膨胀锁定髓内钉治疗股骨骨折的生物力学评价
A biomechanical evaluation of intramedullary expansive locking nail in treatment of femoral fractures
穆尚强 1张磊 2刘建敏 1黄哲元 1卫磊 1袁志1
作者信息
- 1. 第四军医大学西京医院骨科研究所,陕西,西安,710033
- 2. 解放军118医院骨科,浙江,温州,325000
- 折叠
摘要
目的:对一种新型无需传统锁钉的膨胀锁定髓内钉进行生物力学性能测试和评价. 方法:将6对新鲜股骨标本均分为2组,造成股骨中段横行骨折,分别用膨胀锁定髓内钉和国产传统交锁髓内钉内固定,并使断端间保留1.5 cm的裂隙.分别对其进行轴向压缩载荷、水平扭转及三点弯曲等生物力学测试,用SPSS13.0统计软件进行统计分析. 结果:膨胀锁定髓内钉的抗短缩刚度、抗旋转刚度及抗弯曲刚度略小于交锁髓内钉,但无显著性差异. 结论:膨胀锁定髓内钉具有较强抗压、抗弯、抗旋转性能,符合生物学固定的要求,有较好的临床推广应用前景.
Abstract
AIM: To test and evaluate the biomechanical functions of intramedullary expansive locking nail (IELN), a new kind of internal fixation without the orthodox lockpin. METHODS: Six pairs of fresh adult cadaveric femur specimens were divided into 2 groups: IELM group and interlocking nail group. A fracture was made at 1/2 shaft in each femur and then a 1.5 cm bone gap was kept respectively by IELN or homemade interlocking nail. A biomechanical test was conducted in each specimen on axial displacement, rotation resistance and bending, and the data were analyzed by SPSS13.0. RESULTS: The stiffness of rotation resistance, axial displacement and bending resistance in IELN group were smaller than those in interlocking group, but no statistical difference was observed between the 2 groups. CONCLUSION: IELN has better functional resistance to rotation, axial displacement and bending, and is worth wide clinical application.
关键词
股骨骨折/骨折固定术/髓内钉/生物力学Key words
femoral fractures/fracture fixation/intramedullary nail/biomechanics引用本文复制引用
基金项目
陕两省攻关课题面上项目(2005K11-G4)
出版年
2009
NETL
NSTL
维普
万方数据