Principles for Design Outline form Flashcards

1
Q

5 factors determining outline form?

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

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

A

Less than 1.0 mm

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3
Q

What 4 things do we focus on to conserve tooth structure

A
  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
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4
Q

What is the biggest factor in determining the outline design?

A

Caries

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5
Q

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

A

Laterally

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6
Q

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

A

True

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7
Q

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

A

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

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8
Q

Purpose of extension for restorability

A

Ability to carve and polish away excess restorative material

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9
Q

Modifying factors of outline form

A
  1. Type of restorative material used
  2. Esthetic requirements
  3. The patient
  4. Occlusion
  5. Tooth position and size
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10
Q

Amalgam extensions allow for how much of separation?

A

0.5 - 1.0 mm

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11
Q

Difference between amalgam and inlay preparation

A

Walls converge –> Amalgam

Walls diverge –> Inlay

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12
Q

How are facial and lingual extensions different in gold inlay

A

Wider extensions

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13
Q

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

A

More aggressive

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