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首页> 外文期刊>Journal of biomechanical engineering. >Mechanical Properties of Orbital Fat and Its Encapsulating Connective Tissue
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Mechanical Properties of Orbital Fat and Its Encapsulating Connective Tissue

机译：眼眶脂肪及其包裹结缔组织的力学性能

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摘要

There is an increasing need to understand the mechanical properties of human orbital fat and its encapsulating connective tissue (OFCT), but such knowledge is not available in the current literature. The purpose of the present study is to examine the mechanical properties of the OFCT. From 5 pairs of 76- to 92-year-old Caucasian human eyes and 33 5- to 7-month-old porcine eyes, 5 human and 11 porcine OFCT samples were dissected at the posterior pole or adjacent to the pole in the vertical, horizontal, and radial directions. Sample dimensions were fixed or measured. Tensile tests were performed on the samples in body-temperature saline. The stress-strain relationship was first approximately linear and then became nonlinear. The linear, the neo-Hookean, and the Mooney-Rivlin constants are reported in Tables 1 and 2. No statistical difference was found among their properties in the different directions in either the human or the porcine samples. Statistical differences were found between the human and the porcine material constants in the horizontal and radial directions. Among our material models, only the Mooney-Rivlin model was able to capture the mechanical properties of the OFCT in large deformation properly. The Mooney-Rivlin model was especially adaptive to the human data. This is the first time the mechanical properties of the human and porcine OFCT have been examined in the literature. We believe our data will provide valuable information to others regarding designing implant biomaterials in orbital treatments and developing computer models to study orbital biomechanics.
机译：越来越需要了解人类眼眶脂肪及其包囊结缔组织（OFCT）的机械性能，但是在当前文献中尚无此类知识。本研究的目的是检查OFCT的机械性能。从5对76至92岁的高加索人眼和33对5至7个月大的猪眼中，在垂直方向上的后极或邻近极处解剖5个人和11个猪的OFCT样本，水平和径向。样品尺寸是固定的或测量的。在体温生理盐水中对样品进行拉伸测试。应力-应变关系首先近似线性，然后变为非线性。表1和表2列出了线性常数，新霍克常数和门尼-里夫林常数。在人或猪样品中，它们在不同方向上的性质之间未发现统计学差异。在水平方向和径向方向上，人类和猪的材料常数之间存在统计学差异。在我们的材料模型中，只有Mooney-Rivlin模型能够正确捕获大变形中OFCT的机械性能。 Mooney-Rivlin模型尤其适用于人类数据。这是文献中首次检查人和猪OFCT的机械性能。我们相信我们的数据将为其他人提供有关在轨道治疗中设计植入物生物材料以及开发计算机模型以研究轨道生物力学的宝贵信息。

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