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The Rotaflex total knee replacement--a 5 year review
1Department of Orthopaedics, Whipps Cross Hospital, Leytonstone, London, UK.
Journal of the Royal College of Surgeons of Edinburgh
|June 1, 1997
Summary
The Rotaflex total knee arthroplasty showed significant complications and poor functional outcomes in a retrospective analysis. High rates of infection, fracture, and patellar issues led to its discontinuation in practice.
Area of Science:
- Orthopedic Surgery
- Biomedical Engineering
- Materials Science
Background:
- Total knee arthroplasty (TKA) is a common procedure for end-stage knee arthritis.
- The Rotaflex prosthesis was designed to address limitations of previous knee replacement designs.
- Evaluating the long-term outcomes and complication rates of specific TKA implants is crucial for clinical practice.
Purpose of the Study:
- To retrospectively analyze the clinical outcomes and complication rates of the Rotaflex total knee arthroplasty.
- To assess the functional results and patient-reported outcomes following Rotaflex implantation.
- To identify design-related issues contributing to implant failure or poor performance.
Main Methods:
- Retrospective analysis of 56 Rotaflex TKAs in 43 patients.
- Clinical evaluation using the British Orthopaedic Association (BOA) knee assessment protocol.
- Assessment of pre-operative and post-operative knee scores, focusing on pain and flexion.
Main Results:
- Mean follow-up of 55.7 months.
- Overall improvement in knee scores, with greatest gains in pain relief and flexion.
- High incidence of complications including wound infections, dehiscence, prosthesis fractures, patellar dislocations/subluxations, deep infections, aseptic loosening, and severe patellar wear.
- Patellar wear attributed to the absence of a femoral groove in the implant design.
Conclusions:
- The Rotaflex TKA demonstrated a high rate of complications and suboptimal functional results.
- Design flaws, specifically the lack of a femoral groove, contributed to significant patellar wear.
- The study concludes that the Rotaflex knee prosthesis is not suitable for current clinical practice due to its poor performance and complication profile.