Floerkemeier Thilo, Schwarze Michael, Hurschler Christof, Gronewold Jens, Windhagen Henning, von Lewinski Gabriela, Budde Stefan
Department of Orthopaedic Surgery, Hannover Medical School, Anna-von-Borries-Str. 1-7, 30625 Hannover, Germany.
Laboratory for Biomechanics and Biomaterials, Department of Orthopaedic Surgery, Hannover Medical School, Anna-von-Borries-Str. 1-7, 30625 Hannover, Germany.
Biomed Res Int. 2017;2017:8756432. doi: 10.1155/2017/8756432. Epub 2017 Apr 13.
Over the last decade, the number of short stem total hip arthroplasty procedures has increased. Along with the possible benefits associated with short stems is a smaller implant-bone contact surface, which may have a negative influence on primary stability and impair osseointegration. Previous studies observed migration of short stems, especially within the first three months. The variables that influence migration in short stem hip implants remain unknown. Therefore, the purpose of this study was to associate the migration of short stems with its possible influencing variables. Migration data from two different short stem studies were retrospectively analyzed. Migration within the first two postoperative years was determined by model-based Roentgen stereophotogrammetric analysis. Migration was correlated to bearing couple, type and size of stem, size of acetabular cup, and age, gender, weight, and height of patients using a multiple factor analysis. Eigenvalue analysis explained 80.7% of the overall variance for the first three dimensions. The four most dominant variables in the first dimension were weight, stem size, acetabular cup size, and patient height (correlations of 0.81, 0.80, 0.71, and 0.70, resp.). None of the analyzed parameters (bearing couple, type and size of stem, size of acetabular cup, and age, gender, weight, and height of patients) affected the migration pattern of short stem THA with primary metaphyseal fixation.
在过去十年中，短柄全髋关节置换手术的数量有所增加。与短柄相关的可能益处伴随着较小的植入物-骨接触表面，这可能对初始稳定性产生负面影响并损害骨整合。先前的研究观察到短柄的移位，尤其是在最初三个月内。影响短柄髋关节植入物移位的变量仍然未知。因此，本研究的目的是将短柄的移位与其可能的影响变量联系起来。对来自两项不同短柄研究的移位数据进行了回顾性分析。术后头两年内的移位通过基于模型的X线立体摄影测量分析来确定。使用多因素分析将移位与承重关节、柄的类型和尺寸、髋臼杯的尺寸以及患者的年龄、性别、体重和身高相关联。特征值分析解释了前三个维度总体方差的80.7%。在第一维度中四个最主要的变量是体重、柄尺寸、髋臼杯尺寸和患者身高（相关系数分别为0.81、0.80、0.71和0.70）。所分析的参数（承重关节、柄的类型和尺寸、髋臼杯的尺寸以及患者的年龄、性别、体重和身高）均未影响具有干骺端初次固定的短柄全髋关节置换术的移位模式。
