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A three-dimensional finite element analysis of 0.02 taper 20# stainless steel K files during root canal instrumentation
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- Author:
- No author available
- Journal Title:
- CHINESE JOURNAL OF STOMATOLOGY
- Issue:
- 6
- DOI:
- 10.3760/j.issn:1002-0098.2007.06.008
- Key Word:
- 不锈钢;根管制备;应力,物理
Abstract： 目的 分析不锈钢K型根管锉(简称:不锈钢K锉)在弯曲和扭转条件下的应力变化规律.方法 运用ANSYS 9.0三维有限元分析软件构建不锈钢K锉的三维有限元模型,计算其在弯曲和扭转条件下的应力分布.结果 ①建立了0.02锥度20号不锈钢K锉的三维有限元模型;②在弯曲条件相同的情况下,不锈钢K锉切割刃与根管壁呈点接触或顺螺纹扭转时的应力集中于刃口,边接触或逆螺纹扭转时的应力集中于切割刃之间的沟槽中;③在相同弯曲角度和半径条件下,点接触比边接触时根管锉产生的应力值更大;在约束点远离加力位点的扭转力矩作用下产生的拉、压应力值较大.结论 最大应力随器械运动方式的变化而变化,最大拉应力值产生在器械表面.
- [1]赵志业.金属塑性变形与轧制理论[M].1985.
- [2]王振宁,巴新华,李达敏,等.金属材料的残余应力对力学试验的影响[J].1996,(2).
- [3]Carnes DL Jr,Pruett JP,Clement DJ.Cyclic fatigue testing of nickel-titanium endodontic instruments.[J].1997,23(2).
- [4]J B, Roane,C, Sabala.Clockwise or counterclockwise.[J].1984,10(8).
- [5]Parashos P,Messer HH.Factors Influencing Defects of Rotary Nickel-Titanium Endodontic Instruments After Clinical Use.[J].2004,30(10).
- [6]J Y, Blum,P, Machtou,J P, Micallef.Location of contact areas on rotary Profile instruments in relationship to the forces developed during mechanical preparation on extracted teeth.[J].1999,32.
- [7]Berutti E,Gaviglio I,Ibba A,etc.Comparative analysis of torsional and bending stresses in two mathematical models of nickel-titanium rotary instruments: ProTaper versus ProFile.[J].2003,29(1).
- [8]Zheng Y,Eng D,Xu X,etc.Comparative study of torsional and bending properties for six models of nickel-titanium root canal instruments with different cross-sections.[J].2006,32(4).
- [9]L B, Chernick,J J, Jacobs,E P, Lautenschlager,etc.Torsional failure of endodontic files.[J].1976,2(4).