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

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

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

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

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”

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

MILK TEETH

PERMENANT TEETH TOTAL OF 32 ALL EXCEPT THE WISDOM TEETH ( LAST MOLAR) APPEAR BY THE END OF ADOLESCENCE WISDOM TEETH APPEAR BETWEEN 17-25 YRS

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

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

SALIAVARY GLANDS

SALIAVARY GLANDS

SALIAVARY GLANDS