Wakabayashi Noriyuki, Suzuki Tetsuya
Department of Removable Partial Prosthodontics, Graduate School, Tokyo Medical and Dental University, Tokyo, Japan.
J Dent Biomech. 2013 Apr 4;4:1758736013483298. doi: 10.1177/1758736013483298. Print 2013.
The purpose of this study was to analyze the stress and strain inside of the oral mucosa in partially-edentulous patients. The patient-specific finite element models of the mucosa and the bone were constructed using the CT images and in-vivo surface measurement during a continuous load. The mean initial shear modulus of 8.3 × 10(-5) (GPa) and the mean relaxation time of 503 (s) were determined as the viscoelastic properties of the mucosa. The increase of the highest maximum compressive strain during the continuous loading was observed in all the patients, however; the intensity of strain was not in accordance with the thickness of the mucosa. It is suggested that the variations of the morphology and the initial modulus of the mucosa should be considered in the mathematical approaches to detect the mechanical responses of the oral mucosa.
本研究的目的是分析部分牙列缺损患者口腔黏膜内部的应力和应变。利用CT图像和连续加载过程中的体内表面测量数据，构建了黏膜和骨骼的患者特异性有限元模型。确定黏膜的粘弹性特性为平均初始剪切模量8.3×10^(-5)（GPa）和平均松弛时间503（s）。然而，在所有患者中均观察到连续加载过程中最高最大压缩应变的增加；应变强度与黏膜厚度不一致。建议在检测口腔黏膜力学响应的数学方法中应考虑黏膜形态和初始模量的变化。
