有限元法分析不同桩核材料对全瓷冠应力分布规律的影响  

3-D Finite element analysis of All-ceramic crown stress distribution subjected to various Post-and-core applications

作　　者：李冰[1] 刘斐[1] 张并生[1] 武秀萍[1] 

机构地区：[1]山西医科大学口腔医院修复科,山西太原03001

出　　处：《临床口腔医学杂志》2013年第9期548-550,共3页Journal of Clinical Stomatology

基　　金：山西医科大学青年基金(02200721)

摘　　要：目的:探讨不同桩核材料对全瓷冠应力分布规律的影响,为临床修复设计提供依据。方法:利用螺旋CT断层图像,构建上颌第一磨牙舌侧1/2缺损桩核及全瓷冠修复的有限元分析模型,设计垂直集中载荷600N的加载方式,利用ANSYS软件分析全瓷冠的最大张应力和von mises应力值。结果:全瓷冠的von mises应力和最大张应力均集中于载荷加载部位,并呈放射状向周围递减,von mises应力的集中区域向颊侧方向延伸。结论:桩核材料弹性模量不同对全瓷冠的应力分布影响较大,临床上应根据牙体缺损情况选择桩核材料。Objective： To investigate the relationship between the different teeth post and core materials and stress distribution of all-ceramic crown and provide the basis for the design of clinical repair. Method： The fault images of spiral CT were used to construct the finite element analysis model of l / 2 defect in lingual side of maxillary first molar and all- ceramic crown, and load way was designed： 600 N load was vertieally concentrated, and ANSYS software was used to analyze the stress values of all-ceramic crown and dentin. Result：The von raises stress of all-ceramic crown and maximum tensile stress loads are concentrated on the loading area and was decreased progressively and radially towards surrounding. Con- clusion： Because different teeth post and core materials can affect the stress distribution of all-ceramic crown significantly. In clinic, the suitable teeth post and nuclear materials were chosen according to dental defect of patients.

关 键 词：桩核材料 全瓷冠 有限元分析 

分 类 号：R783.3[医药卫生—口腔医学] O242.21[医药卫生—临床医学]