不同全瓷材料修复种植体支持单冠的应力分析  

Stress Analysis of Implant-supported Single Crown Restored with Different All-ceramic Materials

作　　者：李智勇[1] 李雅琼[2] 潘新华[2] 郭进新[3] 

机构地区：[1]武汉大学口腔医学院口腔生物医学工程教育部重点实验室,武汉430079 [2]武汉大学口腔医学院技工所,武汉430079 [3]武汉大学口腔医学院修复科,武汉430079

出　　处：《武汉理工大学学报》2010年第23期27-30,共4页Journal of Wuhan University of Technology

基　　金："十一五"国家科技支撑计划(2007BAI18B05)

摘　　要：用COSMOSM 2.85软件包建立了种植体支持的上颌中切牙三维有限元模型,观察在斜向加载时全瓷冠、全瓷基台和种植体周围骨组织内部的应力情况。全瓷基台设计为Procera氧化锆,全瓷冠分别选用Procera,In-ceram,IPSEmpress 2和Cercon等全瓷材料进行修复。研究表明：不同全瓷材料修复时全瓷冠、全瓷基台和种植体周围骨组织内部的应力分布相似。全瓷冠内部的应力集中在近远中颈部区域,全瓷基台内部的应力集中在腭侧种植体-基台连接处和基台-冠连接处,种植体周围骨组织内部的应力集中在唇侧颈部皮质骨。全瓷冠内部最大张应力在Procera氧化铝修复时最大,比IPS Empress 2修复时高约34%。全瓷基台和骨组织内部的最大应力在不同全瓷修复时差异不大,最大和最小值相差在4%~9%。In this paper,a 3-D finite element model of an implant-supported single crwon for maxillary central incisor was computed by COSMOSM 2.85.The stresses within the all-ceramic crown,abutment and peri-implant bone were observed under oblique loading.The materials used for abutment was Procera zirconia and for crown was Procera,In-ceram,IPS Empress 2 and Cercon,respectively.The results shown that the stress distribution within the all-ceramic crown,abutment and peri-implant bone was similar when different all-ceramic materials were used.Within the all-ceramic crown the stress was concentrated near the neck of crown in the misal and distal side,within the abutment was at the implant-abutment junction and implant-crown junction and within the peri-implant bone was near the neck of cortical bone.The maximum tensile stress within the all-ceramic crown was highest when Procera alumina was used,which was 34% higher than that of IPS Empress 2.The difference of the maximum stress within the abutment and peri-implant bone was not significant.

关 键 词：种植体 全瓷材料 应力分析 三维有限元模型 

分 类 号：R783.4[医药卫生—口腔医学]