Perfect balance in total knee arthroplasty: the elusive compromise.
AI Summary
Key Findings
Abstract
A Tensor/Balancer device (Stryker Howmedica Osteonics, Allendale, NJ) was used to restore optimal stability and alignment during 83 consecutive total knee arthroplasties with a minimum of 6-week clinical and radiographic follow-up. The surgical technique is described. Mean flexion-extension symmetry was restored to within 1 degrees. Mean femoral rotation required to achieve symmetry in flexion differed between varus (4.38 degrees ) and valgus (6.0 degrees ) knees. Of 83 knees, 7 had >3 mm of subjective laxity during component trialing and were associated with a preoperative deformity of >15 degrees; 19 knees required femoral rotation of >6 degrees and were associated with greater preoperative malalignment. Postoperative knee alignment, range of motion, Knee Society score, and lateral release rate were similar between the 2 groups. The use of a Tensor/Balancer device in total knee arthroplasty can achieve outcomes comparable to existing techniques with potential for improved technical accuracy.
Affiliation
Hamilton Arthroplasty Group, Hamilton Health Sciences, Henderson General Hospital, and Faculty of Health Sciences, McMaster University, Hamilton, Ontario, Canada.
External References
- PubMed ID:
- 11805918
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