Zahn Robert K, Grotjohann Sarah, Ramm Heiko, Zachow Stefan, Putzier Michael, Perka Carsten, Tohtz Stephan
Centre for Musculoskeletal Surgery, Department for Orthopaedics, Department for Traumatology, Charité-University Medicine Berlin, Charitéplatz 1, 10117, Berlin, Germany.
Visualization & Data Analysis Medical Planning & Computational Medicine Groups, Zuse Institute Berlin (ZIB), Takustraße 7, 14195, Berlin, Germany.
Int Orthop. 2016 Aug;40(8):1571-1575. doi: 10.1007/s00264-015-2949-6. Epub 2015 Aug 30.
Pelvic tilt determines functional orientation of the acetabulum. In this study, we investigated the interaction of pelvic tilt and functional acetabular anteversion (AA) in supine position.
Pelvic tilt and AA of 138 individuals were measured by computed tomography (CT). AA was calculated in relation to the anterior pelvic plane (APP) and relative to the table plane. We analysed these parameters for gender-specific and age-related differences.
The mean pelvic tilt was -0.1 ± 5.5°. Pelvic sagittal rotation displayed no gender nor age related differences. Females showed higher angles of AA compared with males (20.0° vs 17.2°, p < 0.001; AA relative to the APP). Anterior tilting of the pelvis positively correlated with AA and individuals with high AA had a higher anterior pelvic tilt compared with those with low AA (p < 0.0001; AA relative to the APP).
AA has to be calculated regarding pelvic sagittal rotation for correct acetabular orientation. Pelvic tilt is dependent on acetabular orientation and compensates for increased AA.
骨盆倾斜决定髋臼的功能方向。在本研究中，我们调查了仰卧位时骨盆倾斜与功能性髋臼前倾角（AA）之间的相互作用。
通过计算机断层扫描（CT）测量了138例个体的骨盆倾斜度和AA。AA是相对于骨盆前平面（APP）和相对于台面平面计算得出的。我们分析了这些参数的性别特异性和年龄相关性差异。
平均骨盆倾斜度为-0.1±5.5°。骨盆矢状面旋转未显示出与性别和年龄相关的差异。与男性相比，女性的AA角度更高（相对于APP，20.0°对17.2°，p<0.001）。骨盆前倾与AA呈正相关，与低AA者相比，高AA者的骨盆前倾度更高（相对于APP，p<0.0001）。
为了正确确定髋臼方向，必须考虑骨盆矢状面旋转来计算AA。骨盆倾斜取决于髋臼方向，并补偿增加的AA。
