临床口腔医学杂志2017，Vol.33Issue(3)：140-144,5.DOI:10.3969/j.issn.1003-1634.2017.03.005
偏唇类上颌中切牙三维有限元分析
Three dimensional finite element analysis of maxillary central incisors classified as buccal
摘要
Abstract
Objective:To observe the stress of distribution in three anatomical types of maxillary central incisor and provide reference for the determination of surgical site in immediate implant placement .Methods:CBCT image data were col-lected from patients which conform to the anatomical classification of 3 different natural maxillary central incisors .Mimics,3 matic,and Ansys software were used to establish three 3-D finite element models of maxillary central incisors and their sur-rounding alveolar bones .The simulated bite force was applied to the above models with a static load force at 5 angles of 0°, 30°,45°,60°,and 90°.The stress and displacement values at the 4 lines of the cementoenamel junction (CEJ)-apical labial, palatal,mesial,and distal on the periodontal ligament of the maxillary central incisor .Results:The equivalent stress on the periodontal ligament and the overall tooth displacement were increased with the angle enlargement ,and the equivalent stress and displacement at the four lines were also increased .The peaks of the equivalent stress at the 4 lines were shown at 0.4~2.3 mm below the CEJ,and each equivalent stress value generally decreased while approaching the apex .The displacements at the 4 lines were increased with angle enlargement ,the highest value reaching in the neck of the tooth which showing a steep decline within 6~7.5 mm below the CEJ ,and a gentle change from 8 mm to the apex .The effect of the four lines of type Ⅲ has the widest and highest peak value of 3 types of maxillary central incisor .Conclusion:For the 3 anatomical types of maxil-lary central incisor ,each equivalent stress was increased with angle enlargement .The peak values of the equivalent stress and the stress distribution of type Ⅲ were larger than other 2 types.By observing the stress of the root and the surrounding tissues of the maxillary central incisors under different loading conditions .关键词
上颌中切牙/即刻种植/应力/位移/三维有限元Key words
Maxillary central incisor/Immediate implant placement/Stress/Displacement/Three-dimensional finite element分类
医药卫生引用本文复制引用
李阳,孙蕾,林臻彦,万林子,徐多玲,林璇,高永波..偏唇类上颌中切牙三维有限元分析[J].临床口腔医学杂志,2017,33(3):140-144,5.基金项目
国家自然科学基金资助项目(31560265)国家科技部十三五规划重点专项子课题(2016YFC1102602)深圳市科技计划项目(JCYJ20160427100211076) （31560265）
