Class II cavity prep

Question 1

Class II lesions involve the __surface of posterior teeth

Answer 1

proximal

Question 2

preparation where there is smooth surface caries on the proximal and no pits and fissure caries on the occlusal and it is accessible from the proximal to prepare a proximal box which means only the proximal surface is involved

Answer 2

simple class II

Question 3

Presence of adjacent tooth and occlusal
pits and fissure caries is involved then access
is through the occlusal.

Answer 3

compound class II

Question 4

other name for compound class II

Answer 4

conventional preparation or ideal class II prep

Question 5

modification from the ideal class II if there is still adjacent tooth but no occlusal pits and fissure caries we can do still occlusal approach going thru the marginal ridge of the involved proximal surface and sparing the central groove area and the other proximal pit

Answer 5

slot variation

Question 6

in class II prep buccal and lingual walls

Answer 6

occlusogingival

Question 7

Extend box gingivally with __ bur, depth? and axial wall height?

Answer 7

245 burr

2. 5-3.0 mm in depth
3. 0mm axial wall height

Question 8

crab claw real name

Answer 8

remaining spurs of enamel

Question 9

refine the box walls with

Answer 9

10-7-14 (8/9 hatchet) or 169 bur

Question 10

Ideal box clearance

Answer 10

0. 2-0.3 mm for buccal and lingual

0. 5mm for gingival

Question 11

axial wall shape of box

Answer 11

shape follows the external proximal walls (convex or straight)

Question 12

axialpulpal wall should be straight or rounded?

Answer 12

rounded, not sharp

Question 13

why do we have gingival clearance

Answer 13

caries is under/beneath the gingival line