3种材质个性化一体化桩核改向修复上颌中切牙的三维有限元研究  

Three-dimensional Finite Element Analysis of Maxillary Central Incisors Restored with Three Kinds of Personalized Custom Post-and-core with Angles

作　　者：郭晓阳 陈志宇[1] 付艺璇 李绍萍 高毛毛 GUO Xiaoyang;CHEN Zhiyu;FU Yixuan;LI Shaoping;Gao Maomao(Department of Prosthodontics,Hebei Key Laboratory of Stomatology,Hebei Clinical Research Center for Oral Diseases,School and Hospital of Stomatology,Hebei Medical University,Shijiazhuang 050017,China)

机构地区：[1]河北医科大学口腔医学院·口腔医院修复科,河北省口腔医学重点实验室,河北省口腔疾病临床医学研究中心,河北石家庄050017

出　　处：《口腔医学研究》2022年第10期954-958,共5页Journal of Oral Science Research

基　　金：2019年度河北省老年病防治经费项目(编号:冀财预付[2019]761号);河北省“三三三人才工程”资助项目(编号:A202102010)。

摘　　要：目的:通过三维有限元分析的方法观察个性化一体化桩核改向修复不同角度倾斜的上颌中切牙后应力分布特征。方法:创建具有不同倾斜角度的上颌中切牙及改向修复的桩核-冠有限元模型。桩核材质采用铸造金钯合金,玻璃纤维增强树脂与碳纤维增强聚醚醚酮(CFR-PEEK),分析全瓷冠修复后不同模型在正中咬合接触受力下桩核、牙本质的等效应力分布情况。结果:改向角度相同时,金钯桩核应力最高,对应的牙本质应力最低;CFR-PEEK桩核应力最低,牙本质应力最高。同一材质改向修复时,桩核应力与牙本质应力随核向唇侧倾斜角度增大而减小。结论:固定载荷方向下,桩核角度的改变对修复体和牙体抗力影响并不显著;牙本质肩领完整时,建议选择低弹性模量桩核修复。Objective:To analyze the stress distribution characteristics of different materials custom post-and-core at different angles for maxillary central incisor by three-dimensional finite element analysis.Methods:The models with different inclination angles of post-and-core-and-crown in the maxillary central incisor were created.Three post-and-core materials were used in the model:cast gold-palladium alloy,glass fiber reinforced resin,and carbon fiber reinforced polyether ether ketone(CFR-PEEK).They were finally restored with an all-ceramic crown.The equivalent stresses in the post-and-core and dentin of the different models were analyzed under centric occlusion.Results:At the same angle,the highest stresses in the cast gold-palladium post-and-core correspond to the lowest stresses in the dentin.The CFR-PEEK post-and-core exhibited the lowest equivalent stress,corresponding to the highest stress in dentin.The stress of post-and-core and dentin decreases with increasing buccal angle for the same material.Conclusion:The angle of the post-and-core had no significant effect on restoration and dentin resistance under the same loading direction.The post-and-core with a lower elastic modulus is recommended when the dentin ferrule is intact.

关 键 词：三维有限元 一体化桩核 应力分布 上颌中切牙 

分 类 号：R783[医药卫生—口腔医学]