Post, Cores, Crowns Flashcards
1
Q
What thickness of reduction on the incisal edge is required for an upper central incisor all ceramic crown?
A
2mm
2
Q
What is the minimum height, in millimeters, that a crown preparation need to be for effective retention? (between restoration margin to occlusal surface)
A
3mm
3
Q
Internal angles for a gold onlay/inlay
A
sharp angles
4
Q
Why to be cautious with inlays?
A
wedge retention predisposes the tooth to fracture
5
Q
Contraindications of an inlay?
A
tooth with RCT
MOD on premolars
wide isthmus MOD on molars
6
Q
Occlusal reduction for porcelain metal crown?
A
if porcelain is covering the occlusal surface:
2mm functional cusp
1.5mm at other cusps
7
Q
How high does the ferrule need to be?
A
1.5-2mm minimum above the crown margin
