https://www.dropbox.com/s/239jwdbylob4ggu/prosto%202_0001.wmv?dl=0 https://www.dropbox.com/s/rc5r1wyjqggplme/prosto_0001.wmv?dl=0

1. Principles in metallic RPD design
11-5-2016
By : Cezar Lahham
Supervisors : Dr Walla’ Hamadneh
Dr Mutaz Arman

2. Outline :
 Chapter 4:
Biomechanics of
Removable
Partial Dentures
 Chapter 10:
Principles of
Removable Partial
Denture Design
1- Revision : 4 min
2-

3. Kennedy Classification

4. Support Types
 Totally Tissue support
 Tooth-tissue support
 Totally tooth support

6. Canadian dentist, in 1926
Ante's law refers to a group of proposals related to crown-to-root ratio

7. Support
 Class I + II = Tooth-tissue Support
 Class III + IV = Totally tooth support or
tooth-tissue support
Ref; http://www.oxfordreference.com/view/10.1093/oi/authority.20110803095415976

8. RPD Components

10. Fulcrum Line

12. Lever

13. In RPD !!!
Rest
Connector
Lever Class 1

14. Video::: class 2
 prosto_0001.wmv
prosto 2_0001.wmv
1
2

15. Clasp

16. Class III :

17. The Design of RPD
 Who draw the design of RPD ??

18. The Design of RPD
- Simple
- Obtain good base adaptation
- Use what is present (e.g. existing rest seats)
- Plan for the future
- Occlusion
- At the end of treatment

19. Steps
 1- determine the Class
 2- Type of support
 3- OSCAR
outline
Support
Connectors
Retention
:rests + indirect retainers

20. Components design
 Rest :
Incisal,Lingual,Embrasure,occlusal,Onlay
 IR: Double bar,Strap ,occlsal,….
 Connectors : -Upper: 1-Full Palatal plate
2-AP.P.P 3-A P P 4-P strap
-Lower :1-Lingual bar 2-Double lingual 3-L. Strap
4-Labial bar
Revision

21.  Clasps : Supra&infralbulge
1-Circlet 2–embrasure”double aker’s”
3-Ring 4-reverse action “fish hock”
5-Onlay
6-back action
7-continous
Revision

22.  RPI system
 RPA system
 Combination clasp
 Half and half clasp
Revision

23. Class I + II
Tooth-tissue support
Rest:Mesially
Indirect Retainer
Connectors
Clasps infra

24. Class III + VI
Tooth support
Rests: close to the edentulous area
No need to indirect retainer
Connectors
Clasps supra

25. Examples ::

29. References