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18 Cards in this Set
- Front
- Back
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Is to provide vertical support for the partial denture |
Rest |
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Outline should be rounded triangular shape |
Occlusal restits hould be a |
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Its should be as long as it is wide and the base of the triangular shape should be at least 2.5mm for both molars and pm |
Occlusal rest and rest seat |
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The floor of the occlusal rest seat should be apical to the marginal ridge |
Concave or spoon shaped |
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Angle form of occlusal rest and vertical minor connector |
Should be less than 90 degree |
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These rest seats are prepared as individual occlusal rest seats with the exception that the preparations must be extended farther lingually than is ordinarily accomplished |
Interproximal occlusal rest seats |
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Rather than single rest are used to prevent interproximal wedging by the framework |
Adjacent rests |
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Joined rests are designed to shunt food away from contact points |
Interproximal occlusal rest seats |
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Is derived from the near vertical walls of this type of rest seatho |
Horizontal stabilization |
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The form of rest should be |
Parallel to the path Slighlty tapered occlusally Slightly dovetailed |
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It facilitates the elimination of a visible clasp arm bucally and permits the location of the rest seat |
Internal rest |
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Is provided by a lingual clasp arm either cast or of wrought wire |
Retention |
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‼️ |
The preparation of occlusal rest seats always must follow proximal preparation never precede it |
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Used to lower the marginal ridge and to establish the outline form of the rest seat |
Larger round bur |
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Used to deepen the floor of the occlusal rest seat |
Smaller round bur |
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Commonly used in retainer for rpd |
Extracoronal clasp type |
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Accomplished by using frictional means by engaging a depression in the abutment tooth or by engaging a tooth undercut lying cervically to its height of contour |
Retention |
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U |
M |
