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Component asymmetry in simultaneous bilateral total knee arthroplasty
Craig M Capeci1, Edward C Brown, Giles R Scuderi
1Department of Orthopedics, New York University School of Medicine, New York, New York, USA.
The Journal of Arthroplasty
|August 1, 2006
Summary
Component size asymmetry is common in bilateral total knee arthroplasty (TKA). However, asymmetric TKAs showed no difference in knee scores or range of motion compared to symmetric procedures.
Area of Science:
- Orthopedic Surgery
- Biomedical Engineering
Background:
- Bilateral total knee arthroplasty (TKA) is a common procedure for treating knee osteoarthritis.
- Assessing component size symmetry is crucial for optimizing surgical outcomes.
Purpose of the Study:
- To determine the incidence of component size asymmetry in bilateral TKA.
- To evaluate the impact of component asymmetry on patient outcomes.
Main Methods:
- Retrospective review of 253 patients undergoing simultaneous or same-day bilateral TKA.
- Analysis of component sizes for femoral, tibial, and patellar implants.
- Comparison of knee scores and range of motion between symmetric and asymmetric TKA groups.
Main Results:
- Component asymmetry was observed in 8.7% of femoral, 6.7% of tibial, and 5.1% of patellar components.
- No significant difference in knee scores or range of motion was found between symmetric and asymmetric TKA.
- Higher asymmetry rates were noted for anterior-referenced femoral components.
Conclusions:
- Component size asymmetry is a frequent occurrence in bilateral TKA.
- Current asymmetry does not appear to negatively impact short-term patient outcomes.
- Further investigation is needed to understand the significance of asymmetric component sizing, particularly for anterior-referenced femoral components.