Wrightington Hospital, UK.
Lancaster University, UK.
J Arthroplasty. 2014 Feb;29(2):369-72. doi: 10.1016/j.arth.2013.06.024. Epub 2013 Jul 27.
Accurate radiographic measurement of acetabular cup orientation is required in order to assess susceptibility to impingement, dislocation, and edge loading wear. In this study, the accuracy and precision of a new radiographic cup orientation measurement system were assessed and compared to those of two commercially available systems. Two types of resurfacing hip prostheses and an uncemented prosthesis were assessed. Radiographic images of each prosthesis were created with the cup set at different, known angles of version and inclination in a measurement jig. The new system was the most accurate and precise and could repeatedly measure version and inclination to within a fraction of a degree. In addition it has a facility to distinguish cup retroversion from anteversion on anteroposterior radiographs.
为了评估撞击、脱位和边缘负重磨损的易感性，需要对髋臼杯方位进行准确的放射学测量。在这项研究中，评估了一种新的放射学杯方位测量系统的准确性和精密度，并将其与两种市售系统进行了比较。评估了两种类型的表面髋关节假体和一种非骨水泥假体。在测量夹具中，将杯设置在不同的已知版本和倾斜角度，为每个假体创建放射图像。新系统最准确和精确，可以在几度的分数内重复测量版本和倾斜度。此外，它还有一种在前后位 X 线片上区分杯反转和前旋的功能。
