不同全瓷材料和厚度的种植牙冠应力分布有限元分析  

Finite element analysis of the stress distribution of dental implant crowns with different all⁃ceramic materials and thicknesses

作　　者：李杰森 林珍香[2] 吴东[1] 郑志强[1] 林捷[1] LI Jiesen;LIN Zhenxiang;WU Dong;ZHENG Zhiqiang;LIN Jie(Department of VIP Den-tal Service,School and Hospital of Stomatology,Fujian Medical University,Fuzhou 350002,China;Department of Stomatology,Hospital of Fujian Provincial Authorities,Fuzhou 350001,China)

机构地区：[1]福建医科大学附属口腔医院特诊科,福建福州350002 [2]福建省级机关医院口腔科,福建福州350001

出　　处：《口腔疾病防治》2021年第3期166-170,共5页Journal of Prevention and Treatment for Stomatological Diseases

基　　金：福建省科技创新联合资金项目(2017Y9095)。

摘　　要：目的通过有限元方法比较不同全瓷材料和厚度在种植牙冠修复的应力分布情况,为临床冠部修复材料的选择和设计提供参考。方法建立下颌第一磨牙种植牙冠修复有限元模型,并进行6种冠厚度和4种不同冠修复材料,即树脂基陶瓷(Lava Ultimate和Vita Enamic)、二硅酸锂玻璃陶瓷(IPS e.max CAD)和氧化锆陶瓷(Cercon)进行组合。在下颌第一磨牙面加载600 N,使用有限元软件ANSYS 10.0分析应力分布。结果冠部应力分析显示,4 mm⁃Cercon组156.05 MPa最高,1 mm⁃Lava Ultimate组18.85 MPa最低。树脂水门汀应力分析显示,4 mm⁃Lava Ultimate组62.52 MPa最高,1 mm⁃IPS e.max CAD组16.74 MPa最低。使用成品基台时,Lava Ultimate组在冠修复体、树脂水门汀中的应力集中较相同冠厚度的个性化基台高。结论随着冠厚度增加,冠修复体和树脂水门汀中的最大主应力集中呈现上升趋势;树脂基陶瓷使用个性化基台更有利于减少应力集中。Objective To compare the stress distribution of different all⁃ceramic restoration materials and thick⁃nesses in dental crown restorations using the finite element method and provide a reference for the selection and design of clinical crown restoration materials.Methods A finite element model of mandibular first molar implant crown resto⁃ration was created,and 6 crown thickness designs and 4 different crown restoration materials were evaluated,namely,resin⁃based ceramics(Lava Ultimate and Vita Enamic),lithium disilicate glass⁃ceramics(IPS e.max CAD),and zirconia ceramic(Cercon)designs.The mandibular first molars were loaded at 600 N,and the stress distribution was analyzed by using the finite element software ANSYS 10.0.Results The crown stress analysis showed that 156.05 MPa was the highest in 4 mm Cercon group and 18.85 MPa was the lowest in 1 mm Lava Ultimate group.The stress analysis of resin cement showed that 62.52 MPa was the highest in the 4 mm Lava Ultimate group and 16.74 MPa was the lowest in 1 mm IPS e.max CAD group.During the use of the finished platform,the stress concentration of the Lava Ultimate group in the crown prosthesis and resin cement was higher than that of the personalized platform with the same crown thick⁃ness.Conclusion With increasing crown thickness,the maximum principal stress concentration in crown restoration and resin cement increases.Personalized abutments are more conducive to reducing stress concentrations for resin⁃based ceramics.

关 键 词：树脂基陶瓷 氧化锆 冠修复体厚度 树脂水门汀 种植牙 有限元 应力分布 基台设计 个性化基台 

分 类 号：R78[医药卫生—口腔医学]