中国组织工程研究 ›› 2016, Vol. 20 ›› Issue (44): 6599-6605.doi: 10.3969/j.issn.2095-4344.2016.44.009

• 数字化骨科 digital orthopedics • 上一篇    下一篇

股骨转子间骨折不同固定方式影响股骨近端应力的有限元分析

姜自伟,黄 枫,郑晓辉,虎群盛,庞智晖,周广全,李 悦   

  1. 广州中医药大学第一附属医院创伤骨科,广东省广州市 510405
  • 修回日期:2016-08-09 出版日期:2016-10-28 发布日期:2016-10-28
  • 作者简介:姜自伟,男,1980年生,山东省临沂市人,2013年广州中医药大学毕业,博士,副主任中医师,主要从事中西医结合治疗骨与关节损伤研究。
  • 基金资助:

    广东省自然科学基金项目(2014A030310379);广州市科技计划一般项目(1563000664)

Different fixations for intertrochanteric fracture affect proximal femur stress: a finite element analysis

Jiang Zi-wei, Huang Feng, Zheng Xiao-hui, Hu Qun-sheng, Pang Zhi-hui, Zhou Guang-quan, Li Yue   

  1. Department of Traumatic Orthopedics, First Affiliated Hospital, Guangzhou University of Chinese Medicine, Guangzhou 510405, Guangdong Province, China
  • Revised:2016-08-09 Online:2016-10-28 Published:2016-10-28
  • About author:Jiang Zi-wei, M.D., Associate chief physician, Department of Traumatic Orthopedics, First Affiliated Hospital, Guangzhou University of Chinese Medicine, Guangzhou 510405, Guangdong Province, China
  • Supported by:

    the Natural Science Foundation of Guangdong Province, No. 2014A030310379; the General Program of Science and Technology Plan of Guangzhou City, No. 1563000664

摘要:

文章快速阅读:

 
 
文题释义:
骨近端防旋髓内钉:该髓内钉是在股骨近端髓内钉的基础上改良设计的新型髓内钉,该钉集中了微创、中心固定、防旋的优点,其同时克服了股骨近端髓内钉多技术上的缺陷。头颈钉的螺旋刀设计,在打入的过程中刀片的宽大表面可以旋转进入,从而尽可能地挤压骨质,在松质骨中具有很好的把持力。
动力髋螺钉:该钉板系统是为治疗股骨转子间骨折依据股骨近端解剖而设计的由股骨近端外侧钢板及头颈螺钉组合成的内固定系统,属于偏心固定装置。骨折固定后随着折端的加压和骨吸收,头颈钉会向后滑动,从而促进骨折接触,减少因应力集中出现的头切割现象。
 
摘要
背景:股骨转子间骨折髓内与髓外固定方式的力学特点一直是有限元研究的热点,但国内对于股骨近端张力及压力侧对比研究较少。课题组研究发现,股骨近端应力带的分布是研究骨折及内固定设计与使用的重要依据。
目的:探讨股骨转子间骨折采用髓内及髓外固定对股骨近端压力侧及张力侧的应力影响。
方法:通过对志愿者股骨CT扫描,Mimics建模,模拟EvansⅠ型股骨转子间骨折,分别采用股骨近端防旋髓内钉及动力髋螺钉固定,模拟双下肢负重时股骨近端的应力状况,运用Abaqus 6.13有限元分析软件进行计算,并对不同固定方式下股骨近端、固定器械压力侧及张力侧的应力进行分析。
结果与结论:①股骨近端防旋髓内钉组压力侧及张力侧的应力均小于动力髋螺钉组,股骨近端防旋髓内钉固定后股骨近端的应力更加趋向于生理状态;②结果提示,股骨转子间骨折髓内固定较髓外固定具有更好的力学优势,髓内固定有利于股骨近端压力侧及张力侧的保护。

中国组织工程研究杂志出版内容重点:人工关节;骨植入物;脊柱骨折;内固定;数字化骨科;组织工程

ORCID:
0000-0001-5277-6757(姜自伟)

关键词: 骨科植入物, 骨植入物, 股骨转子间骨折, 张应力, 压应力, 有限元, 广东省自然科学基金

Abstract:

BACKGROUND: The mechanical characteristics of intramedullary and intramedullary fixations for treating intertrochanteric fracture were hot research of finite element, but there was few comparative research on tension side and pressure side of proximal femur. In our study, we found that the distribution of the stress zone was important indication to researches on intertrochanteric fracture and internal fixation design.

OBJECTIVE: To explore the effects of intramedullary and extramedullary fixations for treating intertrochanteric fracture on pressure side and tensile side of proximal femur.
METHODS: CT scan and Mimics modeling of volunteer’s femur were conducted, and the model Evans type I intertrochanteric fracture was constructed and treated with proximal femoral nail antirotation and dynamic hip screw respectively. The stress condition of proximal femur in weight status was simulated. The Abaqus 6.13 was used for finite element analysis, and the tension side and pressure side of proximal femur in both fixations were also analyzed.
RESULTS AND CONCLUSION: (1) The stresses of compressive side and tensile side in proximal femoral nail antirotation group were both less than that in dynamic hip screw group. The stress of proximal femur in proximal femoral nail antirotation group was more similar to that in physiological status. (2) These findings verified that for treating intertrochanteric fracture, intramedullary fixation exerted better mechanical behavior than extramedullary fixation. The protection of compressive side and tensile side of proximal femur had achieved by intramedullary fixation. 

中国组织工程研究杂志出版内容重点:人工关节;骨植入物;脊柱骨折;内固定;数字化骨科;组织工程

Key words: Femur, Fractures, Bone, Stress, Mechanical, Finite Element Analysis, Tissue Engineering

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