不同特征对后牙种植单冠生物力学影响的有限元分析
Finite element analysis of the effect of different occlusal characteristics on the biomechanical behavior of posterior implant-supported single crown
杨锋 1王梦雅 2殷文杰 2张政 2陈江3
作者信息
- 1. 徐州医科大学口腔医学院,徐州 221004;徐州医科大学附属医院口腔科,徐州 221002
- 2. 徐州医科大学口腔医学院,徐州 221004
- 3. 福建医科大学附属口腔医院,福州 350002
- 折叠
摘要
目的 通过有限元方法探究即刻负荷状态下不同特征对后牙种植单冠种植体-骨界面生物力学变化的影响,以期为临床特征的选择提供参考.方法 利用过盈配合法建立即刻负荷种植义齿及周围骨组织有限元模型后,参照天然牙设计6种不同的特征,使用Ansys Workbench 2021 R2软件分别进行轴向200 N静态加载分析,对所有数据进行对比分析后,评估不同特征对种植体-骨界面位移、Von Mises应力等的影响.结果 A-B-C咬合接触可获得最小的种植体及周围骨皮质和骨松质的位移(10.52μm、5.67μm、9.34 μm);修复平台咬合(3点)接触产生了最大的种植体、骨皮质、骨松质位移(15.24 μm、8.94μm、12.15 pm).与其他接触类型相比,A-B咬合接触产生了最大的种植体Von Mises应力(71.91 MPa),明显降低了骨皮质和骨松质的最大Von Mises应力(18.04 MPa,17.81 MPa).结论 即刻负荷状态下不同的特征显著影响种植体-骨界面的位移及Von Mises应力分布,改变了应力集中位点;A-B-C咬合接触有利于减小种植体及周围骨组织的Von Mises应力,A-B咬合设计在力轴向传递方面略有优势.
Abstract
Objective The purpose of this study is to investigate the effect of occlusal characteristics on the biomechanical behavior of the implant-bone interface of a posterior implant-supported single crown under immediate loading,using finite element analysis.This aims to provide reference for the selection of clinical occlusal characteristics.Methods The finite element model of an implant-supported crown with immediate loading and surrounding bone was constructed using the interference fit method.Six different occlusal characteristics were designed according to natural teeth.Ansys Workbench 2021 R2 software was used to analyze the axial static loading of 200 N.All the data were evaluated using the comparative analysis method to assess the impact of different occlusal characteristics on implant-bone interface displacement and Von Mises stress.Results A-B-C occlusal contact produced the smallest displacement of the implant and surrounding cortical and cancellous bone(10.52 pm,5.67 pm,9.34 pm),while prosthodontic platform occlusal(3 points)contact produced the largest displacement of the implant,cortical bone,and cancellous bone(15.24pm,8.94pm,12.15 pm).Compared with other occlusal contact types,A-B occlusal contact produced the largest Von Mises stress in the implant(71.91 MPa),significantly reduced the maximum Von Mises stress in cortical bone and had the largest maximum Von Mises stress in cancellous bone(18.04 MPa,17.81 MPa).Conclusion Different occlusal characteristics significantly affect the displacement and Von Mises stress distribution at the implant-bone interface under immediate loading,and also change the stress concentration sites.A-B-C occlusal contact is beneficial in reducing the Von Mises stress on the implant and surrounding bone tissues,while A-B occlusal design has a slight advantage in the axial transmission of occlusal force.
关键词
位移//即刻负荷/Von/Mises应力/初始应力Key words
Displacement/Occlusion/Immediate loading/Von Mises stress/Initial stress引用本文复制引用
基金项目
江苏省高等学校大学生创新创业训练计划项目(202210313123Y)
出版年
2024
国家科技期刊平台
NSTL
万方数据