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Hinged knee replacement in revision arthroplasty.
Clinical Orthopaedics and Related Research
|July 1, 1987
Summary
Stanmore hinged knee replacements used for revision arthroplasty showed poor outcomes in most patients. These hinged implants may have limited use in revision knee surgery due to suboptimal results.
Area of Science:
- Orthopedic Surgery
- Biomedical Engineering
Background:
- Revision knee arthroplasty is a complex procedure to address failed primary knee replacements.
- Hinged knee implants are sometimes used in revision settings due to their stability.
Purpose of the Study:
- To evaluate the clinical outcomes of Stanmore hinged knee replacements when used as revision arthroplasties.
- To identify factors influencing the success of hinged knee revision surgery.
Main Methods:
- A retrospective review of 52 patients who underwent Stanmore hinged knee revision arthroplasty.
- Clinical and radiological follow-up for a mean of 44.7 months.
- Assessment of functional outcomes and complications including loosening and infection.
Main Results:
- Overall, 29% of patients had poor clinical results, with only 23% achieving good outcomes.
- Revision of bulkier or more constrained primary knee joints was associated with worse results.
- A 4% infection rate was observed, with no clinical evidence of loosening at the latest follow-up.
Conclusions:
- Stanmore hinged knee revision arthroplasty demonstrated a high rate of poor clinical outcomes.
- The effectiveness of hinged knee implants in revision arthroplasty is limited, especially when revising complex primary designs.
- Newer generations of knee arthroplasty devices may offer better alternatives for revision surgery.