1. DR VINIT K ASHOK ADJUNCT FACULTY
HEAD AND NECK
DR VINIT K ASHOK
ADJUNCT FACULTY

2. ORAL CAVITY
ALSO CALLED THE MOUTH. MUCOSA LINED.ENTRY INTO THE ALIMENTARY CANAL
BOUNDARIES-
ANTERIORLY-LIPS
LATERALLY-CHEEKS
SUPERIORLY-PALATE
INFERIORLY-TONGUE
ORAL CAVITY PROPER---LIES INTERNAL TO THE TEETH
EPITHELIUM ---THICK STRATIFIED SQUAMOUS----PROTECTIVE
SOME AREAS SHOW KERATIN

3. ORAL CAVITY
LIPS-( LABIA) + CHEEKS KEEP THE FOOD INSIDE THE MOUTH DURING MASTICATION( CHEWING)
BOTH HAVE SKELETAL MUSCLES
LIPS----ORBUCULARIS ORIS
CHEEKS---MAINLY THE BUCCINATOR MUSCLE
PALATE—FORMS THE ROOF OF THE MOUTH/SEPERATES THE ORAL AND NASAL CAVITIES
2 PARTS-----HARD/ SOFT
HARD—LIES ANTERIORLY MADE OF BONE. FOOD IS PUSHED BY THE TONGUE AGAINST IT
SOFT---LIES POSTERIORLY, MADE OF MUSCLE. CLOSES THE NASOPHARYNX DURING SWALLOWING

4. ORAL CAVITY TONGUE- OCCUPIES FLOOR OF THE MOUTH
MADE UP OF SKELETAL MUSCLE
FUNCTIONS
REPOSITIONS FOOD BETWEEN THE TEETH
MIXES FOOD WITH THE SALIAVA, FORMS BOLUS
PUSHES THE BOLUS INTO THE PHARYNX DURING SWALLOWING
SPEECH
CONTAINS TASTE BUDS
POSTERIOR PART CONTAINS LINGUAL TONSILS

6. SWALLOWING FOOD IS TAKEN INTO THE MOUTH( INGESTION)
IT IS PUSHED INTO THE PHARYNX BY THE TONGUE( VOLUNTARY PHASE ) OF DIGESTION.
PROPULSION IS THE INVOLUNTARY MOVEMENT OF FOOD THROUGH THE ALIMENTARY CANAL DUE TO “ PERISTALSIS”

7. TEETH LIE IN SOCKETS( ALVEOLI) UPPER ROW---LIE IN THE MAXILLA
LOWER ROW---LIE IN THE MANDIBLE
HELP IN MECHANICAL DIGESTION OF FOOD
TWO SETS DEVELOP IN HUMANS---
1) DECIDOUS( MILK) TEETH)
2) PERMENANT TEETH

8. MILK TEETH

9. PERMENANT TEETH TOTAL OF 32
ALL EXCEPT THE WISDOM TEETH ( LAST MOLAR) APPEAR BY THE END OF ADOLESCENCE
WISDOM TEETH APPEAR BETWEEN YRS

10. TOOTH STRUCTURE 2 REGIONS-CROWN /ROOT BOTH MEET AT THE NECK
ENAMEL COVERS THE CROWN
BULK FORMED ---DENTINE
PULP CAVITY-CENTER
ROOT CANAL- PART OF THE PULP CAVITY IN THE ROOT
ROOT –COVERED BY CEMENTUM
PERIODONTAL LIGAMENT HOLDS THE TOOTH IN PLACE

11. TOOTH STRUCTURE/ DISEASE
INCISORS- CHISEL SHAPED- NIPS PIECES OF FOOD
CANINE-CONE SHAPED-TEAR AND PIERCE
PREMOLARS( BICUSPIDS)-GRINDING
MOLARS-GRINDING
DENTAL CARIES- LOSS OF ENAMEL AND DENTIN DUE TO BACTERIA
DENTAL PLAQUE-SUGAR , BACTERIA AND OTHER DEBRIS ADHERING TO TEETH
GINGIVITIS- INFLAMMATION OF THE GUMS

12. SALIAVARY GLANDS

13. SALIAVARY GLANDS

14. SALIAVARY GLANDS