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Related Experiment Videos

Knee mechanisms for through-knee prostheses.

K Oberg

    Prosthetics and Orthotics International
    |August 1, 1983
    PubMed
    Summary
    This summary is machine-generated.

    Special polycentric linkage mechanisms are preferred for through-knee amputees, offering adjustable stability and function. Lighter, more compact designs are needed for younger amputees.

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    Area of Science:

    • Biomedical Engineering
    • Prosthetics and Orthotics

    Background:

    • Through-knee amputations present unique challenges for prosthetic knee design.
    • Existing knee mechanisms include metal side bars, conventional above-knee types, and specialized polycentric linkages.

    Purpose of the Study:

    • To review and analyze the principal types of knee mechanisms used for through-knee amputees.
    • To highlight the advantages of polycentric linkage mechanisms in terms of stability and functional control.

    Main Methods:

    • Review of existing prosthetic knee designs for through-knee amputees.
    • Analysis of stability diagrams related to polycentric linkage mechanisms.
    • Discussion of design considerations for stance and swing phase control.

    Main Results:

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    • Polycentric linkage mechanisms are the most widely used type for through-knee amputees, with over 50% fitting in a 1979 Swedish study.
    • These mechanisms allow for utilization of voluntary and involuntary stability.
    • Designs can be tailored for specific stance and swing phase characteristics.

    Conclusions:

    • Polycentric linkage mechanisms offer significant advantages for through-knee amputee prosthetics.
    • Further development is needed for lighter and more compact designs, particularly for pediatric and smaller individuals.