不同体位骶髂关节周围韧带应力分布的三维有限元研究

目的　研究在不同体位骶髂关节周围韧带的应力分布与作用。方法　建立骶髂关节与骨盆的三维有限元模型 ,模拟单腿站立位、双腿站立位和坐位等三种工况 ,计算关节周围韧带的应力分布。结果　坐位、双腿站立位和单腿站立位三者中 ,以单腿站立位时骶髂关节周围韧带的应力值为大 ,坐位时骶髂关节周围韧带应力最小 ,提示坐位有利于骶髂关节的休息 ,而单腿站立位易造成骶髂关节的疲劳。结论　本研究结果提示骶髂关节周围的韧带通过提高张力水平 ,在维持关节的不同体位、阻止脱位的趋势方面具有重要意义

Stress Distribution in the Sacroiliac Joint Ligaments in Different Stance with Three Dimensions Finite Flements Analysis

Objective To analysis the stress distribution and physics in the sacroiliac joint ligaments in different stance with three dimensions finite elemental model.Methods Three dimensions finite elemental modal is set up with scanning the pelvic and computer.Imitation of stances of one or two leg standing or sitting are made on the model.Assisted with computer,the stress distribution in the sacroiliac joint ligaments in different stance are calculated and analyzed.Results Among the three stances,the stress in the sacroiliac joint ligaments of one leg standing stance is the biggest,that of sitting stance is the smallest.It means that sitting stance is benefit for the sacroiliac joint to have a rest while the single leg standing stance tends to make the joints strain.Conclusion This analysis concludes that the ligaments of the sacroiliac joint play important roles in maintaining the joint in definite stance and avoiding dislocation through adjust their stress.