Anatomy of Teeth

Question 1

Clinical Crown

Answer 1

The part of the anatomical crown you can see in the mouth

Question 2

Anatomical Crown

Answer 2

CEJ to incisal edge/occlusal surface

Question 3

Enamel

Answer 3

Function: Protection (from chewing, biting, bacteria)
Composition:
96% inorganic: Calcium hydroxyapatitie
4 % organic

Question 4

Dentin

Answer 4

Function: Absorbing forces, shock absorber
Composition: 70 % inorganic, mainly calcium hydroxyapatite
30 percent organic

Question 5

Cementum

Answer 5

Function: Anchoring site for PDL fibers
Composition: 50 % inorganic
50 percent organic

Question 6

Pulp

Answer 6

Function: Carries blood vessels and nerves to the teeth
Composition: Loose connective tissue, nerves, blood vessels

Question 7

Height of Contour/Contacts

Answer 7

Crest of curvature

Question 8

The Col

Answer 8

depression half-way between the facial/buccal and lingual surfaces of the teeth
-site of probe placement

Question 9

no contact in primary dentition

Answer 9

primate spaces

Question 10

Formed by the junction of two crown surfaces

Answer 10

Line Angles

Question 11

Formed by the junction of three crown surfaces

Answer 11

Point angles

Question 12

One or more major elevations on the masticatory surface of canines and posterior teeth

Answer 12

Cusp

Question 13

Supporting soft and hard dental tissues between and including portions of the tooth and alveolar bone

Answer 13

Periodontium

Question 14

Consists of cementum, periodontal ligament and alveolar bone

Answer 14

Periodontium

Question 15

Serves to support the tooth in its relationships to the alveolar bone

Answer 15

Periodontium

Question 16

Provides the attachment of the teeth to the surrounding alveolar bone by way of the cementum
Organized, fibrous connective tissue (CT)
Fibroblast is most common cell in PDL
Transmits occlusal force from teeth to the bone (maintains bone levels)
Shock absorber
Principle fibers and Sharpey’s fibers

Answer 16

PDL

Question 17

PDL Main Principle group is _____ Ligament: comprised of 5 fiber groups

Answer 17

Alveolodental

• Alveolar crest group
• Horizontal Group
• Oblique Group
• Apical group
• Interradicular group