Pailhé Régis, Reina Nicolas, Ancelin David, Cavaignac Etienne, Maubisson Laurent, Sharma Akash, Chiron Philippe
The Orthopaedic and Traumatology Department, Rangueil University Hospital, Toulouse Cedex, France,
Eur J Orthop Surg Traumatol. 2014 May;24(4):519-23. doi: 10.1007/s00590-013-1218-x. Epub 2013 Apr 5.
To determine whether femoral implant position can be reproducibly measured on plain digital radiographs, we prospectively studied 40 patients after hip resurfacing arthroplasty. Three observers performed double blinded randomized analysis of calibrated digital radiographs meeting strict quality criteria. The implant stem-shaft angle and femoral anteversion angle were measured by the trapezoid method of axis determination using OsiriX software. The upper and lower offset and the anterior and posterior offset were measured. The statistical analysis was performed using Pearson correlation tests (intra-observer reproducibility) and Fisher F tests (inter-observer reproducibility). Intra-observer reproducibility was very good for all parameters and all observers. Inter-observer reproducibility was excellent except for superior offset measurement. Thus, this study validates a radiographic method for assessing the femoral implant position in hip resurfacing. We believe this could be useful for future studies on hip resurfacing devices.
为了确定在普通数字X线片上能否可重复地测量股骨植入物位置，我们对40例髋关节表面置换术后患者进行了前瞻性研究。三名观察者对符合严格质量标准的校准数字X线片进行双盲随机分析。使用OsiriX软件通过梯形轴测定法测量植入物的柄干角和股骨前倾角。测量上下偏移和前后偏移。使用Pearson相关检验（观察者内重复性）和Fisher F检验（观察者间重复性）进行统计分析。所有参数和所有观察者的观察者内重复性都非常好。除了上偏移测量外，观察者间重复性极佳。因此，本研究验证了一种用于评估髋关节表面置换术中股骨植入物位置的影像学方法。我们认为这可能对未来关于髋关节表面置换装置的研究有用。
