Uddanwadiker R V, Padole P M, Arya H
Mechanical Engineering Department, Visvesvaraya National Institute of Technology, Nagpur, India.
Eur J Prosthodont Restor Dent. 2008 Dec;16(4):146-57.
To obtain an accurate stress distribution pattern of the restored tooth, taking into account non linear properties of Periodontal Ligament (PDL), linear stress and deformation analysis was carried out with four posts, different in constitution and shape. However, as the PDL exhibits non linear behaviour, more accurate results could be expected by simulating the model for non linear properties of PDL. Due to computational difficulties, a simplified model was prepared and non linear stress analysis was carried out. In case of non linear analysis the stresses were decreased by 25% and deformation was increased by 50% approximately as compared to linear static analysis of the restored maxillary central incisor.
为了获得修复后牙齿的精确应力分布模式，考虑到牙周韧带（PDL）的非线性特性，对四种组成和形状不同的桩进行了线性应力和变形分析。然而，由于PDL表现出非线性行为，通过模拟PDL的非线性特性模型有望获得更准确的结果。由于计算困难，制备了一个简化模型并进行了非线性应力分析。与上颌中切牙修复体的线性静态分析相比，在非线性分析的情况下，应力大约降低了25%，变形增加了50%。
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