ANATOMY AND MORPHOLOGY OF TEETH

Introduction- lower and upper arch - maxillary and mandibular arch - mastication or comminution

General anatomy of mouth- alveolar process - bony sock or alveolus- anatomical crown - anatomical root - clinical crown - clinical root

-enamel - dentin - cementum - pulp - Pulp cavity : pulp chamber pulp canal pulp horns - cervical line/cervix/neck - dentino-enamel junction - periodontal ligament

- gingiva or gum

Classification of teeth

- heterodont- diphyodont deciduous

permanent

Permanent teethDeciduous teeth

Teeth : - incisors : 2 central and lateral- canine (cuspid) 1- premolars 2 - molars 3

Eruption of deciduous teeth 1- central incisor2- lateral incisor 3- first molar4- canine

5- second molar

Eruption of permanent teeth 1- first molar 2- central incisor3- lateral incisor4- first premolar 5- canine 6- second premolar 7- second molar 8- third molar

3 stages 1- primary dentition :from 6th month to 6th year2- mixed dentition :between 6th to 12th year 3- permanent dentition:after 12th year

Surfaces of tooth :- mesial and distal- labial - lingual - incisal- buccal - occlusal

Line angle and point angle contact area :

Ridge : - marginal - oblique- triangular - transvers

1 -universal system :

:2 -palmer system

3 -F.D.I system :