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11 Cards in this Set
- Front
- Back
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What are the biologic requirements for interim crown prep? |
-Protection of pulp -Maintain periodontal health -Provide occlusal compatibility -Maintain tooth position -Protect against fracture |
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What are the mechanical requirements for interim crown prep? |
-Resist functional loads -Resist removal forces -Maintain interabutment alignment |
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What are the esthetic requirements for interim crown prep? |
-Easily contourable -Color compatibility -Translucency -Color stability |
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Why must interim crowns have good marginal fit, proper contour and smooth surfaces? Important for supra or subgingival? |
Important to maintain good perio health. Important for apical of the free gingival margin |
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When gingival tissue is impinged what is likely to occur? |
ischemia is likely to develop |
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How does supraeruption occur? |
Premature contact with the occluding surfaces |
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How does horizontal movement occur? |
excessive or deficient occlusal contacts |
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Partial FDPs are often weak. How do you strengthen them? |
Over contouring the connectors |
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Custom external surface form |
A custom ESF is a negative reproduction of either the patient’s teeth before preparation or a modified diagnostic cast. |
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What is the external surface form? |
ESF is the forming of the external contour of the crown |
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What is the tissue surface form? |
TSF forms the prepared tooth surfaces |
