Orthodontics

Question 1

How much movement per unit of time is expected using orthodontic forced eruption?

Answer 1

1.5 mm/week

Question 2

A ___ is placed when primary second molars have exfoliated or are very close to exfoliating. This device maintains the leeway space

Answer 2

lower lingual holding arch

Question 3

In a pure rotation movement, it is at the center of resistance, which is approximately at the ___ of the root for a maxillary central incisor

Answer 3

middle

Question 4

ANB 0-4 degrees

Answer 4

CI

Question 5

ANB > 4 degrees

Answer 5

CII

Question 6

When a simple tipping force is applied to the crown of a central incisor, the center of rotation is closest to which of the following?

Answer 6

center of tooth

Question 7

center of rotation in controlled tipping

Answer 7

apex

Question 8

leeway space for Mx and Mn

Answer 8

3 Mx
5 Mn

Question 9

What is the most likely cause for the unilateral crossbite?

Answer 9

Constriction of the palate w/ functional shift

Question 10

A steep mandibular plane angle is associated with an ___ ___ ___, a long anterior facial height, and a class ___ malocclusion.

Answer 10

anterior open bite
II