三种内固定器械对胸腰段脊柱骨折固定的力学特点及对比研究  

MECHANICAL EVALUATION OF SPINAL FIXATION STABILITY PROVIDED BY THREE INTERNAL FIXATION DE- VICES FOR THROACOLUMBAR SPINE FRACTURES

作　　者：谭映军[1] 潘显明[1] 权毅[1] 陈乾一[1] 李延[1] 郑琇山[1] 应大君[2] 

机构地区：[1]成都军区成都总医院,成都610083 [2]第三军医大学解剖教研室

出　　处：《解放军医学杂志》2002年第10期897-899,共3页Medical Journal of Chinese People's Liberation Army

摘　　要：通过三种内固定器械的力学对比研究,为临床的应用提供可靠依据。选取新鲜尸体胸腰段脊柱骨折模型,采用拉丁方设计,分别用三种内固定器械固定,观察不同负荷下位移及角度的变化。结果发现,单纯椎体压缩骨折模型中三种内固定方式的力学特征基本相似;伴有三柱损伤的椎体压缩骨折模型中,在轴向扭矩负荷下,ARRIF钉和AF钉明显优于DICK钉。在上述负荷下,钉道周围的骨小梁未见损伤。ARRIF钉的力学特点与AF钉、DICK钉基本相似,但其设计特点保证了其优异的抗旋转能力及在使用过程中安装简便,因此在临床上有一定的价值。By mechanical comparison study of ARRIF,Dick and AF ,their reliable basis for further clinical application was evaluated. Models of spinal fracture were made using fresh cadavers. According to the Latin squre experimental designing principle, the fracture specimens were fixed with ARRIF,Dick and AF separately. The shift and angle changes were observed under different loads,and the analysis of variance was performed to all the data with the SPSS software . The single spinal compression fracture model showed no significant shift and the mechanical features were similar when it was fixed by ARRIF,Dick and AF. The model of spinal compression fracture with three spinal damages showed significant differences among these three fixings when axial torsion load was given. ARRIF and AF were clearly superior to Dick. The histological observation of ARRIF recorded no significant changes in the bone trabecula around the nail pass and the structure kept normal. The mechanical feature of ARRIF was basically similar to that of AF and Dick. Our conclusion is that because of the characteristics of its designing, the anti-axial torsion ability of ARRIF is outstanding and it can be easily fixed in application, thus it holds certain value in clinical practice.

关 键 词：力学 内固定器 脊柱骨折 

分 类 号：R683.2[医药卫生—骨科学] R608[医药卫生—外科学]