CH: 11 Angles and Divisions of Teeth

Question 1

Why do we divide the crown and the root of the teeth into thirds

Answer 1

To describe a specific location on a tooth

Question 2

What terms do we use to describe junctions in the divisions of teeth?

Answer 2

Line angles and point angles.

Question 3

How is a line angle formed?

Answer 3

It forms by the junction of two surfaces that join.

i.e. on and anterior tooth, the junction of the mesial and labial

Question 4

How is a point angle formed?

Answer 4

It forms by the angle by the junction of three surfaces at one point
i.e the junction of an mesial, buccal, and occlusional surface of a molar is called the mesiobucco-occlusal point angle

Question 5

The apical third is the area closet to the..

Answer 5

tip of the root

Question 6

The cervical third is closest to the..

Answer 6

neck of the tooth.

Question 7

The crosswise division parallel to the occlusal or incisal surface, that consist of the occlusal third, middle third, and cervical third is the..

Answer 7

Occlusocervical division.