Pool-Goudzwaard Annelies, Gnat Rafael, Spoor Kees
Department of Neuroscience, Faculty of Medicine and Health Sciences, Erasmus MC University, Rotterdam, The Netherlands.
Man Ther. 2012 Feb;17(1):66-70. doi: 10.1016/j.math.2011.09.002. Epub 2011 Oct 20.
Angular motions of human joints are frequently accompanied by bony deformations. In the case of the pelvis it is unknown how much deformation within the innominate and movement within pelvic joints will occur during an asymmetrical loading. Deeper insight into this topic could help to increase the understanding of the biomechanics of the pelvis during e.g. locomotion and improve interpretation of clinical tests in which manual force is asymmetrically applied to the pelvic bones.
To test the occurrence of deformation within the innominate and movement within the pubic symphysis during asymmetric moment application to the pelvis.
In 15 embalmed specimens an incremental moment was applied to one innominate bone in the sagittal plane with respect to the fixated contralateral innominate. The three-dimensional (3D) deformation within the fixated innominate, as well as displacement of the pubic symphysis, were described during each increment of the moment. Maximal amount of deformation within the fixated innominate was compared with displacement in the pubic symphysis and tested for significant difference for all subjects and separately by gender.
Mean range of 3D deformation of the innominate bone (3.39 ± 2.92 mm) is comparable to the range of symphysis motion (3.20 ± 2.58 mm; p > 0.05). Largest deformation within the innominate was present in the transverse plane (1.41 ± 3.1 mm). Significant differences (p < 0.01) occured in the mobility of the pubic symphysis between male and female specimens. No significant gender differences were present in the deformation of the innominate bone.
During asymmetrical loading both movement within the pubic symphysis as well as deformation within the innominate occur simultaneously. Deformation of the innominate is the largest in the transverse plane.
人体关节的角运动常伴有骨变形。对于骨盆而言，在非对称负荷期间，无名骨内会发生多少变形以及骨盆关节内会出现何种运动尚不清楚。更深入地了解这一主题有助于增进对骨盆在例如运动过程中的生物力学的理解，并改善对那些手动向骨盆骨施加非对称力的临床试验的解读。
测试在向骨盆施加非对称力矩期间无名骨内的变形情况以及耻骨联合处的运动情况。
在15个防腐处理的标本中，相对于固定的对侧无名骨，在矢状面内向一块无名骨施加递增力矩。在力矩每次递增期间，描述固定无名骨内的三维（3D）变形以及耻骨联合的位移。将固定无名骨内的最大变形量与耻骨联合处的位移进行比较，并对所有受试者以及按性别分别进行显著性差异测试。
无名骨的3D变形平均范围（3.39 ± 2.92毫米）与耻骨联合运动范围（3.20 ± 2.58毫米；p > 0.05）相当。无名骨内最大变形出现在横断面（1.41 ± 3.1毫米）。男性和女性标本在耻骨联合活动度方面存在显著差异（p < 0.01）。无名骨变形在性别上无显著差异。
在非对称负荷期间，耻骨联合处的运动以及无名骨内的变形同时发生。无名骨在横断面的变形最大。
