Quiz 1

Question 1

The three principles of tooth preparation are:

Answer 1

Biologic
Mechanical
Esthetic

Question 2

8 indications for complete veneer crowns

Answer 2

Extensive destruction by caries or trauma
Endodontically treated teeth
Large existing restorations
Maximum retention needed (fixed partial denture)
Recontouring of axial surfaces
Correction of malinclination
Correction of occlusal discrepancies
To provide contours suitable for a removable partial denture

Question 3

5 places you might take off too much tooth structure

Answer 3

Excessive convergence angle
Prep not following anatomical features of tooth
POW diverges from long axis of the tooth
Margin over 0.5
Excessive gingival extension

Question 4

4 things that will screw up marginal integrity of the restoration

Answer 4

Too narrow chamfer
Unclear cavosurface line angle
Rough or uneven chamfer
Under cut prep

Question 5

3 things that screw up retention and resistance

Answer 5

Greater than 10˚ convergence angle
Too short or too high axial walls
Not enough surface area to resist tipping

Question 6

The 242.6 bur has an angulation of

Answer 6

3-4˚

Question 7

5 steps for doing a CVC

Answer 7

Occlusal guide grooves
Occlusal reduction
Axial guide grooves
Axial reduction
Finishing and eval

Question 8

The four types of finish lines

Answer 8

Shoulder
Beveled shoulder
Heavy chamfer
Chamfer