中国组织工程研究 ›› 2021, Vol. 25 ›› Issue (9): 1404-1409.doi: 10.3969/j.issn.2095-4344.4014

• 骨科植入物Orthopedic implants • 上一篇    下一篇

钉道强化股骨近端防旋髓内钉治疗老年A3.3型股骨转子间骨折:最佳骨水泥量有限元分析

陈心敏1,李文标1,熊凯凯1,熊晓燕1,郑利钦2,李木生2,郑永泽2,林梓凌3   

  1. 1丰城市中医院,江西省丰城市   331100;2广州中医药大学,广东省广州市   510405;3 广州中医药大学第一附属医院,广东省广州市   510405
  • 收稿日期:2020-04-03 修回日期:2020-04-10 接受日期:2020-05-16 出版日期:2021-03-28 发布日期:2020-12-15
  • 通讯作者: 林梓凌,博士,主任中医师,硕士生导师,广州中医药大学第一附属医院,广东省广州市 510405
  • 作者简介:陈心敏,男,1992年生,江西省赣州市人,2019年广州中医药大学毕业,硕士,医师,主要从事骨与关节损伤的中西医治疗和生物力学研究。
  • 基金资助:
    国家自然科学基金资助项目(81673996)

Type A3.3 femoral intertrochanteric fracture with augmented proximal femoral nail anti-rotation in the elderly: finite element analysis of the optimal amount of bone cement

Chen Xinmin1, Li Wenbiao1, Xiong Kaikai1, Xiong Xiaoyan1, Zheng Liqin2, Li Musheng2, Zheng Yongze2, Lin Ziling3   

  1. 1Fengcheng Hospital of Traditional Chinese Medicine, Fengcheng 331100, Jiangxi Province, China; 2Guangzhou University of Chinese Medicine, Guangzhou 510405, Guangdong Province, China; 3First Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou 510405, Guangdong Province, China
  • Received:2020-04-03 Revised:2020-04-10 Accepted:2020-05-16 Online:2021-03-28 Published:2020-12-15
  • Contact: Lin Ziling, MD, Chief TCM physician, Master’s supervisor, First Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou 510405, Guangdong Province, China
  • About author:Chen Xinmin, Master, Physician, Fengcheng Hospital of Traditional Chinese Medicine, Fengcheng 331100, Jiangxi Province, China
  • Supported by:
    the National Natural Science Foundation of China, No. 81673996

摘要:

文题释义:
钉道强化股骨近端防旋髓内钉:股骨近端防旋髓内钉是治疗不稳定型股骨转子间骨折较为理想的内固定之一,钉道强化即注入骨水泥包裹螺旋刀片近端,增加螺旋刀片把持力和锚固力,降低内固定失败风险。
有限元分析:具有操作简便、仿真度高、可重复利用等优势,从简单的骨骼应力到手术内固定的选择,以及动态骨折的仿真分析均可应用,在骨科领域蓬勃发展。

背景:骨质疏松和骨折类型是影响股骨近端防旋髓内钉内固定后失效的两个重要原因,而钉道强化股骨近端防旋髓内钉治疗老年AO31-A3.3型股骨转子间骨折可以有效降低术后失败率,但注入骨水泥的具体数量仍有待商榷。
目的:探讨钉道强化股骨近端防旋髓内钉治疗老年A3.3型股骨转子间骨折的最佳骨水泥量。 
方法:选取1名志愿者CT资料导入Mimics 19.0和Geomagic studio 2017软件中进行提取、优化得到右侧股骨三维模型;运用Solidworks 2017软件画出内固定模型并与股骨模型按照标准手术技术装配,再导入Hypermesh 14.0软件中截骨得到AO31-3.3型股骨转子间骨折模型,将螺旋刀片近端周围松质骨重新定义为骨水泥,分别得到A(2.2 mL)、B(4.2 mL)、C(6.4 mL)3个不同骨水泥注入量的钉道强化股骨近端防旋髓内钉模型,设置材料属性参数、边界条件、施加载荷,分别导入LS-DYNA软件求解。 
结果与结论:①3个模型头颈骨块内翻和旋转角度、股骨近端整体应力无明显差异,但B、C模型螺旋刀片切割严重且出现螺旋刀片断裂,A模型螺旋刀片切割轻微无断裂;②骨水泥强大的锚固力能稳定螺旋刀片,但容易导致局部应力集中;③钉道强化股骨近端防旋髓内钉治疗老年A3.3型股骨转子间骨折注入的骨水泥量不宜过多,可能不超过3 mL具有最佳的生物力学效果。
https//orcid.org/0000-0002-9519-4797 (陈心敏) 

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: 骨, 股骨, 骨折, 骨水泥, 髓内钉, 有限元分析, 生物力学

Abstract: BACKGROUND: Osteoporosis and fracture type are two important reasons for the postoperative failure of proximal femoral nail anti-rotation. The treatment of elderly patients with type AO31-A3.3 femoral intertrochanteric fractures by bone cement augmented proximal femoral nail anti-rotation can effectively reduce the failure rate, but the specific amount of bone cement injected remains to be discussed. 
OBJECTIVE: To investigate the optimal amount of bone cement in the treatment of type A3.3 intertrochanteric femur fracture with augmented proximal femoral nail anti-rotation in elderly. 
METHODS: CT data of one volunteer were imported into Mimics 19.0 and Geomagic studio 2017 to extract and optimize the three-dimensional model of the right femur. Internal fixation model was drawn and assembled with femur model according to the standard operation technology, then imported into Hypermesh 14.0 software to simulate type AO31-3.3 intertrochanteric femur fracture. The spongy bone around the proximal helical blade was redefined as bone cement, obtaining A, B and C models with 2.2 mL, 4.2 mL, and 6.4 mL of bone cement, respectively. The material property parameters, boundary conditions, and applied loads were set and imported into LS-DYNA software for solution. 
RESULTS AND CONCLUSION: (1) There was no significant difference in the inversion and rotation angles of the head and neck fragment and the overall stress in three models, but the blade cutting in model B and model C was severe and the helical blade was broken, while the blade cutting in model A was slight and did not break. (2) The strong anchoring force of bone cement could stabilize the helical blade, but easily led to local stress concentration. (3) The amount of bone cement injected into the proximal femoral nail anti-rotation for the treatment of type A3.3 intertrochanteric femur fracture in elderly should not be too much, and less than 3 mL may have the best biomechanical effect.  

Key words: bone, femur, fracture, bone cement, intramedullary nail, finite element analysis, biomechanics

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