Finite element analysis of stress distribution of obturator prostheses for acquired unilateral maxillary defects
Finite element analysis of stress distribution of obturator prostheses for acquired unilateral maxillary defects作者机构：Department of Stomatology the Second Xiangya Hospital Central South University Changsha 410011 China Department of Prosthodontics School of Stomatology Peking University Beijing 100081 China Department of Stomatology the Second Xiangya Hospital Central South University Changsha 410011 China
出 版 物：《Journal of Central South University of Technology》 (中南工业大学学报（英文版）)
年 卷 期：2005年第12卷第z1期
页 面：365-368页
核心收录：
学科分类：1003[医学-口腔医学] 100302[医学-口腔临床医学] 10[医学]
基 金：the Hunan Science and Technology Committes(1013--28) Hunan Public Healthy Department(2003007)
主 题：maxillary defect obturator prosthesis 3-dimention finite element stress
摘 要：Objective To assess stresses produced by different obturator prostheses. Methods Three-dimensional finite clement models of unilateral maxillary defects rehabilitated with different obturators were constructed. The different stresses were analyzed by three-dimensional finite element method under different load angle. Results The Von Mises stress values obtained for the remaining tissues adjacent to defect cavity were higher when rehabilitated by inferior hollow obturator in comparison with by superior hollow obturator. The maximum of Von Mises were higher when rehabilitated by resilient hollow obturator than by rigid hollow obturator. It was also observed that in the rigid type stress distribution contours formed in the remaining tissues adjacent to defect cavity, while in resilient hollow obturator prostheses the stress distributed mainly in the prosthesis itself. The oblique load shows the most maximum of Von Mises among all types of obturator prostheses. Conclusions A high lateral wall of an obturator may be more better in preserving the remaining structures than a shorter prosthesis lateral wall. A soft liner may be incorporated to reduce the pain of the residual maxillary structures and mucosa. When load on defect, higher stress would be generated to the residual maxillary structures. The adjustment of occlusual relationship is very important.
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