planning the design for removable partial dentures (part 2). prof dr.ahlam el-sharkawy pharos...
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PLANNING THE DESIGN FOR REMOVABLE PARTIAL DENTURES (PART 2)
.Prof Dr.Ahlam El-Sharkawy Pharos university in
Alexandria
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4- Joining the saddles and retainer units
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:Joining the saddles and retainer units
Mandible1. Lingual Plate Major Connector
2. Lingual Bar Major Connector
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3. Double lingual bar
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Joining the saddles and retainer units
Maxilla
Ring design
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Palatal horseshoe
Palatal strap
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FIFTH STAGE
Indirect Retainers
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Factors influencing effectiveness of indirect retainer:•1-Distence from the fulcrum line,•2-Effectiveness of tooth support.•3-Effectiveness of direct retainers.•4-Regidity of the connector supporting the indirect retainer.•5- Indirect retainer must be rigid.
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Resistance: means resistance to antero-posterior movement.
In the mandibleIt come from…1. Posterior slope of retromolar area.2. Mesialy placed occlusal rest.3. Embrassure hook.
4. In Maxilla:
5. It come from…6. -------------------7. 1-Posterior placed occlusal rests.8. 2 – Anterior slop of the palate
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