使用定制器械改善全膝关节置换术中股骨组件的旋转。
Improved femoral component rotation in TKA using patient-specific instrumentation.
作者信息
Heyse Thomas J, Tibesku Carsten O
机构信息
Department of Orthopedics and Rheumatology, University Hospital Marburg, Germany.
Sporthopaedicum Straubing, Bahnhofplatz 27, 94315 Straubing, Germany.
出版信息
Knee. 2014 Jan;21(1):268-71. doi: 10.1016/j.knee.2012.10.009. Epub 2012 Nov 8.
BACKGROUND
Patient-specific instrumentation (PSI) was introduced in an attempt to reduce positional outliers of components in total knee arthroplasty (TKA). It was hypothesized that PSI could help with the positioning of femoral components in optimal rotational alignment.
METHODS
A magnetic resonance imaging (MRI) analysis of 94 patients following TKA was conducted. Of these, 46 operations were performed using PSI and 48 using conventional instrumentation. The rotation of the femoral components was determined in the MRI and deviations>3° were considered outliers. Data were analyzed for positional outliers, observer reliability, and a variance comparison between implant groups.
RESULTS
There was excellent inter- and intraobserver reliability with low standard deviations for the determination of femoral component rotation. There were significantly more outliers in the conventional (22.9%) group than in the PSI group (2.2%, p=0.003).
CONCLUSION
In this setup, PSI was effective in significantly reducing outliers of optimal rotational femoral component alignment during TKA.
背景
引入定制化器械（PSI）旨在减少全膝关节置换术（TKA）中组件的位置异常情况。据推测，PSI有助于将股骨组件定位在最佳旋转对线位置。
方法
对94例行TKA术后的患者进行了磁共振成像（MRI）分析。其中，46例手术使用了PSI，48例使用了传统器械。通过MRI确定股骨组件的旋转情况，偏差>3°被视为异常值。对数据进行了位置异常值、观察者可靠性以及植入物组间方差比较的分析。
结果
在确定股骨组件旋转方面，观察者间和观察者内的可靠性极佳，标准差较低。传统组（22.9%）的异常值明显多于PSI组（2.2%，p=0.003）。
结论
在此设置下，PSI在显著减少TKA期间股骨组件最佳旋转对线的异常值方面是有效的。
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