Removable Final Flashcards
Rests
A rigid extension of a partial denture that prevents movements towards mucosa and transmits functional forces to the teeth
Indirect retainers
A component of RPD located of the opposite side of the fulcrum line which assists the direct retainer in preventing displacement of the extension base through mechanical leverage
Major connector
A plate, strap, or bar the connects the components of the partial denture on one side of the arch with those on the opposite side. MUST BE RIGID
Minor connectors
A connecting link between the major connector or base and other units of the prosthesis such as clasps, indirect retainers and rests
Proximal plates
A plate of metal in contact with the proximal surface of an abutment tooth
Plastic retention area/Denture connector
Loops or mesh designed to mechanically lock the plastic resin to the metal framework
Base
The component of an RPD that contacts the oral mucosa a and to which artificial teeth are attached
Direct retainers
A clasp or attachment applied to an abutment tooth for the purpose of retaining the RPD. It is directly responsible for the retention of the prosthesis
Teeth
Denture teeth or metal
Support
The foundation areas n which a dental prosthesis rests; with respect to dental prosthesis, the resistance to forces directed toward the basal tissue or underlying structures
Stability
the quality of a denture to be firm, not subject to position when lateral or oblique forces are applied. “The fish tail principle”
Retention
The quality inherent in a partial denture that resists the force of gravity, the adhesive mess of foods, and the forces associated with opening of the jaws
What is the importance of a rest
Without it the prosthesis will continue to harm the periodontal status, bone and tissue juxtaposing the tooth.
Occlusal rests
1/3 the faciolingual width of tooth
1/2 the width of the tooth a t the cusp tips
1.5mm deep at the marginal ridge and deeper centrally
Less than 90 degree angle with connector
What do angles on an occlusal rest cause
Stress concentration
Where to place rests in a class III/IV
Place adjacent to modification space as these classes are tooth supported
Where to place rests on class I adn II
W no adjacent teeth you want the rest to be placed on th side with teeth (M) b/c placing it on side w out teeth will move tooth (D) and nothing is opposing it and it can be lifted out.
