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Related Experiment Videos

The total condylar knee prosthesis: the first 5 years.

J Insall, A J Tria, W N Scott

    Clinical Orthopaedics and Related Research
    |November 1, 1979
    PubMed
    Summary

    The total condylar knee prosthesis offers excellent outcomes for knee replacement surgery, with 91.5% of patients achieving good or excellent results. This advanced prosthesis shows durability and compares favorably to total hip arthroplasty.

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    Area of Science:

    • Orthopedic Surgery
    • Biomedical Engineering
    • Reconstructive Surgery

    Background:

    • The total condylar knee prosthesis evolved from prior prosthetic designs at the Hospital for Special Surgery.
    • Evolution included advancements like patellar resurfacing and modifications leading to the total condylar knee prosthesis II (cruciate substituting) and III (increased constraint).

    Purpose of the Study:

    • To evaluate the clinical outcomes and long-term efficacy of the total condylar knee prosthesis.
    • To assess the prosthesis's performance in osteoarthritic and rheumatoid knees.
    • To analyze complication rates and reoperation frequency.

    Main Methods:

    • A retrospective review of 461 total condylar knee arthroplasties with 1-5 years of follow-up.
    • Surgical technique involved ligamentous balancing and soft-tissue release for deformity correction.

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  • Outcomes were assessed using the Hospital for Special Surgery Knee Rating Scale.

    • Main Results:

    • Overall excellent or good results were achieved in 91.5% of cases (312 excellent, 109 good).
    • Osteoarthritic knees (93.5% excellent/good) performed slightly better than rheumatoid knees (87% excellent/good).
    • Complications included 6 infections, 6 subluxations, and 10 component loosenings, with 15 reoperations (3%).

    Conclusions:

    • The total condylar knee prosthesis demonstrates excellent clinical outcomes and durability.
    • Results are comparable in quality to total hip arthroplasty and remain stable over time.
    • The prosthesis is effective for both osteoarthritic and rheumatoid knee conditions.