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Kinematic total knee replacement.

F C Ewald, M A Jacobs, R E Miegel

    The Journal of Bone and Joint Surgery. American Volume
    |September 1, 1984
    PubMed
    Summary
    This summary is machine-generated.

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    Kinematic condylar total knee replacements show excellent outcomes in 90% of patients, with good range of motion and a favorable bone-cement interface. Metal-backed tibial components may reduce bone-cement reactions.

    Area of Science:

    • Orthopedic Surgery
    • Biomaterials Engineering

    Background:

    • Total knee replacement (TKR) is a common procedure for knee osteoarthritis and rheumatoid arthritis.
    • Assessing the long-term efficacy and complications of kinematic condylar TKR is crucial for patient outcomes.

    Purpose of the Study:

    • To evaluate the clinical outcomes and radiographic findings of kinematic condylar total knee replacements.
    • To compare the bone-cement interface reaction between metal-backed and plastic tibial components.

    Main Methods:

    • Retrospective review of 124 kinematic condylar total knee replacements in 91 patients.
    • Follow-up period of 2 to 4 years postoperatively.
    • Assessment of clinical ratings, range of motion, and radiographic evidence of radiolucency.

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    Main Results:

    • 90% of TKRs were rated as good or excellent.
    • Average active postoperative flexion was 106 degrees.
    • Insignificant radiolucent lines were observed in 18% of knees.
    • Metal-backed tibial components showed less bone-cement interface reaction compared to plastic components.
    • Stair-climbing ability was more affected by multi-joint involvement than patellar resurfacing.

    Conclusions:

    • Kinematic condylar TKR, when meticulously performed, yields predictably good to excellent results.
    • Metal-backed tibial components appear to offer advantages regarding bone-cement interface reaction.
    • Patient factors like joint involvement significantly influence functional outcomes post-TKR.