Efe Turgay, El Zayat Bilal Farouk, Heyse Thomas J, Timmesfeld Nina, Fuchs-Winkelmann Susanne, Schmitt Jan
Department of Orthopaedics and Rheumatology, University Hospital Marburg, Baldingerstrasse, D-35043 Marburg, Germany.
Acta Orthop Belg. 2011 Oct;77(5):616-21.
The purpose of the present study was to evaluate the precision of digital templating in total hip arthroplasty (THA) and the influence of the surgeons' level of experience on the accuracy of preoperative planning. A retrospective review of digital computer planned THA's was performed on 169 hips. The preoperatively planned component sizes were compared to the sizes used in the operation. An exact agreement between planned and actually used size was achieved in 33.7% of the hips for the acetabular cups and 36% for the femoral stems. A prediction of +/- 1 size was reached in 77.5% for acetabular components and 82.3% for the femoral stem. On average, the acetabular components were planned approximately 0.9 sizes too large, the femoral stems 0.3 sizes too small. The accuracy of preoperative planning showed no differences according to the level of training of the planning surgeon. We state that the digital templating is useful to predict the implant size. However, 15 of the 169 planned components showed a difference of more than 2 sizes. Therefore, digital templating cannot fully replace intraoperative X-ray use.
本研究的目的是评估全髋关节置换术(THA)中数字模板的精度以及外科医生经验水平对术前规划准确性的影响。对169例髋关节进行了数字计算机规划的THA回顾性研究。将术前规划的假体尺寸与手术中使用的尺寸进行比较。髋臼杯在33.7%的髋关节中、股骨柄在36%的髋关节中实现了规划尺寸与实际使用尺寸的完全一致。髋臼组件有77.5%、股骨柄有82.3%达到了±1个尺寸的预测。平均而言,髋臼组件规划得大约大0.9个尺寸,股骨柄规划得小0.3个尺寸。术前规划的准确性根据规划外科医生的培训水平没有差异。我们认为数字模板有助于预测植入物尺寸。然而,169个规划组件中有15个显示出超过2个尺寸的差异。因此,数字模板不能完全取代术中X线的使用。