Dental Anomalies

Question 1

Intrinsic staining of the teeth is commonly caused by what medication(s)? What part of the tooth structure is stained?

Answer 1

Tetracycline

Dentin is stained

Question 2

Is the structure of the teeth compromised y tetracycline intrinsic staining?

Answer 2

no

Question 3

What lobes are missing in a peg lateral incisor?

Answer 3

mesial and distal

Question 4

What lobes are normally developed in a peg lateral incisor?

Answer 4

middle and lingual lobe

Question 5

What are the 4 types of tooth bud developmental abomalies?

Answer 5

1. fusion
2. germination
3. twinning
4. concrescence

Question 6

What is the condition when 2 roots combine into one crown, the union of two adjacent tooth germs, and always involves dentin?

Answer 6

fusion

Question 7

What is the abnomaly when a tooth has 1 root but 2 crowns?

Answer 7

germination

Question 8

What is the most common tooth that exhibits gemination?

Answer 8

maxillary central and lateral incisors

Question 9

What is it called when there is splitting of a single forming tooth?

Answer 9

twinning or identical supernumerary teeth

Question 10

What is concresence?

Answer 10

superficial union of roots of approximating teeth by way of the deposition of only cementum

Question 11

What is it called when the outer enamel of permanent teeth is folded inwards and the tissue is wrapped?

Answer 11

Dens-in- Dente or dens invaginatus

Question 12

What is the most common tooth to exhibit dens-in-dente?

Answer 12

maxillary lateral incisor

Question 13

What causes dens-in-dente?

Answer 13

infolding of the dental papilla during tooth development

Question 14

What are the forms of dens-in-dente?

Answer 14

coronal and radicular

Question 15

What is a rare dental condition characterized by a congenital absence of all teeth (both primary and permanent dentitions).

Answer 15

Anodontia

Question 16

Aplasia, hypodontia, and anodontia are also known as missing teeth. The primary mandibular central incisors are most common tooth group missing int he primary dentition

A. Both statements are true
B. First statement true; second statement false
C. First statement false; second statement true
D. Both statements false

Answer 16

A. Both statements are true

Question 17

Patients exhibit variations that are characterized as familial traits. Unilateral variations are more common than bilateral variations.

A. Both statements are true
B. First statement true; second statement false
C. First statement false; second statement true
D. Both statements false

Answer 17

A. both statements are true

Question 18

Teeth that erupt into oral cavity but fail to reach occlusion with opposing arch because of fusion to the alveolus is called what?

Answer 18

Ankylosis