中国组织工程研究 ›› 2016, Vol. 20 ›› Issue (48): 7219-7224.doi: 10.3969/j.issn.2095-4344.2016.48.011

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

三角股骨近端髓内钉固定不稳定型股骨转子间骨折的有限元分析

虎群盛1,姜自伟2,黄 枫2   

  1. 1广州中医药大学第一临床医学院,广东省广州市 510405;2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:2016-10-14 出版日期:2016-11-25 发布日期:2016-11-25
  • 通讯作者: 姜自伟,博士,副主任中医师,广州中医药大学第一附属医院创伤骨科,广东省广州市 510405
  • 作者简介:虎群盛,男,1983年生,河南省信阳市人,广州中医药大学第一临床医学院2014级博士研究生,主治中医师,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(201510010005);国家中医药管理局2013 年全国名老中医药专家传承工作室建设项目-陈基长全国名老中医药专家传承工作室

Finite element analysis of unstable intertrochanteric fracture fixed with triangle proximal femoral nail

Hu Qun-sheng1, Jiang Zi-wei2, Huang Feng2   

  1. 1the First Clinical Medical School, Guangzhou University of Chinese Medicine, Guangzhou 510405, Guangdong Province, China; 2Department of Traumatic Bone, First Affiliated Hospital, Guangzhou University of Chinese Medicine, Guangzhou 510405, Guangdong Province, China
  • Revised:2016-10-14 Online:2016-11-25 Published:2016-11-25
  • Contact: Jiang Zi-wei, M.D., Associate chief physician, Department of Traumatic Bone, First Affiliated Hospital, Guangzhou University of Chinese Medicine, Guangzhou 510405, Guangdong Province, China
  • About author:Hu Qun-sheng, Studying for doctorate, Attending physician, the First Clinical Medical School, Guangzhou University of Chinese Medicine, Guangzhou 510405, Guangdong Province, China
  • Supported by:

    the Natural Science Foundation of Guangdong Province, No. 2014A030310379; the General Project of the Guangzhou Science and Technology Plan, No. 201510010005; the Construction Project of the National Famous Chinese Medicine Expert Inherence Studio of the State Administration of Traditional Chinese Medicine in 2013-Chen Ji-chang National Famous Chinese Medicine Expert Inherence Studio.

摘要:

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文题释义
三角股骨近端髓内钉:已获国家发明专利(授权公告号:CN203763217U),它是以辛迪斯公司的PFNA-Ⅱ为基础加以设计改进,由主钉、6.5 mm直径上端抗张力螺钉、10.5 mm直径螺旋刀片、4.9 mm直径远端锁定螺钉组成。距离螺旋刀片孔上缘1.6 cm处做一直径6.5 mm抗张力螺钉孔,螺钉孔的纵轴与主钉近端纵轴呈110°。其余参数与 PFNA-Ⅱ相同。
内固定应力分布:是衡量内固定方式优劣的一个标准,理想的内固定物应该使应力尽可能均匀的分布在内固定物上,而不应过度集中在某一部位。
 
摘要
背景:以防旋型股骨近端髓内钉以及亚洲型防旋型股骨近端髓内钉(PFNA-Ⅱ)为代表的新型髓内钉治疗是目前股骨转子间骨折中最常用的内固定方式,但仍然无法避免应力集中、内固定失败的风险。
目的:通过有限元方法对新研制的三角股骨近端髓内钉固定不稳定型股骨转子间骨折后的生物力学性能进行分析,并与PFNA-Ⅱ进行对比,检验其设计的合理性。
方法:利用股骨CT数据建立股骨近端的三维有限元模型,在此基础上制作Evans Ⅳ型股骨转子间骨折的三维有限元模型,对骨折模型分别使用三角股骨近端髓内钉和PFNA-Ⅱ固定。比较2种髓内钉内固定后在同一载荷下的内固定应力分布和生物力学稳定性。
结果与结论:①三角股骨近端髓内钉和PFNA-Ⅱ固定模型的应力集中均位于螺旋刀片与主钉交界部位;②PFNA-Ⅱ的最大应力为214.0 MPa,三角股骨近端髓内钉最大应力为196.2 MPa;PFNA-Ⅱ固定的股骨近端位移明显大于三角股骨近端髓内钉,分别为5.37 mm和5.18 mm;③结果提示,三角股骨近端髓内钉固定Evans Ⅳ型股骨转子间骨折比PFNA-Ⅱ具有优势,固定强度更好,不容易出现内固定断裂,符合股骨转子间骨折治疗的要求。

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, 数字化骨科, 股骨转子间骨折, 亚洲型股骨近端防旋髓内钉, 有限元分析, 生物力学, 广东省自然科学基金

Abstract:

BACKGROUND: Proximal femoral nail antirotation (PFNA) and Asian PFNA (PFNA-II) are the most common internal fixation methods in the treatment of intertrochanteric fractures. But stress concentration and failure of internal fixation are still inevitable.

OBJECTIVE: To analyze the biomechanical behaviors of the unstable intertrochanteric fracture fixed with the new designed triangle proximal femoral nail and to testify its feasibility by compared with PFNA-II.
METHODS: Three-dimensional finite element model of proximal femur was established by using CT data of femur. Then the Evans IV femoral intertrochanteric fracture was established, followed by fixed with triangle proximal femoral nail and PFNA-II, respectively. The stress distribution and biomechanical stability under the same load were compared between two nails. 
RESULTS AND CONCLUSION: (1) The stress concentration of the two nails was both located at the junction of the screw blade and the main nail. (2) The maximum stress of PFNA-II and proximal femoral nail was 214 and 196.2 MPa, respectively. The displacement of PFNA-II model was significantly larger than that of the triangular proximal femoral nail (5.37 mm versus 5.18 mm). (3) To conclude, for Evans IV intertrochanteric fracture, the triangle proximal femoral nail is superiority to PFNA-II, showing the good fixation stability and low incidence of internal fixation failure, which all meet the treatment standards.

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: Femoral fractures, Finite Element Analysis, Biomechanics, Tissue Engineering

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