Department of Orthopaedic Surgery, Lilavati Hospital & Research Centre, Mumbai, India.
J Arthroplasty. 2011 Jan;26(1):82-7. doi: 10.1016/j.arth.2009.11.023. Epub 2010 Feb 19.
We analyzed alignment of 300 knees, divided equally into groups according to total knee arthroplasty technique: Conventional, CAS-Early (computer-assisted surgery during the surgeon's learning curve), and CAS-Late (after experience with CAS). With the margin of error for alignment of the mechanical axis and femoral and tibial components each within ±3°, the Conventional group's success rate was only 66%; but the rate for the CAS-Early group was 94%. The CAS-Late group's rate was 100%, with no outliers; moreover, the margin of error was reduced to within ±2° in 92% of patients and within ±1° in 52%. For the Conventional group's success rate to be 100%, the margin of error would have to be statistically relaxed to an unacceptable ±8°. Computed-assisted surgery improves alignment even early in the learning curve.
我们分析了 300 个膝关节的对线情况，根据全膝关节置换技术将其平均分为三组：常规组、CAS-早期组（术者学习曲线期间的计算机辅助手术）和 CAS-晚期组（有计算机辅助手术经验后）。对线的机械轴和股骨及胫骨组件的误差允许度均为±3°，常规组的成功率仅为 66%；而 CAS-早期组的成功率为 94%。CAS-晚期组的成功率为 100%，无离群值；此外，92%的患者误差允许度降低至±2°以内，52%的患者误差允许度降低至±1°以内。为使常规组的成功率达到 100%，误差允许度必须放宽至统计学上不可接受的±8°。即使在学习曲线的早期阶段，计算机辅助手术也能改善对线。
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