tooth

1. Presented by :-
Samson S.
Samuel
1st year
Guided by:-
Dr. Fatima Saify
Dr. Nidhi Sharma
Dr. Kedarnath

2. Introduction -
Teeth :
* Hard structure
* Cutting and chewing food
* Embedded in socket
* Attached by periodontal ligament

3. CONDENSED :
DENTIN -
* Hard tissue elastic in nature
* Covered by enamel in the crown and by the
cementum in Root .
ENAMEL -
* Hardest tissue
* Acellular
* Shape and contour to the crown
Pulp –
* Vascular mesenchymal connective tissue
* center of the tooth within rigid dentinal walls

4. PARTS :
Crown -
Above cervical line of tooth
Root -
Below cervical line

5. FEATURES DECIDUOUD
TEETH
PERMANENT
TEETH
1. Duration 6 MONTH to 5 ½
years
6 ½ years on
wards
2. NUMBER 20 { 2 incisor, 1
canine , 2 molars
}
32 { 2 incisor, 1
canine , 2
primolars,
3 molars}
3.ENAMEL Thinner
( About 1 mm )
Thicker
( About 2-3 mm)
4. OCCLUSAL
PLANE
Relatively flat More Curved
contour
5. MAMMELEONS Absent Present
MORPHOLOGICAL FEATURES
CROWN

8. THE ROOT
FEATURES DECIDUOUS
TEETH
PERMANENT
TEETH
1. SHAPE Larger and more
slender
Shorter and
bulbous
2. ROOT TRUNK Smaller Larger
3. WIDTH Narrower
mesiodistally
Broader
mesiodistally
4.
PHYSIOLOGICAL
RESORPTION
During shedding
of tooth
Absent

10. THE PULP
FEATURES DECIDUOUS
TEETH
PERMANENT
TEETH
1.PULP
CHAMBER
LARGER SMALLER
2.ROOT CANALS MORE RIBBON
LIKE
[HOUR GLASS
APPEORANCE]
WELL DEFINED
WITH
LESS
BRANCHING
3.ACCESSORY
CANLS
PRESENT MAY BE ABSENT
4.CELLUARITY
AND
VASCULARITY
HIGH DEGREE LESS DEGREE
5.POTENTIAL HIGH POTENTIAL LOW POTENTIAL

12. HISTOLOGIC
DIFFERENCE
FEATURE
S
DECIDUOUS
TEETH
PERMANENT
TEETH
1.BLOOD
SUPPLY
Enlarged apical
foramens.
The abundent
blood supply
Restricted,
Reduced blood
supply
2.REPARATIVE
DENTIN
More Less
3.DENSITY OF
INERVATION
Less More
4.LOCALIZATION
OF INFECTION
poorer Better

14. FEATURES DECIDOUS TEETH PERMANENT
TEETH
1.DENTINAL
TUBULES
Less regular Most regular
2.DENTIN
FORMING
CELLS
Functionally
active by
approximately 360
days
Functionally
active
by 700 days
3.INTER
GLOBULAR
DENTIN
Absent Present
4.DENTIN Usually less
dense
Difficult to cut
DENTINE

16. FEATURES DECIDOUS
TEETH
PERMANENT
TEETH
1.ENAMEL AND
DENTINE
Less mineralized More mineralized
2.NEONTAL
LINES
present Only seen in first
Permanent molar
MINERAL CONTENT
FEATURES DECIDOUS TEETH PERMANENT
TEETH
1.BANDS OF
RETZIUS
Less common More common
ENAMEL

17. FEATURES DECIDOUS
TEETH
PERMANENT
TEETH
1.SECONDARY
CEMENTUM
Characteristically
absent
Present
2.ALVEOLAR
ATROPY
Rare occurs
3.GINGIVITIS Generally absent
in
healthy child
similarly
recession is
infrequent
Common in adult
PERIODONTAL LIGAMENT

19. REFERENCE ::
1. TEXTBOOK FOR PEDODONTICS BY SHOBHA
TANDON
2. PRINCIPLES AND PRACTICE OF PEDODONTICS
BY ARATHI RAO
3. WHEELER’S DENTAL ANATOMY PHYSIOLOGY
AND OCCLUSION
4. TEXTBOOK OF DENTAL AND ORAL HISTOLOGY
WITH EMBRYOLOGY BY SATISH CHANDRA
5. A.T. BIVI JI