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
4- Joining the saddles and retainer units
:Joining the saddles and retainer units
Mandible1. Lingual Plate Major Connector
2. Lingual Bar Major Connector
3. Double lingual bar
Joining the saddles and retainer units
Maxilla
Ring design
Palatal horseshoe
Palatal strap
FIFTH STAGE
Indirect Retainers
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.
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