Kaneda器械对不同程度胸腰段损伤稳定性实验研究  

Biomechanical Stability Analysis of Kaneda Anterior Device in Treating Thoracolumbar Injuries of Different Degree

作　　者：董健[1,2] 陈中伟[1,2] 陈统一[1,2] 洪水棕[1,2] 

机构地区：[1]上海医科大学中山医院骨科 [2]上海交通大学力学系生物力学研究室

出　　处：《上海医科大学学报》1999年第2期83-86,共4页Journal of Fudan University(Medical Science)

摘　　要：目的比较Ｋａｎｅｄａ器械对不同程度胸腰段脊柱损伤提供的生物力学稳定能力及前纵韧带在Ｋａｎｅｄａ器械中的作用。方法采用５例胸腰段脊柱制备脊柱损伤标本，用传感器及电测技术，计算轴压、前屈、后伸、侧弯、旋转５种运动方式的平均顺应系数（ｆ）。结果前中柱损伤Ｋａｎｅｄａ器械固定后，５种运动方式的ｆ皆高于完整脊柱水平（Ｐ＜０．０５）。前纵韧带断裂后，损伤脊柱的轴压、前屈、后伸的ｆ较前下降（Ｐ＜０．０５）。三柱损伤时，前屈运动明显失稳，后伸、侧弯、旋转的ｆ也较前下降（Ｐ＜０．０５）。结论Ｋａｎｅｄａ器械能够给前中柱损伤脊柱提供优于完整脊柱的力学稳定性；保留前纵韧带有利于提高Ｋａｎｅｄａ器械的力学效益；Ｋａｎｅｄａ器械难以维持三柱损伤脊柱的稳定性。Purpose To study the threedimensional stability of the spine injuries of different degree treated by the Kaneda anterior device. Methods Five intact cadaveric thoracolumbar specimens were used.They were measured by 3degree of freedom electrogniometer force and displacement transducers for the relative rotation and horizontal translation between T 11 and L 1 vertebra in the bending direction.The mean flexibility (f) was computed. Results In the damaged anterior and middle column of the spine, Kaneda could provide good stability in compressive loading,flexion,extension,lateral bending and rotation( P <0.05).Cutting the anterior longitudinal ligament could significantly decline the mechanical stability of compressive loading,flexion,and extension of the damaged spine ( P <0.05).In the damaged three columns of the spine,flexion was more unstable and the f in extension,lateral bending and rotation were declined( P <0.05). Conclusions The Kaneda anterior device can increase the mechanical stability of the spine with the damaged anterior and middle column. The intact anterior longitudinal ligament is important for mechanical efficiency of Kaneda.Kaneda shows poor efficiency in the damaged three columns of spine.

关 键 词：生物力学 脊柱稳定性 胸腰段损伤 KANEDA器械 

分 类 号：R683.205[医药卫生—骨科学] R318.01[医药卫生—外科学]