Dental Anomalies

Question 1

Teeth in excess of the normal

complement

Answer 1

Hyperodontia

Question 2

Hyperdontia in maxillary incisors

Answer 2

Mesodens

Question 3

Hyperdontia of mand or max 4th molars

Answer 3

Distodens/paramolars

Question 4

Problems with

• Affect eruption of normal complement of
teeth
• Cystic degeneration of follicular
epithelium

Answer 4

Supernumeraries

Question 5

What is the most common supernumerary tooth?

Answer 5

Mesodens

Question 6

Multiple supernumerary teeth are most common in what area?

Answer 6

PM area

Question 7

What are the 2 syndromes with multiple teeth?

Answer 7

Cleidocranial Dysplasia

Gardner

Question 8

• Frontal & parietal bossing

* Clavicular aplasia

Answer 8

Cleidocranial Dysplasia

Question 9

• Autosomal dominant
• Multiple osteomas including the jaws
• Colorectal polyps with malignant potential
• Multiple supernumerary teeth
• Lesions of skin (cutaneous epidermoid cysts
and fibromas)

Answer 9

Gardner Syndrome

Question 10

less than the normal tooth 
complement of an existing dentition; 
permanent or deciduous
less than one or more of an existing 
dentition; permanent or deciduous

Answer 10

Hypodontia

Question 11

congenital absence of all teeth

Answer 11

Anodontia

Question 12

– agenesis of all teeth

Answer 12

• Anodontia

Question 13

– congenital lack of > 6
permanent teeth, excluding third molars
•

Answer 13

• Oligodontia

Question 14

– less than one or more of
an existing dentition; permanent or
deciduous

Answer 14

Hypodontia

Question 15

What are the 5 syndromes mentioned that are common with hypodontia?

Answer 15

• ectodermal dysplasia
• oligodontia-colorectal cancer syndrome
• ectodermal dysplasia with oligodontia-
colorectal cancer syndrome 
• otodental dysplasia – associated with 
deafness
• Rieger Syndrome – associated with 
deafness

Question 16

• Hypodontia not associated with other
multiple system congenital syndrome
• Seen with third molars and maxillary
lateral incisors

Answer 16

Reduction Phenomenon

Question 17

Is peg lateral incisors (AMLI) more autosomal or sex linked recessive or dominant?

Answer 17

AD

Question 18

If a tooth has gemination, twinning, fusion, or concresence occur, what do we call this clinically?

Answer 18

Macrodontia

Question 19

• Abnormal angulation 
or bend in the root 
(and occasionally 
the crown) of a tooth
• Some related to 
trauma during 
odontogenesis
• idiopathic

Answer 19

Dilaceration

Question 20

• Extra roots above 
the complement 
of roots classically 
described for the 
dentition

Answer 20

Supernumerary Roots

Question 21

– physiologic wear of teeth

Answer 21

Attrition

Question 22

– mechanical wear of teeth

Answer 22

Abrasion

Question 23

– chemical wear of teeth

Answer 23

Erosion

Question 24

• Idiopathic developmental 
disorder of odonogenesis 
causing elongation of the 
pulp chamber (aka apical 
displacement of the 
pulpal floor) and shorter 
root appendages 
• failure of Hertwig's 
epithelial sheath 
diaphragm to invaginate 
at the proper horizontal 
level, resulting in a tooth 
with short root, enlarged 
body, an enlarged pulp 
and normal dentin

Answer 24

Taurodontism

Question 25

• Primarily seen in 
lateral incisors but 
also centrals, 
premoalrs, centrals, 
canines.....

Answer 25

Dens in Dente

Question 26

Type ___ dens in dente:

Coronal

Answer 26

Type 1

Question 27

Type _____ dens in dente:

Extends apical to CEJ

Answer 27

Type 2

Question 28

Type _____ dens in dente:

Extends through root perforating to apex

Answer 28

Type 3