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Related Experiment Videos

Total knee arthroplasty in osteonecrosis.

N R Bergman1, J A Rand

  • 1Department of Orthopedics, Mayo Clinic, Rochester, Minnesota 55905.

Clinical Orthopaedics and Related Research
|December 1, 1991
PubMed
Summary

Total knee arthroplasty significantly improved patient outcomes, with 87% achieving good or excellent results. Implant survivorship was projected at 85% at five years, indicating a successful surgical intervention for knee pain.

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Area of Science:

  • Orthopedic Surgery
  • Biomedical Engineering

Background:

  • Total knee arthroplasty (TKA) is a common procedure for end-stage knee arthritis.
  • Assessing long-term outcomes and implant survivorship is crucial for patient management.

Purpose of the Study:

  • To evaluate the clinical outcomes and implant survivorship of total knee arthroplasties.
  • To determine the effectiveness of TKA in improving patient function and reducing pain.

Main Methods:

  • Retrospective study of 38 TKAs in 36 patients.
  • Follow-up evaluation at a mean of 4 years.
  • Assessment using the Hospital for Special Surgery (HSS) knee score.

Main Results:

  • The HSS knee score improved significantly from 59 before surgery to 83 post-surgery (p < 0.0001).

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  • 87% of patients achieved good or excellent results.
  • Predicted five-year implant survivorship was 85% (revision endpoint) or 68% (revision for pain).
  • One deep infection occurred; no loosening was observed.

    • Conclusions:

    • Total knee arthroplasty demonstrates favorable clinical outcomes and high patient satisfaction.
    • Implant survivorship is robust, though revision rates may increase when considering pain as an endpoint.
    • TKA is an effective treatment for debilitating knee conditions, with a low risk of mechanical failure.