Bragdon Charles R, Martell John M, Greene Meridith E, Estok Daniel M, Thanner Jonas, Kärrholm Johan, Harris William H, Malchau Henrik
Orthopaedic Biomechanics and Biomaterials Laboratory and the Adult Reconstructive Unit of the Department of Orthopaedic Surgery of Massachusetts General Hospital and Harvard Medical School, Boston, 02114, USA.
Clin Orthop Relat Res. 2006 Jul;448:52-7. doi: 10.1097/01.blo.0000224018.88410.83.
Radiostereometry has high precision and accuracy measuring polyethylene wear in total hip arthroplasty but requires a specialized setup. The Martell method is simpler and can be used on larger populations. The hypothesis that the radiostereometry analysis and the Martell analysis would yield comparable wear data from the same group of patients having total hip arthroplasty was tested. A group of twenty-five total hip arthroplasty patients who had both radiostereometry and standard anterior-posterior pelvic and cross-table lateral radiographs of sufficient quality for analysis were identified. The films were taken at postoperative periods of 6 weeks, 1 year, 2 years, and 5 years. Femoral head penetration was measured by both methods at each time point. The median penetration rates measured by each method decreased over time. Penetration results were affected by method of analysis, time, and dimension, with greater penetration for Martell compared with radiostereometry at each time point, greater penetration with increasing time for each method, and larger three-dimensional magnitude compared with two-dimensional analysis.
Case series Level IV. See Guidelines for Authors for a complete description of levels of evidence.
放射性立体测量法在测量全髋关节置换术中聚乙烯磨损方面具有高精度和准确性，但需要专门的设置。马特尔方法更简单，可用于更大的人群。对放射性立体测量分析和马特尔分析能否从同一组接受全髋关节置换术的患者中得出可比的磨损数据这一假设进行了检验。确定了一组25名接受全髋关节置换术的患者，他们同时拥有质量足以进行分析的放射性立体测量图像以及标准的前后位骨盆和交叉台面侧位X线片。这些片子在术后6周、1年、2年和5年时拍摄。在每个时间点通过两种方法测量股骨头的穿透情况。每种方法测量的中位穿透率随时间下降。穿透结果受分析方法、时间和维度的影响，在每个时间点，马特尔方法测量的穿透率高于放射性立体测量法，每种方法的穿透率随时间增加而增大，与二维分析相比，三维测量值更大。
病例系列IV级。有关证据水平的完整描述，请参阅作者指南。
