不同骨质条件下超短种植体应用于下颌后牙区的有限元分析  

Finite element analysis of ultrashort implants applied to the mandibular posterior tooth area under different bone conditions

作　　者：孜拉来·居来提 马吾兰江·阿不都仁木 艾克丽亚·艾尼瓦尔 热依拉·库尔班 尼加提·吐尔逊[1] Zilalai·Julaiti;Mawulanjiang·Abudurenmu;Aikeliya·Ainiwaer;Reyila·Kuerban;Nijiati·Tuersun(Department of Stomatology,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》2025年第22期4679-4686,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(2021D01C362)。

摘　　要：背景:有研究利用三维有限元方法分析了种植体在不同皮质骨厚度中的应力情况,得出皮质骨厚度影响种植体-骨界面位移值、等效应力值及种植体各部件等效应力值的结果。目前超短种植体在不同下颌骨骨质中的临床应用还存在不确定性。目的:利用三维有限元法分析超短种植体在下颌骨不同骨质中的应力分布及骨组织的应力分布情况。方法:选取1名下颌第1磨牙缺失患者的CT影像资料,利用Mimics软件创建下颌骨第1磨牙区域的模型,根据超短种植体奥齿泰系统中5 mm×5 mm TSⅢ型号绘制出所需要的植体及上部修复体模型,使用Geomagic Studio的偏置命令获取下颌4类不同骨质的模型(Ⅰ、Ⅱ、Ⅲ、Ⅳ类),将所有模型整合并交叉组合,给予不同方向载荷,分析各类模型受力后的范氏等效应力分布。结果与结论:(1)垂直载荷时:皮质骨最大应力在Ⅰ、Ⅱ、Ⅲ类骨质中相对于Ⅳ类骨更趋向于稳定,力也从分散于种植体周围到Ⅳ类骨时逐渐集中至种植体颈部与皮质骨连接处;Ⅰ类骨中最大等效应力峰值在中央螺丝区域,Ⅱ、Ⅲ、Ⅳ类骨中最大应力峰值则统一在种植体颈部与基台连接处。(2)侧向载荷时:皮质骨最大应力随着骨质条件的减弱呈逐渐增大的趋势;Ⅰ-Ⅳ类骨质中,最大应力峰值都集中在种植体与基台连接处,Ⅰ-Ⅲ类骨中种植体本身所受应力随着骨质的减弱表现出逐渐增大的趋势,到Ⅳ类骨时应力有所减小,此规律同样适用于修复体基台以及松质骨所受应力。(3)各类骨质中侧向载荷时所受到的最大应力值比垂直向载荷更大。BACKGROUND:Three-dimensional finite element method was used to analyze the stress of implants in different cortical bone thicknesses,and the results showed that cortical bone thickness affected the displacement value of the implant-bone interface,the equivalent stress value,and the equivalent stress value of each component of the implant.There are still uncertainties in the clinical application of ultrashort implants in different mandibular bones.OBJECTIVE:To analyze the stress distribution of ultrashort implant in different bone and bone tissue of mandible by three-dimensional finite element method.METHODS:Cone-beam CT images of a patient with missing mandibular first molar were selected.Mimics software was used to create the model of the first molar region of the mandible.The required implant and upper prosthesis models were drawn according to the model of TS IIIφ5 mm×5 mm in the Orthodontic system.Geomagic Studio bias command was used to obtain the models of four different types of mandibular bone(classes I,II,III,and IV).All the models were integrated and cross-combined to give different directions of loading so as to analyze the Fann equivalent stress distribution of each model after being stressed.RESULTS AND CONCLUSION:(1)Under vertical loading,the maximum stress of cortical bone in classes I,II,and III bone tended to be more stable than that in class IV bone,and the force gradually concentrated from around implant to the junction between implant neck and cortical bone when it was distributed in class IV bone.The peak value of equivalent stress in class I bone was in the screw region.In classes II,III,and IV bone,the maximum stress peak was at the junction between the implant neck and the abutment.(2)Under lateral loading,the maximum stress of cortical bone increased gradually with the weakening of bone condition.The maximum stress peaks in I-IV bone were concentrated at the junction of implant and abutment.In classes I-III bone,the stress of implant itself increased gradually with the weakening of bone,

关 键 词：超短种植体 三维有限元 不同骨质 应力分布 骨组织 

分 类 号：R496[医药卫生—康复医学] R318[医药卫生—临床医学] R782