DDS Orthodontics and Pediatric Dentistry 2

Question 1

Pulp therapy for a carious primary molar with a normal radiograph and no spontaneous pain, but mechanical pulp exposure, is best treated by:

Accepted Answer

Pulpotomy with mineral trioxide aggregate (MTA) or ferric sulfate

Answer

Direct pulp cap with calcium hydroxide

Answer

Indirect pulp cap

Answer

Immediate extraction

Question 2

The primary function of a space maintainer after premature loss of a primary second molar is to:

Accepted Answer

Prevent mesial drift of the permanent first molar into the extraction space

Answer

Stimulate eruption of the underlying premolar

Answer

Guide the permanent canine into proper position

Answer

Maintain the vertical dimension of occlusion

Question 3

Molar-incisor hypomineralization (MIH) affects which teeth?

Accepted Answer

First permanent molars and permanent incisors

Answer

All primary molars and primary incisors

Answer

Second permanent molars and canines

Answer

All permanent posterior teeth

Question 4

Rapid palatal expansion (RPE) is used to correct:

Accepted Answer

Bilateral posterior crossbite due to maxillary arch constriction

Answer

Mandibular prognathism

Answer

Class II malocclusion by advancing the mandible

Answer

Deep overbite with supraocclusion of incisors

Question 5

Which type of tooth movement requires the most force in orthodontics?

Accepted Answer

Translation (bodily movement)

Answer

Tipping

Answer

Torque (root movement)

Answer

Intrusion

Question 6

The recommended fluoride concentration in community water fluoridation as updated by the US Department of Health and Human Services (HHS) is:

Accepted Answer

0.7 ppm

Answer

0.5 ppm

Answer

1.0 ppm

Answer

1.2 ppm