Dujardin F, Selva O, Mejjad O, Pasero D, Piraux J L, Thomine J M
Travail du Groupe de Recherche sur le Handicap de l'Appareil Locomoteur (GRHAL). Clinique Chirurgicale Orthopedique et Traumatologique, Pavillon Felix Deve, Hopital Charles Nicolle, Rouen, Cedex.
Rev Chir Orthop Reparatrice Appar Mot. 1995;81(7):592-600.
Pelvis motion appears as a main human gait component, it is linked to the lower limb joints and to the spine. Current devices, especially the opto-electronical systems, allow quantitative and tri-dimensional gait studies. The purpose of this study was to quantify the pelvic motion individual variability in a sample of healthy subjects.
The study based on a 18 volunters sample. There were 14 men and 4 women, ranged in age from 25 to 37 years. A clinical examination and a AP radiograph of pelvis allowed to include healthy subjects. We used the three-dimensional analysis VICON system with five cameras. Nine records were performed for each subject during a free-speed walking. These nine records were distributed on three different days.
The step length medianes varied from 1100 to 1600 mm with a significantly (p < 0.05) regression between the step length, the walking speed and the subjects height. Vertical pelvic oscillations varied in this sample from 25 to 60 mm and linked with step length and walking speed. Pelvic rotation around the vertical axis varied from 1.5 to 15 degrees. We did not found regression between this pelvic rotation and the length step. It seems there are three types of pelvic rotation around the vertical axis. At the beginning of the stance phase, in type I, the pelvis is in the transversal plane whereas in the type II, it appears with the maximal rotation. In type III, the value of pelvic rotation is very low. The successive lateral inclinations of pelvic described a complex motion which varied from 1.5 to 9 degrees. The rotation of shoulders around the vertical axis varied from 4 degrees to 13 degrees and the successive inclinations varied from 3.25 degrees to 12 degrees. We did not found any regression between the pelvic and shoulders motion values.
This study showed that the pelvis motion varied considerably from one subject to another. These variations induce different ways of walking with various consequences on the hip joint and the spine. We suppose that these variations could take a part in etiology of some diseases as hip arthritis or in total hip arthroplasty failure, especially in cup wearing.
骨盆运动是人类步态的主要组成部分，它与下肢关节和脊柱相关。当前的设备，尤其是光电系统，可用于定量和三维步态研究。本研究的目的是量化健康受试者样本中骨盆运动的个体变异性。
该研究基于18名志愿者样本。其中有14名男性和4名女性，年龄在25至37岁之间。通过临床检查和骨盆前后位X线片纳入健康受试者。我们使用配备五个摄像头的三维分析VICON系统。每位受试者在自由速度行走期间进行了9次记录。这9次记录分布在三个不同的日子。
步长中位数在1100至1600毫米之间变化，步长、步行速度与受试者身高之间存在显著（p < 0.05）的回归关系。该样本中骨盆垂直振荡在25至60毫米之间变化，并与步长和步行速度相关。骨盆绕垂直轴的旋转在1.5至15度之间变化。我们未发现该骨盆旋转与步长之间的回归关系。似乎存在三种骨盆绕垂直轴的旋转类型。在站立期开始时，I型中骨盆处于横向平面，而II型中骨盆出现最大旋转。在III型中，骨盆旋转值非常低。骨盆连续的侧倾描述了一种复杂的运动，其变化范围为1.5至9度。肩部绕垂直轴的旋转在4度至13度之间变化，连续的倾斜在3.25度至12度之间变化。我们未发现骨盆和肩部运动值之间的任何回归关系。
本研究表明，不同受试者之间骨盆运动差异很大。这些差异导致不同的行走方式，对髋关节和脊柱产生各种影响。我们推测这些差异可能在某些疾病如髋关节炎的病因或全髋关节置换失败中起作用，尤其是在髋臼磨损方面。
