Impacted Teeth Flashcards
1
Q
What constitutes an impacted tooth?
A
One that fails to erupt into the dental arch within the expected range of time
2
Q
Which teeth are most common to be impacted?
A
- 3rd molars
- mx canines
- md premolars
3
Q
What usually causes md 3rd molar impaction?
A
- failure to rotate upright
- inadequate room in arch
- just stops erupting for some reason
4
Q
When is the ideal time to remove 3rd molars?
A
When roots are 1/3 - 2/3 developed
5
Q
An impacted 3rd molar poses what threat to the 2nd molar?
A
Increased chance for periodontal disease on distal surface because crystal bone height is very far apical
6
Q
What factors help determine the degree of difficulty of extracting 3rd molars?
A
- accessibility
- angulation
- nature of overlying tissue
- relationship to ramus
- relationship to occlusal plane
- root morphology
