Finite Element Analysis of Implant Supported Removable Partial Denture
会议名称：《中华口腔医学会第14次全国口腔医学学术会议（2012年会）》
会议日期：2012年
学科分类：1003[医学-口腔医学] 100302[医学-口腔临床医学] 10[医学]
关 键 词：implant removable partial denture attachment finite element analysis
摘 要：Nowadays there are lots of patients who are wearing removable partial dentures (RPD)among elder population in our ***,outcome of this therapy is not that ideal especially Kennedy I partially edentulous *** are many complications such as mucosa tenderness,abutment trauma and so *** idea of combination of RPD and implant therapy came up to solve those *** treatment is called Implant-supported Removable Partial Dentures(ISRPDs).ISRPDs contains both advantages of RPD and implant,which means improvement of stability and supporting. Objective:Analyze the stress distributions of ISRPDs and supporting tissues in Kennedy I partially edentulous mandible,and compare influence of different retention attachments on stress among supporting structures. Material and Method:By 3-dimensional laser scanner and CAD software,a basic partially edentulous model was *** attachment and RPD were added in to build three models:RPD only,RPD + implant + locator attachment,RPD + implant + magfit *** 80N vertical and inclined loads on artificial teeth *** stress distribution by 3-dimensional finite element analysis software. Results:Addition of implant transferred the stress concentration area to the cortical bone next to cervical of *** of cortical bone at the same location of edentulous area decreased *** of denture was smaller in Locator and Magfit *** two attachments,cortical bone stress was higher in Locator model. Conclusion:Existence of implant could reduce maximum von Mises stress value of supporting *** magfit and locator attachment,stress value of implant’s apex was lower in magfit *** attachment could improve stability of denture.