不同光滑颈圈种植体修复时应力分布的三维有限元分析  

Three-dimensional finite element analysis of stress distribution in different smooth collar implants

作　　者：孙江伟 王俊祥 白布加甫·叶力思 代慧娟 尼加提·吐尔逊[1] Sun Jiangwei;Wang Junxiang;Baibujiafu·Yellisi;Dai Huijuan;Nijati·Turson(Department of Stomatology,The Second Affiliated Hospital of Xinjiang Medical University,Urumqi 830063,Xinjiang Uygur Autonomous Region,China)

机构地区：[1]新疆医科大学第二附属医院口腔科,新疆维吾尔自治区乌鲁木齐市830063

出　　处：《中国组织工程研究》2023年第7期1004-1011,共8页Chinese Journal of Tissue Engineering Research

基　　金：新疆维吾尔自治区自然科学基金项目(2016D01C192),课题名称:维药买朱尼对种植体周围炎龈沟液中IL-β1以及骨界面改建影响的实验研究,项目负责人:尼加提·吐尔逊。

摘　　要：背景:在口腔种植修复治疗中,软组织水平种植体区别于骨水平种植体采用非埋入式手术方式,良好的颈部设计能够促进骨结合或减少边缘性骨吸收,并有利于形成稳定的软组织封闭,故种植体颈部结构设计是种植修复成功的关键因素之一。目的:运用三维建模和有限元分析软件,模拟分析4种不同光滑颈圈种植体修复下颌磨牙时种植体修复体及种植体-骨界面的应力分布情况。方法:选取1例拟行下颌第一磨牙种植修复患者的锥形束CT影像资料,采用Mimics 21.0软件建立下颌骨模型,将颌骨模型导入Solidworks2018软件,构建标准常规颈种植体(高度2.8mm,直径4.8mm)、标准宽颈种植体(高度2.8mm,直径6.5mm)、美学常规颈种植体(高度1.8 mm,直径4.8 mm)、美学宽颈种植体(高度1.8 mm,直径6.5 mm)4组光滑颈圈种植体模型,对4种模型进行纯钛基台、氧化锆全冠螺丝固位修复,对比分析垂直向和斜向载力方向下,4组光滑颈圈种植修复体及种植体-骨界面的Von-Mises应力分布情况。结果与结论:①无论是垂直加载还是斜向加载,各组种植体Von-Mises应力峰值均位于种植体颈部区域,种植体-骨界面应力峰值均位于种植体颈部皮质骨区域;②当使用相同光滑颈圈种植体时,斜向加载的种植体所受Von-Mises应力峰值大于垂直加载;③垂直加载或斜向加载时,常规颈标准种植体所受最大Von-Mises应力大于宽颈标准种植体,常规颈美学种植体所受最大Von-Mises应力小于宽颈美学种植体;④垂直加载或斜向加载时,宽颈标准种植体组种植体-骨界面所受最大Von-Mises应力均小于其他光滑颈圈组;⑤结果表明,不同光滑颈圈种植体修复时种植修复体及种植体-骨界面应力分布存在差异。BACKGROUND:In oral implant repair,soft tissue level implants are different from bone level implants,which adopt non-embedded surgical methods.A good neck design can promote bone bonding or reduce marginal bone absorption and facilitate the formation of stable soft tissue sealing.Therefore,the neck structure design of implants is one of the key factors for the success of implant repair.OBJECTIVE:To simulate and analyze the stress distribution of implant components and implant-bone interface during the restoration of mandibular molars with four different smooth collar implants using three-dimensional modeling and finite element analysis software.METHODS:The cone-beam CT image data of a patient undergoing mandibular first molar implantation were selected,and the mandible model was established by Mimics 21.0 software.The mandible model was imported into Solidworks 2018 software.Smooth neck implant models were constructed as follows:the standard conventional cervical implant(2.8 mm in height,4.8 mm in diameter),standard wide cervical implant(2.8 mm in height,6.5 mm in diameter),aesthetic conventional neck implant(1.8 mm in height,4.8 mm in diameter),and aesthetic wide neck implant(1.8 mm in height,6.5 mm in diameter).The four models were repaired with pure titanium base table and zirconia full-crown screw fixation.The von-Mises stress distribution of implant components and the implant-bone interface in four groups of different smooth collar implants were compared and analyzed under vertical and oblique loadings.RESULTS AND CONCLUSION:(1)Whether it was vertical loading or oblique loading,the peak values of von-Mises stress were located in the neck region of the implant,and the peak values of von-Mises stress at the implant-bone interface were located in the cortical bone region of the neck region of the implant.(2)When using the same smooth collar implant,compared with the vertical loading group,the peak values of Von-Mises stress were greater in the four different smooth collar implants in the oblique loading group.(3

关 键 词：光滑颈圈 应力 有限元分析 种植修复体 种植体边缘骨水平 加载方式 咬合 

分 类 号：R459.9[医药卫生—治疗学] R318[医药卫生—临床医学] R783.4