DDS Orthodontics and Pediatric Dentistry

Question 1

The leeway space (E-space) refers to the size difference between which groups of teeth?

Accepted Answer

Combined width of primary canine and molars minus combined width of permanent canine and premolars

Answer

Primary incisors and permanent incisors

Answer

Space between the permanent first molar and permanent canine

Answer

Arch length increase due to second molar eruption

Question 2

The normal overjet (horizontal overlap) in a Class I occlusion is approximately:

Accepted Answer

2–4 mm

Answer

0 mm (edge-to-edge)

Answer

6–8 mm

Answer

1 mm or negative

Question 3

Fluoride varnish application in pediatric patients is recommended beginning at:

Accepted Answer

Eruption of the first primary tooth (approximately 6 months)

Answer

Birth (at the first well-child visit)

Answer

Age 2 years

Answer

Age 3 years when all primary teeth are erupted

Question 4

A child presents with a completely avulsed permanent incisor. The best immediate storage medium before replantation is:

Accepted Answer

Hank's Balanced Salt Solution (HBSS) or milk

Answer

Dry storage in a tissue or napkin

Answer

Tap water

Answer

Saline only

Question 5

The primary treatment for early childhood caries (nursing bottle caries) is:

Accepted Answer

Elimination of the cariogenic feeding habit, diet counseling, and restorative treatment of affected teeth

Answer

Immediate full-mouth extraction under general anesthesia

Answer

Prescription fluoride drops alone

Answer

Watchful waiting until all primary teeth have erupted

Question 6

In orthodontic treatment, a headgear appliance with a cervical-pull (low-pull) force direction applies force that:

Accepted Answer

Distalizes and extrudes the maxillary molars, restraining forward maxillary growth

Answer

Intrudes and retracts the maxillary molars vertically

Answer

Protrudes the maxillary molars mesially

Answer

Intrudes the maxillary incisors