Vocab

Question 1

Cervical line

Answer 1

External surface of the tooth where the enamel and cementum meet. Cento-enamel junction (CEJ). Separates the anatomic crown from the anatomic root.

Question 2

Dentino-enamel junction

Answer 2

The internal line meeting the dentin and enamel in the anatomic crown

Question 3

Anatomic crown

Answer 3

portion of the tooth covered in enamel

Question 4

Anatomic root

Answer 4

portion of the root covered by cementum

Question 5

Clinical root

Answer 5

Portion of the root that is NOT visible in the mouth. May of may not correspond to the anatomic root.

Question 6

Cemento-enamel junction (CEJ)

Answer 6

separates the anatomic crown from the anatomic root.

Question 7

What determines clinical crown?

Answer 7

Gumline

Question 8

Anterior teeth

Answer 8

Teeth in either arch that are toward the front of the mouth. These include the central incisor, lateral incisor and canine

Question 9

Posterior teeth

Answer 9

teeth toward the back of the mouth. These include the premolars and molars

Question 10

Anterior teeth surfaces

Answer 10

Mesial, Distale, Labila/Facial, Lingual/palatal, Incisal

Question 11

Mesial (M)

Answer 11

toward the midline

Question 12

Distal (D)

Answer 12

away from the midline

Question 13

Labial

Answer 13

toward the lips (facial)

Question 14

Lingual

Answer 14

toward the tongue (palatal)

Question 15

Incisal

Answer 15

The biting edge

Question 16

Posterior teeth surfaces

Answer 16

Mesial, Distal, Buccal (facial), Lingual (palatal), Occlusal

Question 17

Buffalo (B)

Answer 17

posterior, next to the cheeks (facial)

Question 18

Occlusal (O)

Answer 18

the chewing surface

Question 19

Proximal

Answer 19

Any surface between two teeth. Generic term for mesial or distal

Question 20

Line angle:

Answer 20

line or angle formed by the junction of two crown surfaces. The name is derived from combining those two names. The “al” is dropped and an “o” is substitued. When there are two “o’s”, a hyphen is used.

Question 21

What are the 8 anterior line angles?

Answer 21

mesiolabial, mesiolingual, distolabial, distolingual, labioincisal, lingoincisal, mesioincisal, distoincisal

Question 22

What are the 8 posterior line angles?

Answer 22

Mesiobuccal, mesiolingual, distobuccal, distolingual, bucco-occulsal, linguo-occlusal, mesio-occlusal

Question 23

Point angle

Answer 23

Junction of three crown surfaces. Takes the name of those three surfaces.

Question 24

What are the point angles of the anterior teeth?

Answer 24

mesiolabioincisal, mesiolinguoincisal, distolabioincisal, distolinguoincisal

Question 25

What are the point angles of the posterior teeth?

Answer 25

mesiobucco-occlusal, mesiolinguo-occlusal, distobucco-occlusal, distolinguo-occlusal

Question 26

Crown Tooth thirds:

Answer 26

Divided into artificial thirds both horizontally and vertically. Distal, middle, mesial. Incisal or occlusal, middle and cervical (gingival)

Question 27

Root Thirds

Answer 27

Divided into horizontal thirds only. Cervical middle, apical

Question 28

all normal teeth develop from ___ or more lobes

Answer 28

All normal teeth develop from 3 or more lobes

Question 29

Incisors develop from ___ lobes

Answer 29

Incisors develop from 4 lobes- facial from 3 lobes, and the cingulum from 1 lobe

Question 30

Cingulum

Answer 30

A large rounded eminence on the lingual surface of all permanent and deciduous anterior teeth. Encompasses the entire cervical third of the lingual surface.

Question 31

Canines and most premolars develop from ___ lobes

Answer 31

canines and most premolars develop from 4 lobes. 3 facial lobes, and 1 cingulum or lingual cusp (premolar)

Question 32

Molars develop from ____ lobes, forming each cusp

Answer 32

4 or 5

Question 33

Premolar Exception (tooth development from lobes)

Answer 33

3 cusp type premolar, which will have 5 lobes, 3 on facial and 2 on lingual

Question 34

Other exceptions of tooth development

Answer 34

Some maxillary 3rd molars can form from 3 lobes (3 cusps) and peg laterals (less than 3 lobes)

Question 35

Ridges

Answer 35

Linear and usually convex elevations on the surfaces of the crowns. Named according to their location

Question 36

Marginal Ridges

Answer 36

form the mesial and distal terminations on the lingual surface of anterior teeth.
form the mesial and distal terminations of the occlusal surface of posterior teeth

Question 37

Triangular ridges

Answer 37

Descend from the tips of cusps or posterior teeth toward the central area of the occulsal surface

Question 38

Transverse ridges

Answer 38

combination of two triangular ridges

Question 39

Fossa

Answer 39

a rounded depression or concavity. The lingual surface of anterior teeth typically have a large shallow fossa. Posterior teeth usually have two or more on the occlusal surface

Question 40

Crown Depressions

Answer 40

primary grove, secondary groove (auxillary grove that branches from a primary groove), Pit (small depressed area, usually found in the deepest portion of the fossa)

Question 41

Height of Curvature (contour) HOC:

Answer 41

area of greatest convexity on the facial and lingual surfaces. Helps to determine the direction of food particles during mastication. Diverts food from the gingiva and toward the buccal vestibule, palate, and tongue

Question 42

Contact areas (proximal heights of contour)

Answer 42

greatest height of contour on the proximal surfaces of crowns. Where one tooth touches the adjacent tooth.

Question 43

Embrasure spaces

Answer 43

When adjacent teeth touch, the space that surrounds the contact area can be divided into separate triangular embrasure spaces. Occlusal or incisal embrasure. Gingival embrasure-interproximal space) cervical to the contact area. Lingual embrasure is usally larger than the facial/buccal embrasure