Permanent Dentition

Question 1

How many teeth in total

Answer 1

32 = I 2/2 C 1/1 P 2/2 M 3/3 (8 in each quadrant)

Question 2

Geometry of p. incisors

Answer 2

Trapezoidal, incisal margin > cervical margin

Question 3

Differences between 1st (central) and 2nd (lateral) maxillary incisors

Answer 3

(1st=) wider incisal margin, height of crown = length of root, medial surface of crown and root in line, root tilted slightly toward distal side, cingulum
(2nd= ) more slender- less wide, length of root > height of crown, Cingulum with foramen caecum

Question 4

Mandibular incisors

Answer 4

Smaller than max, 1st symmetrical (hard to distinguish), 2nd slants distally on occlusal surface & angle of distal tooth where meets root (as well as at incisal margin) greater than mesial

Question 5

P. Canines

Answer 5

Single root, single cusp (max ~1/3rd of tooth, mand. 1/8th)

Question 6

Which canine has a cingulum

Answer 6

Maxillary, may have central ridge

Question 7

P. Maxillary canine

Answer 7

Single root, single cusp
Distinct bulge on distal aspect
Longer distal slope
Crown height = crown width

Question 8

P. Mandibular canine

Answer 8

Single root (variations- root can start to bifurcate), cusp may be worn to ridges
Distinct angle of mesial edge where meets root (at CM)
No distinct cingulum
Crown height > crown width (more rectangular)

Question 9

How many cusps do premolars generally have

Answer 9

2 (bicuspid), 2nd Mandibular has 3

Question 10

Only p. premolar with 2 roots

Answer 10

Maxillary 1st

Question 11

Distinctions of maxillary 1st premolar

Answer 11

Larger buccal cusp
Mesial dimension > distal
Mesial surface contains canine fossa & fissure can cross

Question 12

Ridge definition

Answer 12

Linear elevation of surface of tooth

Question 13

Mandibular 1st premolar

Answer 13

Buccal cusp > lingual
Occlusal surface inclines obliquely
Ridge down towards lingual cusp, 2 fossae on either side (distal more prominent, mesial may extend and be visible on lingual surface)

Question 14

Fossa definition

Answer 14

Depression

Question 15

Anatomical root

Answer 15

Part of tooth covered by dental cementum

Question 16

Anatomical crown

Answer 16

Part of tooth covered by dental enamel (hard tissue)

Question 17

Cervical margin

Answer 17

Where anatomical root meets anatomical crown

Question 18

Layers of anatomical crown

Answer 18

Enamel, dentine, pulp

Question 19

Layers of anatomical root

Answer 19

Periodontal ligament, cementum, dentine, pulp

Question 20

Clinical crown

Answer 20

Part of tooth seen in mouth

Question 21

Clinical root

Answer 21

Part of tooth not seen in mouth