Rests: Provide vertical support and stabilize the prosthesis. Furthermore, the denture base must be extended to the maximum possible area, ensuring adequate support and dispersion of occlusal loads onto the residual ridge, thereby reducing the stress transmitted to the abutment teeth.
Kennedy Class 2 RPD Design Principles and Key Biomechanical Strategies
For unilateral distal extension cases, a lingual bar is often the connector of choice, offering minimal tissue coverage and maximum patient comfort. The remaining teeth, usually canines and premolars, serve as the primary abutments, bearing the load of the prosthesis.
The strategic placement of an indirect retainer is non-negotiable; it is typically positioned on the opposite side of the fulcrum line, often utilizing a mesial rest on a canine, to counter the lifting action of the distal extension base and stabilize the prosthesis against horizontal movement. The primary edentulous span typically involves the molar region, which is critical for masticatory function and force distribution.
Kennedy Class 2 RPD Design Principles and Key Biomechanical Strategies
Direct Retainers (Clasps): Offer retention through flexible engagement of undercuts. Biomechanical Strategies for Long-Term Success Mastering Kennedy Class II design involves a delicate balance between retention, support, and stability.
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