seminar explain briefly the some of laser advantages

1. LASER IN DENSITY

2.  1960 – First Laser .
 1993 N.d: YAG Laser.
 1993 : Kinetic Cavity perparation.
 1994 : Co2 Laser , Aryon Laser.
 1996 : Laser Welder .
 1997 : Nd : YAP Laser .
 1998 : Er : YAG Laser.
History

3.  Laser is an acronym which stands for Light
implication By Stimulated Emission of Radiation.
 Light shows disc players
 Device that converts electrical / Chemical energy into
light energy .
In Introduction

4.  Light
 Implication by the Stimulated.
 Emission of
 Radiation .
Fundamental of laser .

5.  Farm of electromagnetic energy .
 Properties of Laser .
 Monochromatic .
 Collimation .
 Coherency .
L- Light

6.  Monochromatic – characterized by radiation in which
all waves are of same frequency and wavelength .
 Collimated : all the emitted waves are parallel and the
beum divergence is very low .
 This property is very important for good transmission
through delivery Systems.

7.  Coherency : Is a single or just a few frequencies going
in one precise direction .
 A – Implication
 Intense beam of light can be created . The Laser may
be activated by a few photons which than act to
produce many more , and initial light generated is
computed to make a very bright compact beam.

8.  If an atom in the excited state is struck by a photon of
identical energy as the photon to be emitted , the
emission could be stimulated to occur earlier than
would occur spontaneously .
 This stimulated interaction causes two photons that
are identical that are identical in frequency and
wavelength to leave the atom.
S-Stimulated E-Emission

9.  A laser medium or active medium-solid liquid or gas .
 Housing tube or optical cavity .
 External power source-pumps .
Laser Design

10. Based on wave length
A soft laser B- Hard
laser
 Based on the type of active lasing medium used .
 ArF exrimer , KrF excimer , XeCL excimer , Argon ion ,
Nd . YAG , Er : YAG , CO2 .
Laser types

11.  Four different interaction
 Reflection .
 Scatter .
 Absorption .
 Transmission .
Laser interaction with biologic
tissues

12.  Incision .
 Excision .
 Ablation .
Processes

13.  No anesthesia , no drill .
 Less blood loss , less pain .
 Reduce post-operative edema .
 Early healing , rapid regeneration , reduce post
sensitive in restorations .
 Less chances of metastasis .
 Sterilization of treatment site- no infection.
Advantages

14.  Fill cavities located between teeth .
 Cavities around old filling or silver fillings and large
cavaties . (Crown).
 Remove definition crown or silver fillings .
 Prepare for bridges .
 Laser- more expensive .
Disadvantages

15.  Prevention of caries
 Detection of incipient caries .
 Cavity preparation .
 Enamel etching .
 De sensitization.
 Pulpotony
 Removed of old restoration –gold , ceramic.
 Root canal therapy .
 T.M.J treatment:
 Reduce pain and inflammation .
Hard tissues

16.  Frenectomy
 Toney tie
 Incisional and excisional biopsies .
 Inflammatory papillary hyperplasia .
 Aphthous ulcer .
 Removed of malignant lesions .
 Operculectomy .
 Implants – Stage II – at the time of recovery .
Soft tissues

17.  A gingivectomy is a periodontal surgery that removes
and reforms and reforms diseased gum tissue or
other gingival built up.
 Performed in a dentist's office , the surgery is
primarily done one quadrant of the mouth at the time
under anesthetic .
 Co2 laser with wavelength of 10.600 nm .
Laser gingivectomy

18.  The small flexible fiber-optic hand pieces or tip must
be steam sterilized in sterilizing pouches .
 Use of protective wear .
 Use of screen & curtain should be promoted .
 Use of proper clothing .
 Use of anti fire explosive .
 Proper training and causes .
Laser hazard control measures

19.  Laser – alternative to conventional surgical Systems .
 Laser are “a new and different scalped” (optical Knife
, light scalped ) .
Conclusion