Third molars 2

Question 1

Why take an OPT before surgery?

Answer 1

presence/ absence of disease
Anatomy of 3rd molar
Depth of impaction
Orientation of impaction
Follicular width
Proximity of Upper molars to sinus
Proximity of lower molars to IAN

Question 2

What to look out for on Radiograph?

Answer 2

interruption of white lines/ lamina dura
darkening of roots
diversion/delfection of canal
deflection of root
narrowing of root
narrowing of canal

Question 3

signs of significant risk of nerve injury to IAN

Answer 3

diversion of IDC
darkening of roots where crossed by canal
interruption of white lines of canal

Question 4

What further imaging to take if suspect close relationship?

Answer 4

CBCT to localise proximity

Question 5

most common types of angulation of 8

Answer 5

vertical 30-38%
mesial 40%

Question 6

what angulation to measure against

Answer 6

Curve of spee

Question 7

what does depth of impaction indicate?

Answer 7

indication for amount of bone to be removed

Question 8

types of depth

Answer 8

superficial - crown of 8 relative to crown of 7
moderate - crown of 8 related to crown and root of 7
deep - crown of 8 related to root of 7