舌侧金属加强杆种植覆盖义齿的三维有限元分析  

Three-Dimensional Finite Element Analysis of Implant-Supported Overdenture with Lingual Metal-Reinforced Bar

作　　者：张馨月[1] 王勇[1] 陈倩 周团锋[2] 马珂楠 王子轩 赵一姣[1] ZHANG Xinyue;WANG Yong;CHEN Qian;ZHOU Tuanfeng;MA Kenan;WANG Zixuan;ZHAO Yijiao(Center of Digital Dentistry,Peking University School and Hospital of Stomatology,National Center for Stomatology,National Clinical Research Center for Oral Diseases,National Engineering Research Center of Oral Biomaterials and Digital Medical Devices,NHC Key Laboratory of Digital Stomatology,Beijing Key Laboratory of Digital Stomatology,Beijing 100081,China;The Clinical Division,Peking University School and Hospital of Stomatology,Beijing 100034,China;Dental Laboratory,Peking University School and Hospital of Stomatology,Beijing 100081,China)

机构地区：[1]北京大学口腔医学院·口腔医院,数字化研究中心,国家口腔医学中心,国家口腔疾病临床医学研究中心,口腔生物材料和数字诊疗装备国家工程研究中心,国家卫生健康委口腔数字医学重点实验室,口腔数字医学北京市重点实验室,北京100081 [2]北京大学口腔医院门诊部,北京100034 [3]北京大学口腔医院义齿加工中心,北京100081

出　　处：《医用生物力学》2024年第3期532-538,共7页Journal of Medical Biomechanics

基　　金：国家自然科学基金项目(82271039,82071171);国家重点研发计划项目(2022YFC2405401);甘肃省重点研发计划项目(21YF5FA165)。

摘　　要：目的 通过三维有限元分析探讨舌侧金属加强结构义齿基托设计对无牙下颌种植修复义齿的生物力学影响,为无牙颌修复治疗提供参考。方法 构建舌侧金属加强结构与无加强结构两种义齿基托设计的2颗种植体支持Locator式覆盖义齿三维有限元模型,分别对后牙中央窝垂直施加150 N载荷、斜向施加150 N载荷以及对前牙垂直施加150 N载荷,模拟正中咬合、左右侧方咀嚼以及前牙切割食物时两种模型各组织的受力情况。结果 后牙及前牙垂直向加载时,两种义齿基托设计模型各组织的应力分布较为接近,所受最大应力差别在0~0.16 MPa之间;偏侧咀嚼时,未添加金属加强杆的义齿基托、种植体和黏骨膜应力集中范围,以及种植体、种植体周围骨最大受力明显大于添加金属加强杆模型,所受最大应力差别在0.59~2.99 MPa之间。结论 在义齿基托舌侧添加金属加强杆,可以起到应力分散的作用,或可在一定程度上减小骨吸收及基托折断的风险。Objective To investigate the biomechanical effects of lingual metal-reinforced denture bases on edentulous implant-supported prostheses by three-dimensional finite element analysis,and provide references for the treatment of edentulous jaws.Methods Two implant-supported Locator-type overdenture models with lingual metal-reinforced and non-reinforced denture bases were constructed.A 150 N vertical load on the fovea of the posterior teeth,a 150 N oblique load on the fovea of the posterior teeth,and a 150 N vertical load on the anterior teeth were applied to simulate the centric occlusion,left and right lateral chewing,and anterior teeth cutting,and stresses on the tissues of two models were analyzed.Results When the posterior and anterior teeth were loaded vertically,the stress distribution on each organization was similar between the two denture base designs.The maximum stress difference was between 0 and 0.16 MPa.Under unilateral masticatory chewing,the range of stress concentration on denture base,implant and mucoperiosteum,and the maximum stress of the implant and peri-implant bone without metal reinforcement were significantly greater than those with metal reinforcement,and the maximum stress difference was between 0.59 MPa and 2.99 MPa.Conclusions Lingual metal-reinforced denture base can play a role in stress dispersion,or reduce the risk of bone resorption and denture base fracture to a certain extent.

关 键 词：覆盖义齿 种植体 义齿基托 有限元分析 

分 类 号：R318.01[医药卫生—生物医学工程]