摘要
目的对前交叉韧带(ACL)损伤膝关节进行6个自由度变化的运动还原在体稳定性研究。方法对8例患者的健、患膝关节在生理负重屈曲状态下采集0°、15°、30°、60°和90°时的相互垂直的2D图像,将二维动态的X线影像转化为三维模型的仿真运动,模拟人体膝关节在生理负重情况下骨性结构的变化,准确模拟膝关节的生理运动,并通过健膝和ACL损伤膝关节的对比,研究ACL损伤后膝关节6个自由度的参数变化。结果 ACL损伤膝关节在0～30°范围胫骨有轻度的内旋,和其他角度的差异有统计学意义;在0～90°间胫骨均有轻度的内移,各角度间的差异均无统计学意义;在0°和15°时,胫骨前移分别为(3.61±1.56)mm及(2.12±0.89)mm,而在30～90°范围内无明显胫骨前移增加,与0°及15°的差异均有统计学意义。结论在体稳定性研究可以实行对膝关节的生理运动6个自由度运动参数测量,ACL损伤后膝关节的生理负重运动有显著的6个自由度运动变化。
Objective To measure the 6 degrees of freedom knee kinematics of patients with anterior cruciate ligament deficiency. Methods Eight volunteers with unilateral ACL rupture and contralateral normal knee, was captured CT （3D） images and 2 orthogonal images of the knee at 0, 15,30,60, and 90 degrees of weight-bearing flexion. These orthogonal images were used to recreate the in vivo knee positions at each of the targeted flexion angles by the method of 2D/3D registration, The motion data of the mirror imaging uninjured knee and the injured knee were compared to get the kinematic difference of the intact and ACL deficient knee. Results The ACL injury knee has internal tibial rotation at 0, 15 and 30 degrees and had significant differences with 60 and 90 degrees. The ACL injury knee had internal tibial shift from 0 to 90 degrees, without significant differences between different angle; The ACL injury knee also had （3.61±1.56） mm tibia antelocation at 0 degree and （2.12 ± 0.89） mm tibia antelocation,at 15 degrees, had significant differences with 30, 60 and 90 degrees, which had no obvious tibia antelocation. Conclusion The in vivo 6 degrees of freedom knee kinematics of anterior cruciate ligament deficiency knee can be measured by the method of 2D/3D registration technique.
出处
《中国骨与关节损伤杂志》
2010年第6期502-504,共3页
Chinese Journal of Bone and Joint Injury
基金
国家自然科学基金(30600302)
