口腔疾病防治2017，Vol.25Issue(9)：569-574,6.DOI:10.12016/j.issn.2096-1456.2017.09.005
不同设计新型钛合金根管桩修复下颌前磨牙残根的三维有限元分析
Three-dimensional finite element analysis of different designs of residual posterior root restored with a new ti-tanium alloy post
摘要
Abstract
Objective To compare the stress distribution of residual posterior root restored with a new titanium al-loy post of different diameter and taper, and discuss the rational design of posterior tooth post by the three-dimensional finite element method. Methods Mandibular second premolar image data was obtained by CBCT, and the mandibular second premolar post models with different diameter and taper were established with the help of Mimics data conver-sion, Geomagic Studio image processing technology and Creo/Parametric software. Then Abaqus was used to simulate the load condition of prosthesis and analyze the Von Mises stress of the cervical and apical regions. Results With the same diameter, the influence of the different post tapers on the peak stress of the root cervical area was irregular. When the taper was the same, the peak stress of the root apex area decreased firstly and then increased as the diameter in-creased. When the diameter was 1 mm, the peak stress of the root cervical and apex area was the lowest. Conclusion The effect of diameter on the stress distribution of dentin is more important than that of taper. To select the reasonable diameter and taper of the post is helpful to reduce the peak stress of the root cervical and apex area.关键词
根管桩/锥度/直径/应力分析/有限元方法Key words
Post/Taper/Diameter/Stress analysis/Finite element method分类
医药卫生引用本文复制引用
王林霞,苏畅,王茂夏,孟玉坤..不同设计新型钛合金根管桩修复下颌前磨牙残根的三维有限元分析[J].口腔疾病防治,2017,25(9):569-574,6.基金项目
成都市惠民工程项目(2013惠民工程-13) （2013惠民工程-13）
