中国组织工程研究 ›› 2021, Vol. 25 ›› Issue (27): 4271-4276.doi: 10.12307/2021.181

• 骨与关节生物力学 bone and joint biomechanics • 上一篇    下一篇

解剖髓内钉ZNN、髓内钉Gamma 3和联合加压交锁髓内钉InterTan置入内固定治疗老年反转子间骨折的生物力学特点

陈  健,马剑雄,卢  斌,柏豪豪,王  颖,马信龙   

  1. 1宣城市人民医院骨科,安徽省宣城市   242000;2天津市骨科研究所、天津市天津医院,天津市   300050
  • 收稿日期:2020-10-31 修回日期:2020-11-03 接受日期:2020-12-14 出版日期:2021-09-28 发布日期:2021-04-10
  • 通讯作者: 马信龙,教授,博士生导师,天津市骨科研究所、天津市天津医院,天津市 300050
  • 作者简介:陈健,男,1982年生,安徽省宣城市人,汉族,天津医科大学在读博士,副主任医师,主要从事创伤、生物力学、数字骨科、3D打印方面的研究。
  • 基金资助:
    国家自然科学基金(81871777),项目负责人:马信龙;国家自然科学基金(11772226),项目负责人:马剑雄;天津市科技计划项目(18PTLCSY00070,16ZXZNGX00130),项目负责人:马信龙;中国博士后科学基金面上资助(2017M621087),项目负责人:马剑雄;天津市博士后创新项目择优资助项目(TJQYBSH2017017),项目负责人:马剑雄

Biomechanical properties of reverse obliquity intertrochanteric fracture in the elderly treated with three different intramedullary fixations of ZNN nail, Gamma 3 nail and InterTan nail

Chen Jian, Ma Jianxiong, Lu Bin, Bai Haohao, Wang Ying, Ma Xinlong   

  1. 1Department of Orthopedics, People’s Hospital of Xuancheng City, Xuancheng 242000, Anhui Province, China; 2Department of Orthopedics Research, Tianjin Hospital, Tianjin 300050, China
  • Received:2020-10-31 Revised:2020-11-03 Accepted:2020-12-14 Online:2021-09-28 Published:2021-04-10
  • Contact: Ma Xinlong, Professor, Doctoral supervisor, Department of Orthopedics Research, Tianjin Hospital, Tianjin 300050, China
  • About author:Chen Jian, Doctoral candidate, Associate chief physician, Department of Orthopedics, People’s Hospital of Xuancheng City, Xuancheng 242000, Anhui Province, China
  • Supported by:
    the National Natural Science Foundation of China, No. 81871777 (to MXL), No. 11772226 (to MJX); the Science and Technology Program of Tianjin, No. 18PTLCSY00070, 16ZXZNGX00130 (to MXL); the General Financial Grant from the China Postdoctoral Science Foundation, No. 2017M621087 (to MJX); Grants from Postdoctoral Innovation Project of Tianjin, No. TJQYBSH2017017 (to MJX)

摘要:

文题释义:
解剖型髓内钉ZNN:由捷迈公司生产,由主钉、拉力螺钉和远端锁钉构成,主钉近端直径为15.5 mm,4°外偏角,15°前倾角,提供125°和130°两种颈干角,短钉带前弓弧度,曲率半径为1 275 mm,长度为180 mm,直径为10 mm。
髓内钉Gamma 3:史赛克公司生产,由主钉、拉力螺钉和远端锁钉构成,主钉近端直径为15.5 mm,4°外偏角,颈干角为130°,短钉(170 mm)无前弓弧度。
联合加压交锁髓内钉InterTan:施乐辉公司生产的联合加压交锁髓内钉,联合交锁钉由拉力螺钉和加压螺钉构成,适用于各种类型的股骨骨折,拉力螺钉的直径为11 mm,加压螺钉的直径为7 mm,交锁后直径为15.25 mm,短钉(180 mm,200 mm)无前弓弧度。

