临床口腔医学杂志2013，Vol.29Issue(2)：92-94,3.DOI:10.3969/j.issn.1003-1634.2013.02.012
不同根管预备方法对根管壁应力分布的影响
The effect on the stress distribution of root canal wall by different root canal preparation methods.
摘要
Abstract
Objective: The main purpose of this study was to analyze the effect of different canal preparation techniques on the root canal stress values, and to explore the affect of different canal preparation techniques on the resistance of the root from a biomechanical viewpoint. Method: A total of 30 exacted human dental mandibular single canal premolar were randomly allocated into three groups (n=10) : Group 1, Standardized system using rotary Ni-Ti Mtwo instrument; Group2, Crown-down technique using rotary Ni-Ti Protaper instrument; Group3, step-back technique using conventional stainless steelK-files.Using technologies and Abaqus 6.10 software, they established finite element models of each group and tested root canal stress under central vertical loading conditions. Result: In all experimental groups; the average stress level of the remaining dentin after root canal preparation and filling were slightly different. There were statistically significant differences in G1,G3 andG2,G3 (P <0.05) , but there were no statistically significant differences between G1 and G2. Conclusion: In each experimental group average Von mises stress peak were much less than the limits of dentin compressive strength. These three common root canal preparation were safe and feasible. Protaper and Mtwo nickel titaniums maked the distribution of root canal stress more balanced, significantly reducing the stress concentration.So we recommended the use of Protaper and Mtwo nickel titaniums for root canal preparation to prevent the occurrence of vertical root fracture.关键词
三维有限元/应力/根管预备/镍钛器械Key words
three-dimension Finite Element Method/ stress/ root canal preparation/ nickel-titanium分类
医药卫生引用本文复制引用
石晓婷,尹新芹,林志勇,孟德廷,孙晓东,孙哲..不同根管预备方法对根管壁应力分布的影响[J].临床口腔医学杂志,2013,29(2):92-94,3.基金项目
山东省科技发展计划项目(2006GGB14001) （2006GGB14001）
