Abnormalities of the Teeth

Question 0

Are supernumeraries more common in the maxilla or mandible?

Answer 0

maxilla

Question 1

What are the three most common congenitally missing teeth?

Answer 1

3rd molars
maxillary lateral incisors
second premolars
*these are the last teeth to develop in their catagory!

Question 2

Mesiodens

Answer 2

a supernumerary tooth between maxillary central incisors

Question 3

Define Taurodonism

What is it associated with?

Answer 3

A molar with an elongated root trunk

Associated with amelogenesis imperfecta, Klinefelter’s Syndrome, Down’s Syndrome

Question 4

Which of the following is missing more teeth? Oligodontia or Hypodontia?

Answer 4

Oligodontia= missing a large number of teeth
Hypodontia= missing a few teeth

Question 5

Define Dens invaginitis? What is another name for it?

Answer 5

Invagination of the maxillary laterals

Question 6

Define Dens envagenatus

Answer 6

A focal portion of the crown project outward, creating an extra cusp

Question 7

Talon cusp

Answer 7

an example of Dens envaginatus on the maxillary laterals

Question 8

Concrescence

Answer 8

fusion of two completely formed teeth at the roots, they must have confluent cementum

Question 9

Fusion

Answer 9

fusion of two unique tooth buds, must have confluent dentin

Question 10

Gemination

Answer 10

Development of two crowns from a single tooth bud. They share a single root and root canal