冠外精密附着体对基牙及牙周组织影响的三维有限元分析  

The 3D Finite Element Analysis of Stress Distributions in Abutment And Periodontal Tissues with Extra-coronal Attachment

作　　者：张爱玲[1] 刘展[2] 牟雁东[3] 钱英莉[1] 樊瑜波[2] 

机构地区：[1]四川大学生物力学工程实验室,成都610065 [2]北京航空航天大学生物工程系,北京100083 [3]四川省人民医院口腔科,成都611830

出　　处：《生物医学工程学杂志》2007年第4期717-720,共4页Journal of Biomedical Engineering

基　　金：教育部新世纪人才计划资助;国家自然科学基金资助项目(30370376;10372065)

摘　　要：我们建立了包括下颌骨和切牙、尖牙、前磨牙的双侧游离末端牙列缺失的三维有限元模型,在此基础上又建立了配带精密附着体义齿的模型,考虑基托与缺牙处牙槽嵴间的接触,比较修复前后基牙及其牙周组织、牙列缺失部位牙槽嵴的von Mises应力。结果表明:精密附着体修复后,基牙及基牙根周牙槽骨的von Mises应力值较修复前无论舌侧、颊侧都有了明显增加,应力集中范围增大;牙列缺失部位的应力也有所增加。A 3D finite element model of bilateral distal-extension edentulous dentition, which includes mandible, incisors, canines and premolars, was established in the first place. Based on it, another model with extra-coronal attachments and dentures was also developed. Moreover, contact elements were applied to the regions between the denture and alveolar bone. The yon Mises stress distributions of the abutments and their periodontal tissues, edentulous alveolar bone in the two models were compared. The results indicate that the stresses in the abutments and the alveolar sockets obviously increase at the buccal and lingual sides after reparatlon,and that the stresses on the edentulous alveolar bone also increase.

关 键 词：精密附着体 基牙 牙周膜 有限元 接触 

分 类 号：R783[医药卫生—口腔医学]