Takayama A
Department of Orthopaedic Surgery, Nippon Medical School, Japan.
Nihon Ika Daigaku Zasshi. 1990 Oct;57(5):476-85. doi: 10.1272/jnms1923.57.476.
Biomechanical experiments were performed on sacroiliac joints of the cadaver pelvis in three different positions to determine changes in stress pattern. The infrared stress analyzing method was used. In the neutral position, principal stress was observed in the middle to upper part of the sacrum, adjacent to the sacroiliac joints, in the central area of the ilium, and in the acetabular region. In the anterior tilting position, the stress on the sacroiliac joints was smaller than in the posterior tilting position, while it was greater in the symphysis pubis area. Further experiments with dial gauges were performed to measure load-displacement value in four cadaver pelves. Vertical loads of up to 100 kg were applied to the fourth lumbar vertebra. At the maximum test loads, displacement of the anterior surface of the first sacral vertebra ranged from 0.18 mm to 0.73 mm in the anterior direction. In conclusion, it is clear that the range of movement in the sacroiliac joints is very small and that this joint plays a significant role in the maintenance of stability in the pelvic girdle.
对尸体骨盆的骶髂关节在三种不同位置进行生物力学实验，以确定应力模式的变化。采用红外应力分析方法。在中立位时，在骶骨中上部、毗邻骶髂关节处、髂骨中央区域以及髋臼区域观察到主应力。在前倾位时，骶髂关节上的应力小于后倾位，而耻骨联合区域的应力更大。对四个尸体骨盆进一步使用百分表进行实验，以测量载荷-位移值。对第四腰椎施加高达100千克的垂直载荷。在最大测试载荷下，第一骶椎前表面的位移在向前方向上为0.18毫米至0.73毫米。总之，很明显骶髂关节的活动范围非常小，并且该关节在维持骨盆带稳定性方面起着重要作用。
