Tooth morphology and Intra oral anatomy

TOOTH MORPHOLOGY AND
INTRA-ORAL ANATOMY

Chinthamani Laser Dental Clinic

TOOTH MORPHOLOGY AND
INTRA-ORAL ANATOMY
Objectives:
1. Terminal Learning objective
Given the appropriate information,
identify the basic facts and
characteristics pertaining to the
structure of the oral cavity with
70% accuracy.

2. Enabling Learning Objectives
a. Given the appropriate information,
identify the basic facts and characteristics
of the dentition with 70% accuracy.
b. Given the appropriate information,
of the gingiva and tongue with 70%
accuracy.

2. Enabling Learning Objectives, cont’d
c. Given the appropriate information,
of the saliva and salivary glands with 70%
accuracy.
d. Given the appropriate information,
of the nerves with 70% accuracy.

A. Dentition

1. Tooth embryology
a. Growth period - tooth bud

forms, enamel

b. Period of calcification - hardening of
tooth through deposition of calcium
and mineral salts.
c. Period of eruption
(1) Calcified tooth begins to move
into functional position
(2) Continues throughout lifetime
of tooth

2. COMPOSITION AND FUNCTION
a. ENAMEL- MAKES UP ANATOMIC
CROWN, OUTER LAYER

(1) TRANSLUCENT SUBSTANCE
COVERING ENTIRE CROWN

a. ENAMEL CONT’D
(2) RANGES IN COLOR FROM
YELLOWISH TO
GRAYISH
WHITE COLOR
(3) HARDEST MATERIAL IN THE

a. ENAMEL CONT’D
(5) ENAMEL IS ABLE TO WITHSTAND
CRUSHING STRESSES OF ABOUT
100,000 psi.
(6) INCAPABLE OF REMODELING
AND REPAIR

b. DENTIN - MAKES UP BULK OF TOOTH
(1) COVERED BY ENAMEL ON CROWN
AND CEMENTUM
ON THE ROOT

(2) PALE YELLOW/SOMEWHAT

b. DENTIN CONT’D
(5) SENSATION CARRIED VIA TINY
CANALS CALLED DENTINAL
TUBULES
(6) SECOND HARDEST MATERIAL
IN THE HUMAN BODY

b. Dentin cont’d
(7) CAPABLE OF LIMITED
REGENERATION (SECONDARY
DENTIN)REPARATIVE
REGENERATION BY PULP

c. CEMENTUM
(1) PRIMARY FUNCTION - ANCHOR
TOOTH TO BONY
SOCKET VIA MEANS
OF ATTACHMENT FIBERS

c. Cementum cont’d
(4) THIRD HARDEST MATERIAL
IN THE HUMAN BODY
(5) INSERTION AREA OF

PERIODONTAL LIGAMENTS

d. PULP-SOFT TISSUE AT CENTER OF
TOOTH AND IN THE PULP CANAL
(1) BLOOD VESSELS
(2) NERVES
(3) LYMPH

d. PULP-SOFT TISSUE AT CENTER
OF TOOTH CONT’D
(4) CONNECTIVE TISSUE
CONSISTS OF:
(a) CELLS
(b) INTERCELLULAR SUBSTANCES
(c) TISSUE FLUIDS

3. ANATOMY OF THE TOOTH
a. ANATOMIC CROWN- PORTION OF

TOOTH COVERED WITH ENAMEL
b. CLINICAL CROWN- VISIBLE

3. ANATOMY OF THE TOOTH CONT’D

c. ROOT- PART OF TOOTH COVERED
BY CEMENTUM, BELOW GUMLINE
AND SEATED IN THE ALVEOLAR
PROCESS (BONY SOCKET)

3. ANATOMY CONTINUED...
d. CEMENTO-ENAMEL JUNCTION (CEJ)

(CERVICAL LINE) - WHERE THE
ANATOMIC CROWN

AND ROOT MEET
e. APEX- TIP OF ROOT

3. ANATOMY CONTINUED...
g. PULP CHAMBERCONTAINS PULP IN
CROWN
h. PULP CANAL- CANAL
RUNNING FROM APICAL
FORAMEN TO THE PULP
CHAMBER

