中国组织工程研究 ›› 2018, Vol. 22 ›› Issue (7): 1096-1101.doi: 10.3969/j.issn.2095-4344.0123

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

自制股骨头内撑器治疗早期股骨头坏死的有限元分析

杨立峰1,肖东民2,彭春雷3,李康华4,杨斌辉1,刘丰虎1,卫永鲲1,张 波1,李伍建1,郑劲喆1,王伟刚1   

  1. 1西安交通大学附属3201医院骨科,陕西省汉中市 723000;2永州市卫生局,湖南省永州市 425000;3陕西理工大学,陕西省汉中市 723000;4中南大学湘雅医院,湖南省长沙市 410008
  • 出版日期:2018-03-08 发布日期:2018-03-08
  • 作者简介:杨立峰,1977年生,南华大学毕业,硕士,主治医师,主要从事关节外科方面的研究。
  • 基金资助:

    国家高技术研究发展计划(863计划)(2011AA030101),课题名称:钛合金人工关节及创伤类材料关键技术及产品研发

Finite element analysis for self-made femoral head brace device in the treatment of early femoral head necrosis

Yang Li-feng1, Xiao Dong-min2, Peng Chun-lei3, Li Kang-hua4, Yang Bin-hui1, Liu Feng-hu1, Wei Yong-kun1, Zhang Bo1, Li Wu-jian1, Zheng Jin-zhe1, Wang Wei-gang1   

  1. 1Department of Orthopedics, Affiliated 3201 Hospital, Xi’an Jiaotong University, Hanzhong 723000, Shaanxi Province, China; 2Yongzhou Municipal Health Bureau, Yongzhou 425000, Hunan Province, China; 3Shaanxi University of Technology, Hanzhong 723000, Shaanxi Province, China; 4Xiangya Hospital, Central South University, Changsha 410008, Hunan Province, China
  • Online:2018-03-08 Published:2018-03-08
  • About author:Yang Li-feng, Master, Attending physician, Department of Orthopedics, Affiliated 3201 Hospital, Xi’an Jiaotong University, Hanzhong 723000, Shaanxi Province, China
  • Supported by:

    the National High Technology Research and Development Program of China (863 Program), No. 2011AA030101

摘要:

文章快速阅读:

 

文题释义:
内撑器:作者设计了一种新型的股骨头内撑器,组件包括顶盖、撑叶、心柱、顶紧螺帽、封闭套和底盖。采用医用钛合金材料,钛合金无毒、质轻、强度高,具有低弹性模量和高生物相容性,是人体骨组织修复与替换非常理想的医用材料。
股骨头内支撑术:髓芯减压对成人早期股骨头坏死的治疗效果得到了大部分学者的认同,但另一方面使已薄弱的软骨下骨的机械支撑进一步减弱,从而加速了股骨头的塌陷。因此,治疗早期股骨头缺血性坏死不仅应致力于重建和恢复股骨头的活力,还应致力于股骨头塌陷前期的保护,恢复其力学性能,防止股骨头的塌陷。记忆合金网球置入、磷酸钙骨水泥置入、多孔钽金属物可在髓芯减基础上为坏死减压区提供机械支撑。
 
摘要
背景:髓芯减压治疗早期成人股骨头缺血坏死得到大多数学者们的认同,但术后股骨头容易塌陷,如何防止塌陷仍是目前需要解决的问题。
目的:应用有限元法对股骨头内撑器治疗成人早期股骨头缺血性坏死进行生物力学分析,为治疗成人早期股骨头坏死提供生物力学依据。
方法:取青壮年意外死亡新鲜股骨标本1具,大体观无畸形、骨折、经X射线证实,无肿瘤、骨质疏松等病理性骨质病变。应用螺旋CT分别对正常股骨头颈、髓芯减压股骨头颈、内撑器置入并植骨股骨头颈由近端向远端垂直纵轴进行扫描,并获得图像数据。将扫描数据导入Mimics软件,应用有限元法对3种模型股骨头颈部进行生物力学分析。
结果与结论:①正常股骨头受压后应力分散并向下传导,压应力集中在股骨距、张应力集中于转子窝;②髓芯减压后股骨头部负重区应力集中,位移大,应变增大;③内撑器置入并植骨后应力变化与正常股骨头部应力相近;④结果提示,髓芯减压后股骨头负重区应力集中,应变增大,负重区容易塌陷;内撑器置入并植骨模型应力分散,承载负荷大于正常股头颈部,且应变减小,符合正常股骨头颈部的力学性能。

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: 0000-0002-0353-1961(杨立峰)

关键词: 骨科植入物, 数字化骨科, 有限元, 成人早期股骨头坏死, 内撑器, 生物力学

Abstract:

BACKGROUND: Core decompression for early adult ischemic necrosis of femoral head gets the identity of most scholars, but the postoperative femoral head easily experiences collapse. How to prevent collapse is still a problem to be solved currently.

OBJECTIVE: To perform biomechanical analysis of femoral head ischemic necrosis by using the finite element method and to provide biomechanical basis for the treatment of early adult femoral head necrosis.
METHODS: One fresh femur specimen died of accidental death in youth and young adults was obtained, and no deformity or fracture was found. X-ray confirmed that it did not have tumor or osteoporosis. Spiral CT was used to scan normal femoral head and neck, pulp core decompression of femoral head and neck, brace device placement and bone-graft of femoral head and neck for acquiring image data from the proximal to distal vertical longitudinal axis. Scanning data were input in the Mimics software. Finite element method was utilized for biomechanical analysis of femoral head and neck of three models.
RESULTS AND CONCLUSION: (1) The stress dispersal and downward conduction of normal femoral head was concentrated in the shaft of the femur and the tensile stress was concentrated in the rotor socket. (2) After pulp core decompression, the stress concentration, displacement and strain increased in the weight-bearing area of femoral head. (3) The stress of the internal bracing was similar to that of normal femoral head. (4) The stress of weight bearing area of femoral head is concentrated, and the strain is increased, so that weight bearing area is easy to collapse after pulp core decompression. The more stress distribution, more bearing load and less strain of implant and bone graft model, are conformed to the normal mechanical properties of the normal femoral head and neck. 

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 Head Necrosis, Finite Element Analysis, Biomechanics, Tissue Engineering

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