Lecture 11

Question 1

If a person as less than 4 mm arch length discrepancy is extraction indicated?

Answer 1

-Rarely

Question 2

If the arch length discrepancy is 5-9 mm is extraction indicated?

Answer 2

-Both extraction and non-extraction are possibilities

Question 3

If the arch length discrepancy is over 10 mm is extraction required?

Answer 3

-True

Question 4

T/F Extraction had a positive effect on the profile of patients with some combination of crowded and proclined teeth

Answer 4

True

Question 5

THe majority of impacted canines are displaced toward what area?

Answer 5

-Palatal

Question 6

What are the three surgical techniques for uncovering a canine?

Answer 6

• Gingevectomy
• Apically positioned flap
• Closed eruption technique

Question 7

T/F Ectopic eruption of canines (or any tooth) may cause sever root resorption of adjacent teeth

Answer 7

True

Question 8

What percent increase in the eruption angle of the canine relative to the lateral incisor increases the risk of resorption of the lateral incisor by 50 percent?

Answer 8

25 percent