Shin Jong Ki, Son Seung Min, Kim Tae Woo, Shin Won Chul, Lee Jung Sub, Suh Kuen Tak
Department of Orthopaedic Surgery, Pusan National University Hospital, Busan, Korea.
Department of Orthopaedic Surgery, Pusan National University Yangsan Hospital, Yangsan, Korea.
Hip Pelvis. 2016 Dec;28(4):201-207. doi: 10.5371/hp.2016.28.4.201. Epub 2016 Dec 28.
Preoperative on-screen templating is a method of using acetate templates on digital images. The aim of the present study was to evaluate the accuracy, intra- and interobserver reliabilities of preoperative on-screen templating using digital radiographs for total hip arthroplasty (THA).
Two hundred patients with hip disease who were treated with primary cementless THA were retrospectively evaluated. The accuracy of on-screen templating was assessed by comparing the predicted prosthesis sizes with the actual sizes used operatively. The inter- and intraobserver reliabilities of the templating results were also evaluated.
The prosthesis prediction accuracy within ±one size was 96.6% for the cup size and 97.8% for the stem size. The inter- and intraobserver reliabilities for the implant size were substantial (kappa>0.70). The intra- and interobserver reliabilities for the leg length discrepancy and femoral offset difference using the intraclass correlation coefficient ranged from 0.89 to 0.97.
Preoperative on-screen templating using digital radiographs showed substantial accuracy and reliability for implant prediction. It is an effective method for predicting the size of implant, correcting the leg length discrepancy and restoring the femoral offset.
术前屏幕模板制作是一种在数字图像上使用醋酸盐模板的方法。本研究的目的是评估使用数字X线片进行全髋关节置换术（THA）术前屏幕模板制作的准确性、观察者间和观察者内可靠性。
回顾性评估200例接受初次非骨水泥型THA治疗的髋关节疾病患者。通过将预测的假体尺寸与手术中实际使用的尺寸进行比较，评估屏幕模板制作的准确性。还评估了模板制作结果的观察者间和观察者内可靠性。
髋臼杯尺寸和股骨柄尺寸在±一个尺寸范围内的假体预测准确率分别为96.6%和97.8%。植入物尺寸的观察者间和观察者内可靠性较高（kappa>0.70）。使用组内相关系数，观察者内和观察者间在肢体长度差异和股骨偏移差异方面的可靠性范围为0.89至0.97。
使用数字X线片进行术前屏幕模板制作在植入物预测方面显示出较高的准确性和可靠性。它是预测植入物尺寸、纠正肢体长度差异和恢复股骨偏移的有效方法。
