Rpd biomechanics principles of levers design consideration 4th year
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Biomechanics of Removable partial denture & Design considerations
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Transcript of Rpd biomechanics principles of levers design consideration 4th year
Biomechanics of Removable partial denture &Design considerations
Biomechanics
Inclined plane
Stress consideration in a partial denture
Horizontal stress
MOVEMENTS OF REMOVABLE PARTIAL DENTURES
CLASS I AND II
Rotational movements
Free end saddle (distal extension)
The amount of stress transmitted to the abutment depend on:
Improving and reducing the free end saddle problems
1 - Decreasing the occlusal load
Load reduction
2 - Improving Retention
What is the RPI
Anterior placement of the rest
Indirect Retainer (IR)
Indirect Retainer (IR)
Abutment Tooth Modification
Retention
3 - Support
A- Wide load distribution
Tooth Support for Distal EXtension
Improving and reducing the free end saddle problems
MOVEMENTS OF REMOVABLE PARTIAL DENTURES
Advantages of Placing the occlusal rest away from the distal
extension base
Remember: to solve class I and II RPD problems
Differences between Tooth supported (III & IV) and Tooth-tissue supported (I & II)
Thank You
