第三腰椎横突综合征三维有限元实验研究

Three-dimensional Finite Element Analysis of Transverse Process Syndrome of Third Lumbar Vertebra

目的研究人体在不同工况时,L3横突末端肌肉、韧带附力处的应力变化及分布规律,探讨L3横突综合征的发病机制与防治办法。方法采用三维有限元法建立力学模型,模拟人体腰部主要活动形式,设计常见13种工况并计算结果。结果①在各种工况下,L3横突末端所受的应力都明显大于邻近的L2、L4横突。弯腰、旋转、侧屈等工况随着角度的加大或载荷的增加,L3横突末端所受的应力也相应增加。②卧床休息时,人体L3横突末端所受的应力最小,站立位次之,弯腰旋转时最大。结论①L3横突末端所受的应力明显大于邻近的L2、L4横突,故极易造成L3横突末端软组织的损伤。弯腰、侧屈、旋转时,L3横突末端的应力明显增加,患者应避免长时间处于上述体位。②卧床休息、腰围保护有利于本病的恢复。

Objective To study the change and distribution rule of stress on the third lumbar transverse process（LTP） extremities where the muscles and ligaments insertio in different conditions of human body,and explore the pathogenesis and treatment of transverse process syndrome of the third lumbar vertebra.Methods The biomechanics models were established with three-dimensional finite element method to simulate the main activity forms of human waist.13 working conditions were designed and the results were analyzed.Results The stress on the extremities of the third LTP was larger significantly than that of the second or the fourth adjacent LTP in all conditions,and the stress increased with the angle or load increase in the conditions such as forward bending,lateriflection,rotation,etc..The stress on the extremities of the third LTP was the smallest in the condition of bed rest,smaller in the condition of standing,and largest in the condition of rotation.Conclusion The stress on the extremities of the third LTP is larger significantly than that of the second or the fourth adjacent LTP,so it is easily to cause soft tissue injury of the third LTP extremities.The stress increases significantly in the conditions such as forward bending,lateriflection and rotation,so patients should avoid in such conditions for a long term,and bed rest and waistline protection are benefit to the recover of this disease.