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Design of a total wrist prosthesis.

Y Youm, A E Flatt

Annals of Biomedical Engineering

|January 1, 1984

Summary

Understanding normal wrist joint mechanics is crucial for designing effective prostheses for conditions like rheumatoid arthritis. This study analyzed wrist kinematics and kinetics to inform the development of a new total wrist replacement.

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Area of Science:

Biomechanics
Orthopedic Surgery
Biomedical Engineering

Background:

Rheumatoid arthritis and other conditions necessitate wrist joint replacement to alleviate pain and restore function.
Current prosthetic designs require optimization based on a thorough understanding of normal wrist biomechanics.
Kinematic and kinetic parameters of the healthy wrist joint are essential for developing improved prostheses.

Purpose of the Study:

To investigate the kinematic and kinetic behavior of a normal wrist joint.
To establish design criteria for total wrist prostheses based on normal wrist joint parameters.
To design and evaluate a novel universal, constrained, total wrist replacement.

Main Methods:

An experimental and analytical study was conducted to gather data on normal wrist joint parameters.
The significance of these parameters was assessed for their application in prosthesis design.
A new universal, constrained, total wrist prosthesis was designed.
The designed prosthesis was compared to existing prostheses through laboratory experiments.

Main Results:

Key kinematic and kinetic parameters of the normal wrist joint were identified and quantified.
The study provided crucial data for the design criteria of wrist prostheses.
A novel universal, constrained, total wrist replacement was developed.
Comparative laboratory experiments were performed to evaluate the new prosthesis.

Conclusions:

A comprehensive understanding of normal wrist joint biomechanics is fundamental for effective prosthetic design.
The developed universal, constrained, total wrist replacement shows potential for improved patient outcomes.
Further research and clinical evaluation are warranted for the new prosthetic design.

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