Three-Dimensional Finite Element Analysis of Implant-Supported Overdenture with Lingual Metal-Reinforced Bar

Xinyue ZHANG; Yong WANG; Qian CHEN; Tuanfeng ZHOU; Kenan MA; Zixuan WANG; Yijiao ZHAO

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Three-Dimensional Finite Element Analysis of Implant-Supported Overdenture with Lingual Metal-Reinforced Bar

VernacularTitle:舌侧金属加强杆种植覆盖义齿的三维有限元分析
Author: Xinyue ZHANG ^{1
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6} ; Yong WANG ; Qian CHEN ; Tuanfeng ZHOU ; Kenan MA ; Zixuan WANG ; Yijiao ZHAO
Author Information

1. 北京大学口腔医学院·口腔医院,数字化研究中心
2. 国家口腔医学中心
3. 国家口腔疾病临床医学研究中心
4. 口腔生物材料和数字诊疗装备国家工程研究中心
5. 国家卫生健康委口腔数字医学重点实验室
6. 口腔数字医学北京市重点实验室,北京 100081
Keywords: overdenture; implant; denture base; finite element analysis
From: Journal of Medical Biomechanics 2024;39(3):532-538
CountryChina
Language:Chinese
Abstract: Objective To investigate the biomechanical effects of lingual metal-reinforced denture bases on edentulous implant-supported prostheses by three-dimensional finite element analysis,and provide references for the treatment of edentulous jaws.Methods Two implant-supported Locator-type overdenture models with lingual metal-reinforced and non-reinforced denture bases were constructed.A 150 N vertical load on the fovea of the posterior teeth,a 150 N oblique load on the fovea of the posterior teeth,and a 150 N vertical load on the anterior teeth were applied to simulate the centric occlusion,left and right lateral chewing,and anterior teeth cutting,and stresses on the tissues of two models were analyzed.Results When the posterior and anterior teeth were loaded vertically,the stress distribution on each organization was similar between the two denture base designs.The maximum stress difference was between 0 and 0.16 MPa.Under unilateral masticatory chewing,the range of stress concentration on denture base,implant and mucoperiosteum,and the maximum stress of the implant and peri-implant bone without metal reinforcement were significantly greater than those with metal reinforcement,and the maximum stress difference was between 0.59 MPa and 2.99 MPa.Conclusions Lingual metal-reinforced denture base can play a role in stress dispersion,or reduce the risk of bone resorption and denture base fracture to a certain extent.