4. SUPPORTING STRUCTURES
OF THE TEETH
a. ALVEOLAR PROCESS
(1) DEFINITION - PART OF THE

MAXALLE AND MANDIBLE

4. SUPPORTING STRUCTURES Cont’d
(2) FUNCTION - SURROUNDS
ROOTS AND SUPPORTS THE
TEETH
(3) COMPOSITION - COVERED BY
DENSE BONE OUTSIDE,
CANCELLOUS (porous) BONE
INSIDE

b. PERIODONTALLIGAMENTS
(1) DEFINITION - FIBROUS TISSUES

THAT ATTACH TEETH TO THE
ALVEOLAR BONE


c. GINGIVA - SURROUNDS THE
TEETH AND COVERS THE
ALVEOLAR PROCESS

5. PERMANENT TEETH
a. QUANTITY- 32
b. CAN BE DIVIDED INTO:
(1) ARCHES - MAXILLARY

& MANDIBULAR

4. PERMANENT TEETH CONT’D
b. QUADRANTS
(1) MAX RIGHT, MAX LEFT
(2) MAND LEFT, MAND RIGHT

4. PERMANENT TEETH-CON’T
(3) SEXTANTS (SIX SEGMENTS)
(a) MAXILLARY RIGHT

POSTERIOR
(b) MAXILLARY
ANTERIOR

(3) SEXTANTS- SIX SEGMENTS
(d) MANDIBULAR RIGHT POSTERIOR
CONT’D
(e) MANDIBULAR ANTERIOR,
(f) MANDIBULAR LEFT POSTERIOR

4. PERMANENT TEETH
CONT’D
c. EACH QUADRANT CONTAINS ONE
OF EACH TOOTH TYPE:
(1) CENTRAL INCISOR
(2) LATERAL INCISOR
(3) CUSPID (CANINE)

4. PERMANENT TEETHCONT
(4)
(5)
(6)
(7)
(8)

1ST BICUSPID
2ND BICUSPID
1ST MOLAR
2ND MOLAR
3RD MOLAR
(WISDOM TOOTH)

(d) NUMBERING SYSTEM
(1) MAXILLARYPATIENT’S
1

32
RIGHT TO LEFT #’S 1-16;

16
17

5. DECIDUOUS TEETH
a. QUANTITY- 20
b. EACH QUADRANT CONTAINS a-(1) CENTRAL INCISOR
(2) LATERAL INCISOR
(3) CUSPID
(4) 1ST MOLAR
(5) 2ND MOLAR

6. SURFACES AND LANDMARKS

a. OCCLUSION - CONTACT BETWEEN
MAXILLARY & MANDIBULAR TEETH
b. SURFACES OF TEETH

b. SURFACES OF TEETH CONT’D
(1) FACIAL - NEXT TO CHEEKS & LIPS
(a) LABIAL- ANTERIOR FACIAL
(b) BUCCAL - POSTERIOR FACIAL
(2) LINGUAL- NEXT TO TONGUE


(3) MESIAL- TOWARD MIDLINE
(MIDLINE - IMAGINARY LINE
BETWEEN CENTRAL
INCISORS.

(4) DISTAL- AWAY FROM MIDLINE
(5) INCISAL- CUTTING EDGE OF

ANTERIOR TEETH

c. LANDMARKS
(1) PROXIMAL SURFACES- MESIAL
OR
DISTAL SURFACE OF A TOOTH
LYING
NEXT TO ANOTHER TOOTH

C. LANDMARKS CONT’D
(3) CUSPS- POINTED OR
ROUNDED ELEVATIONS OF
ENAMEL ON OCCLUSAL
SURFACES
OF CUSPIDS AND POSTERIOR
TEETH

C. LANDMARKS CONT’D

(4) BIFURCATED - TEETH
WITH TWO ROOTS
(5) TRIFURCATED TEETH WITH THREE
ROOTS

3. LANDMARKS CONT’D

(6) CINGULUM- BULGE OF
ENAMEL FOUND ON THE
CERVICAL THIRD OF THE
LINGUAL SURFACE OF
ANTERIOR TEETH

B. GINGIVA AND TONGUE
1. GINGIVA- MUCOUS
MEMBRANE
COVERING THE ALVEOLAR
PROCESSES AND ENCIRCLING
THE NECKS OF THE TEETH

2. TONGUE

a. MASS OF FLEXIBLE
VOLUNTARY MUSCLES
b. PAPILLAE (tiny projections) ON
DORSUM (top surface); CONTAINS
TASTE BUDS

