1. Planning the design for removable partial dentures (part 2)
. Prof Dr.Ahlam El-Sharkawy
Pharos university in Alexandria

2. 4- Joining the saddles and retainer units

3. :Joining the saddles and retainer units
Mandible
1. Lingual Plate
Major Connector
2. Lingual Bar

6. 3. Double lingual bar

7. Joining the saddles and retainer units
Maxilla
Ring design

8. Palatal horseshoe
Palatal strap

11. Fifth stage
Indirect Retainers

25. 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.

26. Resistance: means resistance to antero-posterior movement.
In the mandible
It come from…
Posterior slope of retromolar area.
Mesialy placed occlusal rest.
Embrassure hook.
In Maxilla:
1-Posterior placed occlusal rests.
2 – Anterior slop of the palate