Deck 23: Developmental Disturbances of Teeth and Bone

Question 1

Anodontia refers to:

A)extra teeth.
B)malpositioned teeth.
C)multiple impacted teeth.
D)the complete absence of teeth.

Answer 1

the complete absence of teeth.

Question 2

All of the following are Dens "invaginatus" EXCEPT one.Which one is the EXCEPTION?

A)An invagination of the enamel organ
B)Usually at the point of the cingulum
C)Not a "tooth within a tooth"
D)A permanent distortion

Answer 2

A permanent distortion

Question 3

Impacted teeth can be localized in their mesiodistal position by periapical,panoramic,or lateral oblique films.

Answer 3

True

Question 4

A supernumerary tooth in the midline is referred to as a(an):

A)taurodont.
B)mesiodens.
C)odontoform.
D)enamel pearl.

Question 5

A permanent distortion of the shape of the crown or root of the tooth is a condition referred to as dens in dente.

Question 6

Which of the following condition(s)are hereditary disturbances?

A)Fusion
B)Amelogenesis imperfect
C)Dentinogenesis imperfect
D)Amelogenesis imperfect and Dentinogenesis imperfect

Question 7

After the tooth erupts,the dental papilla appears:

A)at the crown.
B)buccal to the crown.
C)lingual to the crown.
D)at the forming apices.

Question 8

All of the following terms are synonymous EXCEPT one.Which one is the EXCEPTION?

A)Extra teeth
B)Hypodontia
C)Hyperdontia
D)Supernumerary teeth

Question 9

Cleft palate can occur in either the hard or soft palate,or both.Radiographically,a cleft palate will appear as a radiopaque area.

A)Both statements are true.
B)Both statements are false.
C)The first statement is true,the second statement is false.
D)The first statement is false,the second statement is true.

Question 10

Identify the teeth most commonly impacted:

A)maxillary canines.
B)mandibular canines.
C)mandibular premolars.
D)maxillary and mandibular third molars.

Question 11

Identify the teeth most commonly associated with dentigerous cysts:

A)canines.
B)incisors.
C)premolars.
D)third molars.

Question 12

Teeth that exhibit dilaceration may be a problem if what type of treatment is needed?

A)Extraction
B)Endodontic therapy
C)Amalgam restoration
D)Extraction and Endodontic therapy

Question 13

Radiographically in fusion we see:

A)one pulp canal.
B)calcified canals.
C)two pulp canals.
D)radiolucent canals.

Question 14

In amelogenesis imperfecta,the tooth tissue that is affected is:

A)enamel.
B)dentin.
C)pulp.
D)None are correct.

Question 15

A club-shaped root is usually a sign of:

A)pathology.
B)concrescence.
C)hypercementosis.
D)cemental dysplasia.

Question 16

Identify the location of the permanent tooth buds as they develop:

A)distally to the deciduous teeth.
B)apically to the deciduous teeth.
C)lingually to the deciduous teeth.
D)mesially to the deciduous teeth.

Question 17

When teeth chip easily and radiographs reveal short roots and early pulp calcification,dentinogenesis imperfecta is present.

Question 18

The joining of two or more teeth by cementum is termed:

A)fusion.
B)germination.
C)concrescence.
D)taurodontism.

Question 19

When a tooth has what appears to be two crowns and one root canal,the condition is called concrescence.