ABNORMALITIES OF TEETH

Question 1

Division of single tooth germ

Answer 1

Gemination

Question 2

Union of two tooth germs

Answer 2

Fusion

Question 3

Fusion of cementum to the surrounding alveolar bone. Commonly seen in Pri. Man. 2M

Answer 3

Ankylosis

Question 4

Union of teeth by cementum

Answer 4

Concrescence

Question 5

Sharp bend or angulation of the root
Common to upper max 1st

Answer 5

Dilaceration

Question 6

Physiologic loss of tooth structure from tooth to tooth contact

Answer 6

Attrition

Question 7

Loss of tooth structure due to chemicals or acids
(Cervical area, spoon shaped)

Answer 7

Erosion

Question 8

Pathologic loss of tooth structure due to contact with external instrument

Answer 8

Abrasion

Question 9

Autosomal dominant condition that affects dentin in both deciduous and permanent teeth

Answer 9

Dentin dysplasia

Type 1 and 2

Question 10

Dentin dysplasia type 1

Answer 10

Radicular

-more common
-“rootless teeth”
-teeth are extremely mobile leading to premature exfoliation
- completely obliterated pulp

Question 11

A.) Deciduous: Opalescent color, completely obliterated pulp
B.) Permanent: Normal color, enlarged pulp chamber (“THISTLE TUBE”)

Answer 11

Type II (CORONAL)