巩膜的区域性力学性能研究
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国家自然科学基金项目(31300770,31800789,11802196),山西省应用基础研究项目面上青年基金项目(201701D221014)


Regional Mechanical Properties of the Sclera
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    摘要:

    目的 比较不同区域巩膜力学特性的差异。方法 以健康家猪眼为材料,将巩膜分为前部、赤道部和后部3个区域,对整体眼球巩膜的不同区域分别进行局部压痕;沿赤道方向对不同区域巩膜进行环切,制成条带状试件,采用INSTRON 5544材料试验机进行单轴拉伸。结果 正常生理载荷范围内,局部压痕法测得巩膜前部、赤道部、后部的刚度分别为(0.91±0.21)、(0.6±0.16)、(0-39±0.13) MPa;单轴拉伸测得巩膜前部、赤道部、后部的弹性模量分别为(1.28±0.37)、(0.95±0.31)、(0.72±0.28) MPa。结论 局部压痕法能够反映巩膜的区域性力学特性;巩膜前部相比赤道区域及后部具有更强的刚度。实验结果为进一步探讨近视等眼部疾病的发病机理提供参考。

    Abstract:

    Objective To investigate the differences in mechanical properties of the sclera in different regions. Methods The sclera of sus scrofa was divided into 3 regions, namely, anterior, equatorial and posterior area. Local indentation was performed on different areas of the whole sclera. Strip specimens of different regions were circumcised along the equatorial direction, and subjected to uniaxial stretching by INSTRON 5544. Results Within the normal physiological stress range, the stiffness at anterior, equatorial, and posterior area of the sclera measured by local indentation was (0.91±0.21), (0.6±0.16), (0.39±0.13) MPa, respectively. The elastic modulus at anterior, equatorial, and posterior area of the sclera measured by uniaxial stretching was (1-28±0.37), (0.95±0.31), (0.72±0.28) MPa, respectively. Conclusions The local indentation could reflect regional mechanical properties of the sclera. The anterior sclera performed a higher stiffness than the equatorial and posterior areas. The results provide references for further study on the pathogenesis of ocular diseases including myopia.

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范雨田,陈凌峰,高志鹏,郭红梅,宋婕.巩膜的区域性力学性能研究[J].医用生物力学,2020,35(2):178-183

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  • 收稿日期:2019-01-24
  • 最后修改日期:2019-03-25
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  • 在线发布日期: 2020-04-27
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