Valley Orthopaedics, Seattle, Washington.
Summit Orthopaedics, Woodbury, Minnesota.
J Arthroplasty. 2014 Feb;29(2):343-7. doi: 10.1016/j.arth.2013.06.029. Epub 2013 Aug 29.
Patient specific instrumentation (PSI) was developed to increase total knee arthroplasty (TKA) accuracy and efficiency. The study purpose was to compare immediate post-operative mechanical alignment, achieved using PSI, with conventional and computer assisted surgery (CAS) instruments in high volume TKA practices. This prospective, multicenter, non-randomized study accrued 66 TKA patients using PSI. A computed tomography (CT) based algorithm was used to develop the surgical plan. Sixty-two percent were females, 99% were diagnosed with osteoarthritis, average age at surgery was 66 years, and 33 was the average body mass index. A historical control group was utilized that underwent TKA using conventional instruments (n=86) or CAS (n=81), by the same set of surgeons. Postoperative mechanical alignment was comparable across the groups. Operative time mean and variance were significant.
患者特定仪器（PSI）的开发旨在提高全膝关节置换术（TKA）的准确性和效率。本研究旨在比较高容量 TKA 实践中使用 PSI 获得的即刻术后机械对线与传统和计算机辅助手术（CAS）器械的结果。这项前瞻性、多中心、非随机研究共纳入了 66 例使用 PSI 的 TKA 患者。使用基于计算机断层扫描（CT）的算法来制定手术计划。女性占 62%，99%的患者被诊断为骨关节炎，手术时的平均年龄为 66 岁，平均体重指数为 33。还使用了一个历史对照组，这些患者接受了由同一组医生使用传统器械（n=86）或 CAS（n=81）进行的 TKA。各组术后机械对线相当。手术时间均值和方差有显著差异。