背景:髓内钉Gamma 3和联合加压交锁髓内钉InterTan与髓内钉ZNN置入内固定治疗转子间骨折均具有良好的临床效果,但3种内植物的力学稳定性差异尚不清楚。
目的:探讨解剖型髓内钉ZNN、髓内钉Gamma 3和联合加压交锁髓内钉InterTan治疗老年反转子间骨折的生物力学性能。
方法:采用三维有限元法分别建立ZNN、Gamma 3和InterTan固定反转子间骨折(AO分型31-A3.1型)模型,比较3组模型内植物与股骨的
Von Mises应力分布、应力峰值及位置,以及模型的位移分布、最大位移量与位置和骨折断端最大裂缝距离。
结果与结论:①在ZNN、Gamma 3和InterTan模型中内植物的应力峰值分别为364.8,364.9,97.01 MPa,InterTan内固定模型最低;②ZNN、Gamma 3和InterTan内固定模型的股骨应力均集中在远端锁定螺钉钉孔处,应力峰值分别为171.8,824.8,29.51 MPa,Gamma 3内固定模型的股骨承受应力最高;③ZNN、Gamma 3和InterTan内固定模型的最大位移量分别为3.768,3.862,3.542 mm,均位于股骨头顶部;ZNN、Gamma 3和InterTan内固定模型的骨折断端最大裂缝距离分别为0.08,0.09,0.02 mm;InterTan内固定模型的最大位移量和骨折断端最大裂缝距离明显小于ZNN、Gamma 3内固定模型;④结果表明,对于反转子间骨折,通过有限元分析发现InterTan内固定对髋内翻塌陷具有明显的抵抗作用,力学性能最好,其次为ZNN内固定,最后为Gamma 3内固定。
https://orcid.org/0000-0001-6734-8501 (陈健) 

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

关键词: 植入物, 内固定, 有限元分析, 反转子间骨折, 骨折固定术, 髓内钉

Abstract: BACKGROUND: Intramedullary nail Gamma 3, compression interlocking intramedullary nail InterTan and intramedullary nail ZNN have good clinical effect in the treatment of intertrochanteric fractures, but the difference of mechanical stability of three kinds of implants is not clear.  
OBJECTIVE: To perform biomechanical properties of anatomical intramedullary nail ZNN, intramedullary nail Gamma 3 and compression interlocking intramedullary nail InterTan for elderly reverse obliquity intertrochanteric fractures.
METHODS:  Three-dimensional finite element analysis was carried out to unstable intertrochanteric fractures models (AO31-A3.1) which fixed with ZNN, Gamma 3 and InterTan. The observed indicators were the distribution, maximum value and position of the Von Mises stress and the displacement, maximum value and position and the maximum crack distances of the fracture surface of the model.  
RESULTS AND CONCLUSION: (1) The peak values of stresses of the implant in the three groups were 364.8 MPa (ZNN), 364.9 MPa (Gamma 3) and 97.01 MPa (InterTan); the stress was lowest in the model InterTan. (2) The peak values of stresses of the femur of the three groups were 171.8 MPa (ZNN), 824.8 MPa (Gamma 3) and 29.51 MPa (InterTan); the stress was highest in the model Gamma 3. (3) The maximum amount of displacement was 3.768 mm in model ZNN, 3.862 mm in model Gamma 3 and 3.542 mm in model InterTan. Their locations were the same which located in the femoral head vertex. The maximum crack distances of the fracture surface of models were 0.08 mm, 0.09 mm and 0.02 mm in ZNN, Gamma 3 and InterTan, respectively. The maximum amount of displacement and the maximum crack distances were obviously smaller in model InterTan than in models ZNN and Gamma 3. (4) For reverse obliquity intertrochanteric fractures, finite element analysis showed that the InterTan implant provided significantly resistance to femoral head varus collapse, with the best mechanical properties, followed by ZNN internal fixation, and finally Gamma 3 internal fixation.

Key words: implant, internal fixation, finite element analysis, reverse obliquity intertrochanteric fracture, fracture fixation, intramedullary nail

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