• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>European Journal of Dentistry >Biomechanics of cervical tooth region and noncarious cervical lesions of different morphology; three-dimensional finite element analysis
【24h】

Biomechanics of cervical tooth region and noncarious cervical lesions of different morphology; three-dimensional finite element analysis

机译：不同形态的宫颈牙齿区域和非龋性宫颈病变的生物力学;三维有限元分析

获取原文
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Objective: The present study aims to investigate the influence of presence and shape of cervical lesions on biomechanical behavior of mandibular first premolar, subjected to two types of occlusal loading using three-dimensional (3D) finite element method (FEM). Materials and Methods: 3D models of the mandibular premolar are created from a micro computed tomography X-ray image: model of sound mandibular premolar, model with the wedge-shaped cervical lesion (V lesion), and model with saucer-shaped cervical lesion (U lesion). By FEM, straining of the tooth tissues under functional and nonfunctional occlusal loading of 200 (N) is analyzed. For the analysis, the following software was used: CTAn program 1.10 and ANSYS Workbench (version 14.0). The results are presented in von Mises stress. Results: Values of calculated stress in all tooth structures are higher under nonfunctional occlusal loading, while the functional loading is resulted in homogeneous stress distribution. Nonfunctional load in the cervical area of sound tooth model as well as in the sub-superficial layer of the enamel resulted with a significant stress (over 50 [MPa]). The highest stress concentration on models with lesions is noticed on the apex of the V-shaped lesion, while stress in saucer U lesion is significantly lower and distributed over wider area. Conclusion: The type of the occlusal teeth loading has the biggest influence on cervical stress intensity. Geometric shape of the existing lesion is very important in the distribution of internal stress. Compared to the U-shaped lesions, V-shaped lesions show significantly higher stress concentrations under load. Exposure to stress would lead to its progression.
机译：目的：本研究旨在利用三维（3D）有限元方法（FEM）研究颈椎病变的存在和形状对下颌第一前磨牙在两种咬合载荷下的生物力学行为的影响。材料和方法：从显微计算机断层扫描X射线图像创建下颌前磨牙的3D模型：正常的下颌前磨牙模型，楔形宫颈病变（V病变）模型和碟形宫颈病变（病变）。通过有限元分析，分析了在功能性和非功能性咬合负荷为200（N）时牙齿组织的应变。为了进行分析，使用了以下软件：CTAn程序1.10和ANSYS Workbench（版本14.0）。结果以von Mises应力表示。结果：在非功能性咬合载荷下，所有牙齿结构的计算应力值都较高，而功能性载荷导致应力分布均匀。健全牙齿模型的子宫颈区域以及牙釉质的亚浅表层中的非功能性负载产生了很大的应力（超过50 [MPa]）。在带有损伤的模型上，最高的应力集中在V形损伤的顶点上，而碟形U形损伤的应力明显较低，并且分布在更大的区域。结论：咬合牙负荷的类型对宫颈压力强度影响最大。现有病变的几何形状在内部应力分布中非常重要。与U形病变相比，V形病变在负荷下表现出明显更高的应力集中。承受压力会导致其发展。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号