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Soft-tissue response to total hip surface replacement.

H B Skinner, M F Mabey

    Journal of Biomedical Materials Research
    |May 1, 1987
    PubMed
    Summary
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    Prosthetic wear debris significantly increases tissue reaction after hip replacement. Ground reaction force may predict debris amount and pain severity, but not component loosening directly.

    Area of Science:

    • Orthopedic Surgery
    • Biomaterials Science
    • Biomechanical Engineering

    Background:

    • Prosthetic wear debris is a known factor in implant loosening and adverse tissue reactions.
    • Understanding the relationship between wear debris, tissue response, and biomechanical forces is crucial for improving total hip arthroplasty outcomes.

    Purpose of the Study:

    • To investigate the tissue reaction to wear debris from carbon and cobalt-chromium-molybdenum (CoCrMo) prostheses.
    • To determine the relationship between tissue response, prosthetic loosening, and ground reaction force (GRF).

    Main Methods:

    • Eighteen dogs underwent hip surface replacement with either carbon or CoCrMo prostheses articulating against polyethylene acetabular components.
    • Tissue response was evaluated after one year using a semiquantitative method, generating a total tissue score.

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  • Gait analysis was performed to measure vertical ground reaction force (GRF).

    • Main Results:

    • Both prosthetic hip types showed significantly greater tissue response compared to controls (p = .001).
    • Wear debris amount was the best predictor of component loosening.
    • A negative correlation was found between GRF and total tissue score (p = .036), and between GRF and wear debris score (p = .034).

    Conclusions:

    • Ground reaction force may predict wear debris accumulation in total hip arthroplasty tissues.
    • Severity of pain appears related to the degree of tissue response around the prosthesis.