. These websites were evaluated through a checklist designed by the
researchers, the validity and reliability of which had been evaluated and confirmed.
Results: The average score of the quality of information was 22.46. The minimum
and maximum of obtained scores were 16 and 30, respectively. The total and ideal
number was 38.
Conclusions: Overall the quality of information related to fissure sealant in general
Internet sources was good, yet they did not cover the entire required information
which could be improved. The main problem of information was that they did not
provide creditable/credible and up-to-date sources.

9th
Iranian & 13th
60
182944
Formulation of New Mucoadhesive Containing Phenytoin on Wound Healing
S. ALIREZAEI, resident, tehran, Iran, and M. BAHARVAND, Shahid Beheshti University of Medical
Sciences, Tehran, Iran
Objectives:Severalstudieshaveshownthewoundhealingeffectoftopicalphenytoin,
which is applied by its effect on connective tissue intracellular matrix. However, there
are still some controversies about its effect on various kinds of wounds. This study
evaluated the effect of mucoadhesive paste compared to phenytoin mucoadhesive
paste on wound healing after oral biopsy. The importance of this study is that no
systemic treatment is used; therefore, side effects of such a treatment.
Methods: This study was a randomized double blind clinical trial. Parameters
included age, gender, tissue inflammation, degree of pain, and size of the ulcer. After
entering the study, patients were randomized into two groups. Both groups had oral
biopsy ulcers ranging between one and two centimeters. Patients in the first group
were treated by simple mucoadhesive paste, while patients in the second group
were treated by phenytoin mucoadhesive paste. Both pastes were applied for 5 days
after the biopsy. Statistical analysis was done using Mann-Whitney test.
Results: After the second and third appointments, it was observed that the rate of
wound healing and decrease in the size of the ulcers were significantly quicker in
the second group (P=0.001 and P=0.003 respectively) and the patients in the second
group reported less pain. Diameter of the inflammatory halo was not significantly
different between the two groups.
Conclusions: Applying phenytoin mucoadhesive paste on biopsy ulcers resulted in
accelerated wound healing and decrease in pain, but had no effect on the diameter
of the inflammatory halo.

9th
Iranian & 13th
61
182961
Residual Root Thickness Evaluation after Pre-Flaring Using Gates Glidden Drills
N. MOHAMMADZADEH AKHLAGHI1
, A. NAGHDI2
, L. MOHAMMADIAN2
, and E. BEHROUZ2
, 1
Islamic
Azad University Dental Branch, Tehran, Iran, 2
Islamic Azad University Dental Center, Tehran, Iran
Objectives: To evaluate the residual root thickness in mesiolingual (ML) canals of
mandibular molars after pre-flaring using different sequences of Gates-Glidden (GG)
drills.
Methods: Computed tomography (CT) scans of the ML canals of 60 mandibular first
molars were provided from areas within 1, 2, 3, and 4 mm of the furcation area and
minimum initial root thickness (MIRT) of concave areas was measured at each level.
The samples were divided into two groups (G1 and G2) which were prepared by the
step-back and crown-down techniques, respectively. In both groups, anti-curvature
filing was used. On secondary CT images of the samples in the same position, the
minimum residual root thickness (MRRT) and the amount of removed dentin were
analyzed by t-test and ANOVA.
Results: There was no significant difference for MIRT between the two groups.
The MRRT was greater in the G2 group in all the sections, with no significant
difference between them. The average of MRRT was not less than 0.5 mm in any
of the groups or sections.
Conclusions: Based on the results of this study when the root thickness is appropriate
at first, GG drills used in any sequence may be suitable, safe, and cost effective for
pre-flaring of mesial canals of mandibular first molars with preserving the root
thickness of furcation areas.

9th
Iranian & 13th
62
182962
Effects of bonding agent and sealant viscosity on sealant microleakage
S. SADEGHI, Assistant professor, Department of Orthodontics, Kerman Dental School, Kerman
University of Medical Sciences, Kerman, Iran, F. MAZHARI, Associate professor, Department of
Pediatrics, Mashhad Dental School, Mashhad University of Medical Sciences, Mashhad, Iran, and M.
MEHRABKHANI, Assistant professor, Department of Pediatrics, Mashhad Dental School, Mashhad
University of Medical Sciences, Mashhad, Iran
Objectives: Pit and fissures are susceptible to caries and this accounts for
approximately 80-90% of all permanent posterior teeth decay. Sealant placement
culminates in a 80% caries reduction after one year. An issue of concern in dentistry
is proper sealing following sealant placement. The purpose of this study was to
evaluate the effect of enamel bonding agent, dentin bonding agent, and sealant
viscosity on sealant microleakage occurrence.
Methods: 60 extracted human premolars were randomly divided into two equal
groups and each group was divided to three subgroups of 10 teeth. In Group 1,
Subgroup 1 after prophylaxis, enameloplasty, etching of occlusal surfaces with 38%
phosphoric acid gel, rinsing and drying, low viscosity sealant was applied and cured.
Group 1, Subgroup 2 received enamel bonding agent prior to low viscosity sealant
placement and cured. In Group 1, Subgroup 3 before low viscosity sealant placement,
dentin bonding agent was applied and cured. In Group 2 similar procedures were
performed except for applying high viscosity sealant. Specimens were thermocycled
for 500 cycles at 5°C and 55°C with dwell time of 10 second. Microleakage was
scored according to distance of dye penetration as: 0 = no dye penetration and 3 =
dye penetrates to underlying fissure.
Results: Statistical Analysis showed significant effect of sealant viscosity and bonding
agent on the microleakage scores (P=0.037). There was no significant difference
between dentin bonding agent and enamel bonding agent and no bonding agent
subgroups in the microieakage scores in both groups. Significant differences between
low viscosity sealant without applying bonding agent subgroup and high viscosity
sealant without applying bonding agent subgroup (P=0.041), and between dentin
bonding agent in low viscosity and high viscosity sealant subgroups (P=0.002) were
found.
Conclusions: The results of this study indicated that concurrent use of low viscosity
sealant and dentin bonding agent reduces the microleakage of pit and fissures.

9th
Iranian & 13th
63
182963
Accuracy of Two Radiographic Methods in Diagnosis of Root Resorption
A. MESGARANI, and M. EHSANI, Assistant Professor, Faculty of Dentistry of Babol, Babol, Iran
Objectives: The aim of the current study was to evaluate the diagnosis accuracy of
external root resorption with conventional intraoral film radiography, CCD sensor,
and PSP sensor.
Methods: This in vitro study was performed on 80 extracted human sound
premolars. Artificial external root resorption were simulated using 0.8 mm, 1 mm,
1.2 mm, and 1.4 mm diameter round burs by drilling to the entire depth at apical
half of the mesial, distal, and buccal surface. Two dosages of radiography were used
(0.16 and 0.08 second in the conventional radiography, 0.08 and 0.04 in the digital
radiography).Three observers (one radiologist and two endodontists) examined the
images. Data were statistically analyzed by SPSS 17 software.
Results: Higher proportion of correct reading were obtained with the CCD receptor
(P=0.39). The best results were obtained when surfaces were without resorption
(P=0.001).The observers detected more cases with increasing the dose of radiography
and the size of cavity.
Conclusions: The CCD sensor was better than conventional intraoral film radiography
and conventional radiography is better than PSP sensor in detecting external root
resorption, although, there is no significant difference.

Abstract Book92-9-12

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