有限接触式带锁髓内钉的有限元分析及临床应用  

Study on limited contact femoral supracondylar interlocking intramedullary nail by finite element analysis

作　　者：李智[1] 王臻[2] 孙峥[3] 

机构地区：[1]解放军总医院全军骨科研究所,北京100853 [2]第四军医大学西京医院骨科,西安710032 [3]解放军第101医院骨科,无锡214044

出　　处：《中国矫形外科杂志》2006年第14期1082-1085,i0001,共5页Orthopedic Journal of China

摘　　要：[目的]设计、制造一种可与人工表面关节结合的有限接触式股骨髁上型带锁髓内钉,构成人工半膝关节系统,用于提高儿童保肢手术效果。[方法]运用有限元方法对髓内钉锁钉不同置入角度(锁钉与髓内钉横断面的夹角)0°、15°、30°、45°、60°条件下骨、髓内钉及锁钉和整体结构进行应力分析。[结果]有限元分析(FEA)结果显示,锁钉以15°角置入时,骨、髓内钉及锁钉所受最大应力为最小,应力分布也较其它角度均匀。在0°角时,骨的最大应力较15°、30°和45°时大。随着穿钉角度的增大,近端锁钉最大应力增加,远端锁钉最大应力减小。[结论]有限接触式髓内钉减少了对骨原有生物环境的破坏,可与人工表面关节结合运用于异体骨关节移植,有较好的临床应用价值。[ Objective] A new limited contact femoral supracondylar interlocking intramedullary nail （LCFSIIN） was made, which was part of a new custom-made hemi-knee joint, to improve the results of childrens＇ limb salvage. [ Method] A new LCFSIIN was performed and the stress of bolts,intramedullary nails and bone were analyzed by finite dement analysis（FEA） while the bolts were implanted in different angulafions -0°, 15° ,30° ,45° and 60°. [ Result] The results of FEA show that the stress of bolts, bone and nails with 15° insertion angles of bolt was the tiniest and well distributed. Stress of bone with 0° insertion angles was more obvious than that with 15° ,30° and 45°. The more the angles,the stress of proximal bolt became more obvious and the stress of distal bolt decreasing. [ Conclusion]This new LCFSIIN can reduce destruction of biological environment of bone and is easy in use in limb salvage surgery of allograft.

关 键 词：有限接触 髓内钉 有限元分析 

分 类 号：R687.1[医药卫生—骨科学]