中国组织工程研究 ›› 2010, Vol. 14 ›› Issue (46): 8590-.doi: 10.3969/j.issn.1673-8225.2010.46.010

• 组织构建与生物力学 • 上一篇    下一篇

正常与病态眼角膜拉伸力学的特性

王秀玲1,李  爽2   

  1. 1长春工业大学人文信息学院,吉林省长春市 130122;2北京友谊医院眼科,北京市  100730
  • 出版日期:2010-11-12 发布日期:2010-11-12
  • 作者简介:王秀玲★,女,1976年生,汉族,吉林省梨树县人,2007年吉林大学毕业,硕士,讲师,主要从事力学教学与科研工作。 Wx104317769772@163.com

Tensile mechanical properties of normal and pathological corneas

Wang Xiu-ling1, Li Shuang2   

  1. 1College of Humanities & Information, Changchun University of Technology, Changchun  130122, Jilin Province, China; 2Department of Ophthalmology, Beijing Friendship Hospital, Beijing  100730, China
  • Online:2010-11-12 Published:2010-11-12
  • About author:Wang Xiu-ling★, Master, Lecturer, College of Humanities & Information, Changchun University of Technology, Changchun 130122, Jilin Province, China Wx104317769772@163.com

摘要:

背景:角膜移植和人工角膜替代物等研究有必要了解正常和病态眼角膜的拉伸力学特性,以往的研究对象多为动物眼角膜和正常人眼角膜的拉伸力学特性,病态眼角膜的拉伸力学特性鲜有报道。
目的:比较正常和病态眼角膜的拉伸力学性质。
方法:正常人尸体眼角膜和病态(眼角膜移植患者眼角膜)眼角膜各10个,在电子万能试验机上进行拉伸实验。模拟人体温在(36.5±0.5) ℃的温度下,以5 mm/min的实验速度对试样施加载荷,以最小二乘法处理实验数据,拟合应力-应变曲线。
结果与结论:正常对照组眼角膜最大载荷、最大应力、最大应变、最大位移均大于病态组(P < 0.05)。说明正常与病态眼角膜具有不同的拉伸力学特性,病态眼角膜的拉伸力学特性发生改变。

关键词: 眼角膜, 正常, 病态, 一维拉伸, 力学性质, 组织构建

Abstract:

BACKGROUND: It is necessary to understand the tensile properties of normal and pathological cornea for the research of corneal transplant and artificial cornea replacement and so on. There are some researches about animal corneas and normal human corneal tensile mechanical properties in previous studies, but it is rarely reported that of pathological cornea.
OBJECTIVE: To compare the tensile mechanical properties of normal and pathological corneas.
METHODS: Totally 20 normal and pathological corneas (cornea transplant patients) were performed tensile test on the electronic test machine. Temperature was simulated human body at (36.5± 0.5) ℃, and the load was applied using experimental speed of 5 mm/min. The experimental data were processed with minimum 2 multiplications, and the stress - strain curve was fitted.
RESULTS AND CONCLUSION: The corneal maximum load, maximum stress, maximum strain, and maximum displacement of the normal control group were greater than those of the pathological group (P < 0.05). The findings demonstrated that normal and pathological corneas have different tensile properties. The tensile mechanical properties of pathological cornea have some changes.

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