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[Biomechanic considerations in wrist prostheses]
1Clinique de l'Yvette, Longjumeau.
Annales De Chirurgie De La Main Et Du Membre Superieur : Organe Officiel Des Societes De Chirurgie De La Main = Annals of Hand and Upper Limb Surgery
|January 1, 1992
Summary
Wrist replacement surgery, specifically first carpal row avulsion, is common. Future wrist prostheses aim to improve function and longevity, potentially replacing current techniques.
Area of Science:
- Orthopedic surgery
- Biomedical engineering
- Hand surgery
Context:
- Current treatment for wrist disorders often involves first carpal row avulsion as a last resort.
- Existing wrist prostheses are categorized into three-axis (spherical) and two-axis (universal joint) types.
- Three-axis prostheses have limitations in transmitting pronation-supination torque.
Purpose:
- To review existing wrist prostheses and outline ideal characteristics for future designs.
- To compare the functional capabilities of different wrist prosthesis designs.
- To identify key features for advanced wrist implant development.
Summary:
- Two-axis (universal joint) prostheses can transmit pronation-supination torque, unlike three-axis designs.
- Ideal future wrist prostheses should be based on the universal joint principle, be compact, isometric, maintain tendon tension, and align with the wrist's true axis.
- These advanced prostheses should be cementlessly fixed, resist shortening, offer mechanical flexibility, and be modular for easy replacement.
Impact:
- The development of an ideal wrist prosthesis could significantly improve patient outcomes and quality of life.
- Advanced prosthetics may eventually supersede current surgical techniques like first carpal row avulsion.
- This research guides the future of wrist arthroplasty and implant design.