华西口腔医学杂志Issue(3)：286-290,5.DOI:10.7518/hxkq.2015.03.015
动态载荷下不同骨质对天然牙-种植体联合修复应力分布的影响
Evaluation of the stress distribution in tooth implant-supported fixed partial prostheses on different bone types under dynamic loads
摘要
Abstract
ObjectiveThis study aims to evaluate the influence of different bone types on the stress distribution in tooth implant-supported fixed partial prostheses by using finite element (FE) analysis. Methods Four FE models of mandibular arch containing one implant splinted to the mandibular second premolar were built according to bone types Ⅰ, Ⅱ, Ⅲ, and Ⅳ. Dy-namic loads of 250 N were applied to the buccal and lingual cusps of the prostheses in different directions to simulate the mas-ticatory cycle. The maximum Von Mises stresses were calculated using the FE analysis software. Results The maximum Von Mises stresses of the cortical bones were 89.229, 91.860, 125.840, and 158.420 MPa, increasing from type Ⅰ to type Ⅳ, respec-tively. The maximum Von Mises stresses of the trabecular bone were 58.584, 43.645, 21.688, and 18.249 MPa, decreasing from type Ⅰ to type Ⅳ, respectively. During the process of dynamic loading, the maximum Von Mises stresses of the cortical and trabecular bones followed the order buccal to tongue loading>tongue to buccal loading>vertical loading. Conclusion The results showed that bone type significantly influenced the stress distribution in bones, and that for tooth implant-supported fixed partial prostheses, bone types Ⅰ and Ⅱ were a better choice than bone types Ⅲ and Ⅳ. More caution should be exer-cised when restoring missing teeth using tooth implant-supported fixed partial prostheses in softer bone regions.关键词
天然牙-种植体联合修复/骨质/动态载荷/有限元分析Key words
tooth implant-supported fixed partial prostheses/bone quality/dynamic loads/finite element analysis分类
医药卫生引用本文复制引用
张杨,王超,张晓南,徐凌..动态载荷下不同骨质对天然牙-种植体联合修复应力分布的影响[J].华西口腔医学杂志,2015,(3):286-290,5.基金项目
重庆市卫生局医学科研基金资助项目 （）
