小转子未固定的PFNA治疗Evans-Jensen Ⅲ型转子间骨折的有限元分析  

Finite Element Analysis of PFNA Treated Evans-Jensen Ⅲ Type Intertrochanteric Fracture with Unfixed Femur Lesser Trochanter

作　　者：张雪鹏[1] 杨金锁[2] 

机构地区：[1]南阳理工学院张仲景国医学院,南阳473004 [2]南阳医学高等专科学校,南阳473061

出　　处：《科学技术与工程》2016年第15期144-148,共5页Science Technology and Engineering

基　　金：河南省科技厅科技攻关项目(142102310107)资助

摘　　要：建立小转子未固定的Evans-JensenⅢ型转子间骨折的PFNA内固定有限元模型,分析股骨转子区域在负重后及模拟髋内翻发生过程的应力变化。建立小转子不固定及固定的Evans-JensenⅢ型转子间骨折PFNA内固定的三维有限元模型,分析股骨转子间骨折块的生物力学应力环境。无论小转子是否固定,Evans-JensenⅢ型转子间骨折使用PFNA内固定后Von Mises应力分布均匀,股骨转子间骨折块稳定性良好,但固定小转子后的PFNA内固定其应力分布的最大Von Mises应力值更大。PFNA内固定能有效维持小转子未固定的Evans-JensenⅢ型转子间骨折的稳定性,有限元分析结果能够为临床实践提供术前依据。To construct the finite element model of Evans-Jensen Ⅲ type intertrochanteric fracture treated by PFNA when the femur lesser trochanter is unfixed. the Von Mises stress changes as load the weight and hip varus on the femur. The Finite element models of Evans-Jensen Ⅲ type intertrochanteric fracture treated by PFNA with fixed unfixed femur lesser trochanter were established to analysis the biomechanical environment of the intertrochanteric fracture. The Evans-Jensen Ⅲ type intertrochanteric fracture possess a uniform Von Mises stress and excellent stability after treated with PFNA fixation. However,the Von Mises stress was larger as the lesser trochanter was fixed compared with the unfixed lesser trochanter. The PFNA treatment could maintain the stability of the Evans-Jensen Ⅲ type intertrochanteric fracture with unfixed femur lesser trochanter.

关 键 词：股骨转子间骨折 小转子 PFNA 有限元 

分 类 号：R683[医药卫生—骨科学]