髓内扩张自锁钉的结构特点及力学行为  

The Structural Characteristics and Mechanical Behaviors of the Intramedullary Expand Self-Locking Nail

作　　者：李健民[1] 胥少汀[1] 邹德威 刘树清[1] 李铁防 华筑信 姜金卫[1] 

机构地区：[1]北京军区总医院骨科,100700 [2]国防科委总医院骨科 [3]北京安贞医院骨科 [4]河北大学教务处

出　　处：《中华骨科杂志》1998年第12期728-732,共5页Chinese Journal of Orthopaedics

摘　　要：为克服组合式防旋髓内钉(CAIN)的缺陷,设计出一种新型、实心、细直径的髓内钉。包括动、静态两种类型,命名为髓内扩张自锁钉(IESN)。生物力学试验表明,该钉与Russell-Taylor钉的抗扭及抗弯刚度相近,其静态有很强的抗短缩能力。对实验结果进行了力学分析。其主要优点是:(1)不需扩髓,术中不需X线定位;(2)抗疲劳极限高;(3)无明显应力集中等。文章最后对髓内钉设计的生物力学问题进行了讨论。The intramedullary expand self-locking nail(IESN) is a new type of solid small diameter nail consisting of the dynamic and the static types, designed on the basis of the CAIN. The mechanical experiments showed that its stiffness to resist the bending and twisting momentum was simillar to the Russell -Taylor's nail. The static nail was stable enough to prevent axial displacements of the fractured segments. The main characteristics of the IESN are as follows: 1) It is being able to be inserted without reaming the medullary cavity and without X- ray guidance; 2) a higher limit value to resist fatique and 3) no stress concentration on IESN.

关 键 词：股骨骨折 骨折固定术 髓内 生物力学 

分 类 号：R683.420.5[医药卫生—骨科学] R687.33[医药卫生—外科学]