Hansen T B, Larsen K, Bjergelund L, Stilling M
Department of Orthopaedics, Section of Hand Surgery, Regional Hospital Holstebro, Holstebro, Denmark.
J Hand Surg Eur Vol. 2010 Jul;35(6):480-5. doi: 10.1177/1753193409355627. Epub 2010 Feb 24.
Both marker-based roentgen stereophotogrammetric analysis (RSA) and model-based RSA have been helpful evaluation tools in hip and knee arthroplasty. The purpose of this study was to test both model-based and marker-based RSA in the evaluation of total joint prostheses of the trapeziometacarpal joint. In a phantom study, the precision of marker-based RSA was tested with a cemented polyethylene cup and compared with the precision of model-based RSA in an uncemented Elektra screw cup. The precision of model-based RSA of the metacarpal stem was tested using an uncemented Elektra metacarpal stem. In a clinical study 11 patients had double stereo radiographs followed by RSA analysis. The precision of translation in both marker-based and model-based RSA was sufficient for clinical use, but rotation cannot be estimated with sufficient precision.
基于标志物的X线立体摄影测量分析（RSA）和基于模型的RSA都是髋关节和膝关节置换术中有用的评估工具。本研究的目的是在评估大多角骨-第一掌骨关节全关节假体时测试基于模型的RSA和基于标志物的RSA。在一项模型研究中，使用骨水泥固定的聚乙烯杯测试基于标志物的RSA的精度，并与非骨水泥固定的Elektra螺钉杯的基于模型的RSA的精度进行比较。使用非骨水泥固定的Elektra掌骨柄测试掌骨柄基于模型的RSA的精度。在一项临床研究中，11名患者进行了双立体X线摄影，随后进行RSA分析。基于标志物的RSA和基于模型的RSA在平移方面的精度足以用于临床，但旋转精度无法准确估计。
