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Spherocentric knee arthroplasty.

H Kaufer, L S Matthews

    Clinical Orthopaedics and Related Research
    |November 1, 1979
    PubMed
    Summary
    This summary is machine-generated.

    The spherocentric knee prosthesis offers excellent outcomes for severe knee instability or deformity. This advanced implant demonstrates superior stability, pain relief, and function with low complication rates.

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    Area of Science:

    • Orthopedic Surgery
    • Biomedical Engineering
    • Materials Science

    Background:

    • Severe knee instability and deformity present complex challenges for total knee arthroplasty.
    • Traditional prostheses may not provide optimal results in these complex cases.
    • The spherocentric knee prosthesis was developed to address these limitations.

    Purpose of the Study:

    • To evaluate the clinical outcomes of the spherocentric knee prosthesis in patients with severe knee instability or deformity.
    • To assess the prosthesis's design features, including triaxial rotation, intrinsic stability, and wear minimization.
    • To compare the complication rates of the spherocentric prosthesis with other knee arthroplasty systems.

    Main Methods:

    • Surgical arthroplasty using the spherocentric knee prosthesis in 134 knees with severe instability or deformity.

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  • Follow-up averaging nearly 3 years (range 1-5 years).
  • Assessment of deformity correction, stability, range of motion, pain, function, and complications (infection, loosening, fracture).

    • Main Results:

    • Outstanding results in deformity correction, improved stability, range of motion, pain relief, and function.
    • Low rates of infection, loosening, and adjacent bone fracture compared to hinge prostheses and resurfacing prostheses.
    • No within-prosthesis failures; all loosening occurred at the prosthesis-bone interface.

    Conclusions:

    • The spherocentric knee prosthesis is the preferred choice for total knee arthroplasty in cases of severe preoperative deformity or instability.
    • Its design facilitates triaxial rotation and intrinsic stability, leading to excellent clinical outcomes.
    • The prosthesis demonstrates a favorable safety profile with low complication rates in complex knee arthroplasty cases.