Principles for Design Outline form

Question 1

5 factors determining outline form?

Answer 1

1. Conservation of tooth structure
2. Caries
3. Undermined enamel
4. Decalcified enamel
5. Extension for restorability

Question 2

What measurement of the oblique ridge should we connect two preparations together?

Answer 2

Less than 1.0 mm

Question 3

What 4 things do we focus on to conserve tooth structure

Answer 3

1. Marginal ridges - outline is parallel to marginal ridge outline
2. Triangular ridges - Buttresses that give tooth strength
3. Isthmus - Keep isthmus small we minimize removing triangular ridge
4. Oblique ridge - Outline is parallel to oblique ridge

Question 4

What is the biggest factor in determining the outline design?

Answer 4

Caries

Question 5

Which way do caries spread once they get past the DEJ?

Answer 5

Laterally

Question 6

T or F, Make sure to look under the enamel along the DEJ to make sure all caries is removed

Answer 6

True

Question 7

Do you need to include decalcified enamel in your outline form?

Answer 7

Yes, but might want to try chemotherapy first to remineralize tooth before the the preparation is done.

Question 8

Purpose of extension for restorability

Answer 8

Ability to carve and polish away excess restorative material

Question 9

Modifying factors of outline form

Answer 9

1. Type of restorative material used
2. Esthetic requirements
3. The patient
4. Occlusion
5. Tooth position and size

Question 10

Amalgam extensions allow for how much of separation?

Answer 10

0.5 - 1.0 mm

Question 11

Difference between amalgam and inlay preparation

Answer 11

Walls converge –> Amalgam

Walls diverge –> Inlay

Question 12

How are facial and lingual extensions different in gold inlay

Answer 12

Wider extensions

Question 13

Are you more aggressive or less aggressive on removing decalcification if a patient is noncompliant

Answer 13

More aggressive