The fracture evaluation of NiTi SMA endodontics files

Materials Research

Tibério César Uchôa Matheus²  Hélio Pereira Lopes¹  Diana Santana De Albuquerque¹  Carlos Nelson Elias¹  Antônio Márcio Resende Do Carmo¹  Jorge Otubo²  Carlos Sérgio Da Costa Viana¹ 

[1] ,Instituto Tecnológico de Aeronáutica Divisão de Engenharia Mecânica Aeronáutica São José dos Campos SP ,Brazil

关键词: endodontics files;    NiTi;    SMA;    torsion fracture;   

DOI  :  10.1590/S1516-14392007000400012

来源: SciELO

【 摘 要 】

The purpose of this study was to evaluate the fracture resistance and the fracture surface of NiTi SMA engine-driven endodontics files submitted to clockwise torsion. The maximum angular deflection and the maximum torque were analyzed without axial loading. The helical plastic deformations and the fracture surface morphology were evaluated by Scanning Electron Microscopic. The results showed that there was a significant statistical difference in the maximum fracture torque and no statistical difference for the angular deflection for the analyzed files. In relation to the maximum torque at the instant of the fracture, one of the brand presented better performance than the other. According to Scanning Electron Microscopic evaluation, all the files showed ductile fracture morphology.

【 授权许可】

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