不同[牙合]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

作　　者：杨锋 王梦雅 殷文杰 张政 陈江[3] Yang Feng;Wang Mengya;Yin Wenjie;Zhang Zheng;Chen Jiang(School of Stomatology,Xuzhou Medical University,Xuzhou 221004,China;Department of Stomatology,The Affiliated Hospital of Xuzhou Medical University,Xuzhou 221002,China;School and Hospital of Stomatology,Fujian Medical University,Fuzhou 350002,China)

机构地区：[1]徐州医科大学口腔医学院,徐州221004 [2]徐州医科大学附属医院口腔科,徐州221002 [3]福建医科大学附属口腔医院,福州350002

出　　处：《中国口腔种植学杂志》2024年第1期16-23,共8页Chinese Journal of Oral Implantology

基　　金：江苏省高等学校大学生创新创业训练计划项目(202210313123Y)。

摘　　要：目的通过有限元方法探究即刻负荷状态下不同[牙合]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[牙合]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[牙合]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[牙合]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、9.34μm);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(15.24μm、8.94μm、12.15μm)。与其他[牙合]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[牙合]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[牙合]力轴向传递方面略有优势。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(10.52μm,5.67μm,9.34μm),while prosthodontic platform occlusal(3 points)contact produced the largest displacement of the implant,cortical bone,and cancellous bone(15.24μm,8.94μm,12.15μm).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 [牙合] 即刻负荷 Von Mises应力 初始应力 

分 类 号：R783.6[医药卫生—口腔医学]