C. SALIVA & SALIVARY GLANDS
1. SALIVA- ORAL DIGESTIVE FLUID

PRODUCED BY SALIVARY GLANDS
a. 2-3 PINTS/24 HOURS
b. PROVIDES SOME PROTECTION
AGAINST DENTAL CARIES

d. SOURCE OF FLUORIDE, CALCIUM,
PHOSPHATE FOR TOOTH
REMINERALIZATION
e. CLEANSING ACTION
f. LUBRICATION EFFECT FOR
SWALLOWING
g. BUFFERING OF ACIDS-REDUCES pH

2. SALIVARY GLANDS

a. PAROTID GLANDS
(1) LOCATIONIN CHEEK JUST
IN FRONT OF
EACH EAR
BILATERAL

a. PAROTID GLANDS CONT’D
(2) OPENING-EMPTIES INTO MOUTH
OPPOSITE MAXILLARY SECOND

MOLARS (STENSON’S DUCT)
(3) LARGEST SALIVARY GLANDS

b. SUBMANDIBULAR GLANDS
(1) LOCATION - BILATERAL, FLOOR OF

MOUTH, POSTERIOR PORTION OF

MANDIBLE (LINGUAL SURFACE)

c. SUBLINGUAL GLAND
(1) LOCATION - BILATERAL, FLOOR

OF MOUTH UNDER TONGUE
(2) OPENING - SERIES OF DUCTS

D. NERVES
1. TRIGEMINAL-

(FIFTH
CRANIAL

1. TRIGEMINAL
INNERVATION: TO SUPPLY WITH
NERVES, TO STIMULATE.
b. HAS THREE MAIN DIVISIONS

D. NERVES
(1) OPTHALMIC
DIVISION- GIVES
SENSATION TO
TISSUE AROUND
EYES AND
FOREHEAD
(INNERVATION)

D. NERVES
(2) MAXILLARY BRANCH- SENSORY
NERVE (SENSORY-CARRIES
IMPULSES FROM SKIN/
ORGANS TO THE BRAIN)
(a) INNERVATES
MAXILLARY
TEETH

1. TRIGEMINAL CONT’D

(b) FURTHER DIVIDED INTO MANY

SMALLER BRANCHES.
THREE
MAJOR BRANCHES ARE--

1 ANTERIOR SUPERIOR
ALVEOLAR- INNERVATES
MAXILLARY
INCISORS AND
CUSPIDS

2 MIDDLE SUPERIOR
ALVEOLAR- INNERVATES
MESIOFACIAL
ROOT OF THE

ILLARY

MAX
FIRST

1 TRIGEMINAL CONT’D
3 POSTERIOR SUPERIOR
ALVEOLAR- INNERVATES MAX
MOLARS
EXCEPT FOR
MESIO-FACIAL
ROOT OF THE
MAXILLARY
1ST MOLAR

(3) MANDIBULAR DIVISION
(a) SUPPLIES
SENSATION TO
ALL MANDIBULAR
TEETH AND TISSUE
(b) THREE MAJOR
BRANCHES

1 INFERIOR ALVEOLAR
NERVEINNERVATES THE
MAN TEETH,
MAN GINGIVA,
AND THE
LOWER LIP
UNILATERALLY

3 LINGUALINNERVATES
ANTERIOR 2/3
OF THE
TONGUE AND
MUCOSA ON
THE FLOOR
OF THE
MOUTH

3 BUCCALINNERVATES
THE BUCCAL
MUCOUS
MEMBRANES

2. FACIAL
SEVENTH CRANIAL NERVEMOTOR AND SENSORY IN
NATURE
MOTOR-CARRIES IMPULSES
FROM THE BRAIN AND SPINAL
CORD TO MUSCLES AND GLANDS

B. INNERVATES
(1) MUSCLES OF FACIAL

EXPRESSION
(2) TASTE BUDS ANTERIOR
2/3 OF TONGUE

SUMMARY


IDENTIFY BASIC FACTS AND CHARACTERISTICS
PERTAINING TO THE STRUCTURES OF THE ORAL
CAVITY, WITH 70% ACCURACY

DENTITION
 GINGIVA
 TONGUE
 SALIVA AND SALIVARY GLANDS
 NERVES


Thank You
Email.id:chinthamanidental@gmail.coml
044-43800059 , 92 83 786 776
www.chinthamanilaserdentalclinic.com

Tooth morphology and Intra oral anatomy

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