Preparation Design for Cast Restorations

Question 1

For optimal restorations, what three characteristics should be in balance?

Answer 1

Biological
Mechanical
Esthetic

Question 2

Which type of cast metal restoration is best for longevity?

Answer 2

Gold

Question 3

Biological considerations of tooth preparation include _______, ________, and ______.

Answer 3

Adjacent teeth
Soft tissues
Pulp

Question 4

If you are working with a younger patient, there is more risk for _______ due to a ________.

Answer 4

Pulp damage

Larger pulp

Question 5

Improper contours and margin design will pose what kind of issues for the patient?

Answer 5

Inadequate plaque control and prevention

Question 6

What is “biological width” and why is it important?

Answer 6

The distance between alveolar bone and the cavo-surface margin (maintain 2.0mm)
*If the cavo-surface margin is too close to the bone, it will cause periodontal issues/bone resorption

Question 7

What problem would most likely arise if a chamfer is created using more than half the bur width?

Answer 7

A lip of unsupported enamel will be left at the edge of the chamfer

Question 8

A larger-than-ideal convergence angle will decrease _____ form.

Answer 8

retention

Question 9

Narrow teeth and short teeth will have decreased _____ form.

Answer 9

resistance