3D打印纤维桩修复不同形态根管的有限元分析  

Three-dimensional Finite Element Analysis of Different Root Canals Restored with 3D Printing Fiber Post

作　　者：肖燕[1] 沈凯奇 

机构地区：[1]郑州大学第一附属医院口腔科

出　　处：《口腔医学研究》2017年第3期273-277,共5页Journal of Oral Science Research

基　　金：国家青年自然科学基金项目(编号:81400492)

摘　　要：目的:利用三维有限元分析方法研究基于3D打印技术定制不同根管形态桩核冠修复后牙齿各部分应力分布状况,为其在临床的修复应用提供理论依据。方法:利用Micro-CT扫描技术并结合逆向工程软件Mimics及模型修复软件Magics获得上颌尖牙的模型,应用UG中CAE的Nastran模块进行三维有限元应力分析。结果:对于正常形态根管,3D打印个性化桩核系统的桩应力分布优于预成纤维桩系统,能够有效降低粘合剂的失效概率;对于漏斗形态根管,3D打印个性化桩核系统修复后牙根应力分布明显优于预成纤维桩系统,能够有效提高牙齿的抗折性。结论:无论正常形态根管还是漏斗型根管,3D打印个性化桩核对牙体的修复效果均优于预成桩核系统。Objective：To investigate the effect of different maxillary canine root canals on the stress distribution of3 Dprinting post and core by three-dimensional finite element analysis.Methods：Micro-CT scan,reverse engineering software MIMICS,model reconstructing software MAGICS and Unigraphics（UG）software were employed to reconstruct the three-dimensional finite element models of maxillary canines.Results：For normal root canals,the stress distribution of 3Dprinting post and core system was better than that of prefabricated fiber post system by reducing the failure probability of bond.For funnel-shape root canals,the stress distribution of 3Dprinting post and core system was better than that of prefabricated fiber post system by increasing the fracture resistance of teeth.Conclusion：3Dprinting posts are better than pre fiber post system to restore the maxillary canine.

关 键 词：3D打印 桩核系统 个性化定制 应力分析 

分 类 号：R783.3[医药卫生—口腔医学]