中国组织工程研究 ›› 2019, Vol. 23 ›› Issue (4): 545-550.doi: 10.3969/j.issn.2095-4344.0571

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

基于有限元法分析钙化软骨层的生物力学作用

陈凯宁1,叶 青1,农明善1,罗柳宁1,杨 幸1,陈 诚2,王富友2   

  1. 1武警广西总队医院骨科,广西壮族自治区南宁市   5300032陆军军医大学(第三军医大学)西南医院关节外科,重庆市   400038
  • 出版日期:2019-02-08 发布日期:2019-02-08
  • 作者简介:陈凯宁,男,1979年生,广西壮族自治区南宁市人,汉族,2013年第三军医大学毕业,博士,主治医师,主要从事关节生物力学研究。
  • 基金资助:

    国家自然科学基金重点项目(81271981),项目负责人:王富友;广西自然科学基金(2015GXNSFAA139168),项目负责人:陈凯宁

Biomechanical function of calcified cartilage zone based on finite element analysis

Chen Kaining1, Ye Qing1, Nong Mingshan1, Luo Liuning1, Yang Xing1, Chen Cheng2, Wang Fuyou2   

  1. 1Department of Orthopedics, Guangxi General Hospital of Chinese People’s Armed Police Force, Nanning 530003, Guangxi Zhuang Autonomous Region, China; 2Department of Joint Surgery, Southwest Hospital, Army Medical University (the Third Military Medical University), Chongqing 400038, China
  • Online:2019-02-08 Published:2019-02-08
  • About author:Chen Kaining, MD, Attending physician, Department of Orthopedics, Guangxi General Hospital of Chinese People’s Armed Police Force, Nanning 530003, Guangxi Zhuang Autonomous Region, China
  • Supported by:

    the National Natural Science Foundation of China, No. 81271981 (to WFY); the Natural Science Foundation of Guangxi Zhuang Autonomous Region, No. 2015GXNSFAA139168 (to CKN)

摘要:

文章快速阅读:

 
 

 

文题释义:
钙化软骨层:是位于透明软骨和软骨下骨之间的界面连接结构,厚100-300 μm,向上通过波浪状的潮线与透明软骨牢固连接,向下通过梳齿状的粘合线与软骨下骨紧密铆合。钙化软骨层中不仅有软骨细胞和胶原纤维,还有大量的钙盐沉积在细胞外基质中,但Ⅱ型胶原纤维含量低于透明软骨,羟基磷灰石钙盐含量低于软骨下骨。
关节骨软骨组织:是由关节软骨和软骨下骨组成的复合结构。关节软骨可按胶原纤维方向由浅至深分为浅表层、过渡层、辐射层和钙化软骨层,前 3 层又统称为透明软骨或非钙化软骨。透明软骨和软骨下骨通过钙化软骨层介导形成一个既彼此独立又互相影响的功能单元。该功能单元在关节承受负荷时发挥着吸收应力和传递负荷的重要作用。
 
摘要
背景:钙化软骨层为柔软的透明软骨与坚硬的软骨下骨能够稳定连接提供了重要保障。但目前对钙化软骨层在此中发挥的生物力学作用并不十分清楚。
目的:利用有限元分析技术探讨钙化软骨层的生物力学作用。
方法:自愿捐赠的人体正常股骨髁标本1个,依据仿生学原理,构建骨软骨复合组织的三维有限元模型。该模型包含透明软骨、钙化软骨层和软骨下骨3层结构。对模型分别施加压缩载荷(0.5-3.0 MPa)与剪切载荷(0.1-0.5 MPa),分析3层结构的应力分布情况。
结果与结论:①在压缩与剪切载荷作用下,透明软骨的应力峰值范围分别为0.15-0.86 MPa与0.58-0.74 MPa,钙化软骨层的应力峰值范围分别为0.33-1.91 MPa与1.27-1.62 MPa,软骨下骨的应力峰值范围分别为0.55-3.22 MPa与2.36-2.98 MPa;②有限元分析法通过钙化软骨层的应力分布特征揭示了其生物力学作用,即介导负荷以逐级递增方式从透明软骨传至软骨下骨,使负荷在骨软骨复合组织的3层结构中得以顺利传递。

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: 0000-0002-0278-6217(陈凯宁)

关键词: 透明软骨, 钙化软骨层, 软骨下骨, 有限元分析, 软骨生物力学, 数字化骨科

Abstract:

BACKGROUND: Calcified cartilage zone is important for the stable connection between soft hyaline cartilage and hard subchondral bone. But the biomechanical role of calcified cartilage zone played in this process is poorly understood.

OBJECTIVE: To explore the biomechanical role of calcified cartilage zone using finite element analysis.
METHODS: Human normal femoral condyle specimen from a volunteer was obtained. According to the principle of bionics, a three-dimensional finite element model of osteochondral tissue was created with three compositions: hyaline cartilage, calcified cartilage zone and subchondral bone. The compression load (0.5-3.0 MPa) and shear load (0.1-0.5 MPa) were applied to the model respectively in order to analyze the stress distributions of three compositions.
RESULTS AND CONCLUSION: Under compression load and shear load, the maximum stress of hyaline cartilage was 0.15-0.86 MPa and 0.58-0.74 MPa, respectively. The maximum stress of calcified cartilage zone was 0.33-1.91 MPa and 1.27-1.62 MPa, respectively. The maximum stress of subchondral bone was 0.55-3.22 MPa and 2.36-2.98 MPa, respectively. Finite element analysis reveals the biomechanical role of calcified cartilage zone through the feature of its stress distribution. It mediates the load transfer from hyaline cartilage to subchondral bone in a stepwise-increase way, so that the load can transfer smoothly in three compositions of osteochondral tissue. 

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: Cartilage, Bone and Bones, Finite Element Analysis, Biomechanics, Tissue Engineering

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