Class II Slot #21 (Week 14) Flashcards
What are the two types of class II preps
Conventional and slot
When will be the only times you will perform a conventional class two
- If you are replacing a conventional class II prep
- If there are caries on the proximal and occlusal
When would you use the slot Class II prep
When there is only caries on the proximal
The (conventional/Slot) Class to prep is more conservative
slot
Why back in the day did dentists perform conventional class II preps on people who only had proximal caries
retetion
Why is it no longer necessary to perform conventional class two prep when only proximal caries are present
due to the improvement of bonding adhesives
What is the occlusal outline includes the __ pit only
nearest pit only
Clearance from the buccal lingual and gingival walls is __ to __ mm
0.25- 0.5mm
Buccal and lingal walls will be __ to the occlusal to for a __ degree angle with the occlusal surface
parallel…90
How is unsupported enamel removed
enamel hatchet
The axial is __(positioned) relative to the long axis
parallel
The axial wall will be (convex/concave) BL
convex
How deep is the axial wall mesiodistally measured from the gingival wall
1.0-1.25mm
The gingival wall should be (horizontal/vertical)
horizontal
What are the three subcategories in the occlusal anatomy box on the criteria sheet
- Groove
- Fossae
- Cuspal planes
When one out of the three for the occlusal anatomy category remains the same for the slot Class two
just fossae (cusp planes and grooves aren’t restored)
What embrasures are being reproduces with this restoration
occlusal, gingival, facial, and linugal
The marginal ridge heigh is the same as..
the hight of the marginal ridge on the adjactent tooth
The marginal ridge is normally (Convex/concave) and the proximal contour is normally (Convex/concave)
concave… convex
When would you perform a class II MOD prep
- When both proximal surfaces and the occlusal have caries
- Replace existing restoration
What are the possible surfaces in conventional Class II
MO
DO
MOD
What are the possible surfaces in slot Class II
MO
DO
