摘要
目的对正常膝关节进行静态加载在体稳定性研究。方法对8例志愿者,由加载架上对膝关节在屈曲0°、30°、60°和90°时分别进行134 N前、后加载。采集各角度相互垂直的2D图像,与CT(3D)图像在虚拟X线投射系统进行2D/3D图像配准,还原膝关节不同角度时的股骨和胫骨相对3D位置关系,获得膝关节静态加载在体稳定性数据并进行统计学分析。结果随屈曲角度的增大,胫骨前移和前交叉韧带(ACL)长度的增加在30°时最大,胫骨后移和后交叉韧带(PCL)长度增加在0°最大,各角度间均有统计学差异(P<0.05);内外侧副韧带各角度间及前后加载间均无统计学差异。结论通过2D/3D图像配准技术可以实现对膝关节静态加载的在体稳定性分析,并获得不同角度各静态加载在体稳定性参数。
Objective To study the in vivo stability of normal knee under 134 N pre/post loading by the method of 2D/3D registration technique. Methods Eight healthy volunteers were captured CT （3D） images and 2 orthogonal images of the knee at 0° 30°, 60°, and 90° under 134 N Pre/Post loading. 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 tibial translation and ligament length data of the knee could be obtained and analyzed. Re- suits With the flexion angle increased, the length of the ACL increasing and anterior tibial translation got maximum at 30°, the length of the increasing PCL and posterior tibial translation got maximum at 0° there were significant differences between each angle （P 〈0.05）, but there were no significant differences between different angle and pre/post loading according MCL and LCL. Conclusion The in vivo parameters of the normal knee under 134 N pre/post loading can be obtained by the method of 2D/3D registration technique.
出处
《中国骨与关节损伤杂志》
2011年第10期890-893,共4页
Chinese Journal of Bone and Joint Injury
基金
国家自然科学基金(30600302)
