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首页> 外文期刊>Journal of Biomechanics >Tensile and compressive behaviour of the bovine periodontal ligament
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Tensile and compressive behaviour of the bovine periodontal ligament

机译：牛牙周膜的拉伸和压缩行为

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摘要

The mechanical response of the bovine periodontal ligament (PDL) subjected to uniaxial tension and compression is reported. Several sections normal to the longitudinal axis of bovine incisors and molars were extracted from different depths. Specimens with dimensions 10 x 5 x 2 turn including dentine, PDL and alveolar bone were obtained from these sections. Scanning electron microscopy suggested a strong similarity between the bovine PDL and the human PDL microstructure described in the literature. The prepared specimens were tested in a custom made uniaxial testing machine. They were clamped on their bone and dentine extremities and immersed in a saline solution at 37degreesC. Stress-strain curves indicated that the PDL is characterized by a non-linear and time-dependent mechanical behaviour with the typical features of collagenous soft tissues. The curves exhibited hysteresis and preconditioning effects. The mechanical parameters evaluated in tension were maximum tangent modulus, strength, maximizer strain and strain energy density. For the molars, all these parameters increased with depth except for the apical region. For the incisors, all parameters increased with depth except ultimate strain which decreased. It was assumed that collagen fibre density and orientation were responsible for these findings. (C) 2003 Elsevier Ltd. All rights reserved. [References: 10]
机译：牛牙周膜（PDL）的机械响应受到单轴拉伸和压缩的报道。从不同深度提取了垂直于牛门齿和臼齿纵轴的多个切片。从这些切片中获得了尺寸为10 x 5 x 2圈的标本，包括牙本质，PDL和牙槽骨。扫描电子显微镜表明，文献中描述的牛PDL和人PDL微观结构之间有很强的相似性。制备的样品在定制的单轴测试机中测试。将它们夹在骨头和牙本质上，并浸入37℃的盐水溶液中。应力-应变曲线表明，PDL具有非线性和时间依赖性的机械行为，具有胶原软组织的典型特征。曲线表现出磁滞和预处理效果。拉伸时评估的机械参数为最大切线模量，强度，最大应变和应变能密度。对于磨牙，除了根尖区域，所有这些参数都随深度增加。对于切牙，除极限应变减小外，所有参数均随深度增加。假定胶原纤维的密度和方向是这些发现的原因。 （C）2003 Elsevier Ltd.保留所有权利。 [参考：10]

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