Fixed 3 Test 1

Question 1

Abutment

Answer 1

Part of structure that directly receives pressure

OR

A tooth/ portion of implant that serves to support and retain prosthesis

Question 2

Need mounted diagnostic casts to evaluate what 6 things

Answer 2

Occlusal plane
Interarch clearance
Treatment position
Change in VDO
Occlusal analysis
Esthetic analysis

Question 3

Diagnostic tooth preparations are indicated for

Answer 3

Rotated, tipped or extruded teeth

Question 4

3 primary factors of retention

Answer 4

Taper (less = better)
Length (more = better)
Surface area (more = better)

Question 5

PFM facial margin design

Answer 5

Sloped shoulder

Question 6

Sloped shoulder for PFM advantages (3)

Disadvantages (5)

Answer 6

A: esthetics (no metal collar)
Less intrusive into gingival crevice
Simple lab construction

D: harder prep to do
More marginal creep
Rough marginal area
Potential gray line
Lab tends to overcontour

Question 7

Shoulder advantages (3) and disadvantages (3)

Answer 7

A: optimum esthetics
Less plaque if glazed porcelain
Margin doesn’t need to be buried

D: higher lab costs
More difficult lab procedure
More difficult prep

Question 8

Feldspar:

Answer 8

Naturally occurring glass that contains silica, fluxes and alumina.

Question 9

Three porcelain particle types

Answer 9

Opaque porcelain
Body or dentin porcelain
Incisal or enamel porcelain

Question 10

2 ad/4 disadvantages of porcelain labial margin and what is it

Answer 10

Shoulder/dentin/enamel porcelain

A: better esthetics
Less plaque retention

D: inferior margin adaptation than cast metal
Less strong than metal
Takes longer/more difficult
More expensive than MCC

Question 11

Direct lift technique 1ad/2disadvantages

Answer 11

Least time consuming

Need shoulder porcelain
Slightly rough margins