The fracture evaluation of NiTi SMA endodontics files

Autor(es)

Tibério César Uchôa Matheus ; Hélio Pereira Lopes ^[2] ; Diana Santana de Albuquerque ^[3] ; Carlos Nelson Elias ^[4] ; Antônio Márcio Resende do Carmo ^[5] ; Jorge Otubo ^[6] ; Carlos Sérgio da Costa Viana

• Tipo de documento: Artigo Científico
• Fonte: MATERIALS RESEARCH-IBERO-AMERICAN JOURNAL OF MATERIALS; v. 10, n. 4, p. 395-398, 2007-12-00.

Resumo

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. (AU)

• Processo FAPESP: 00/09730-1 - Desenvolvimento de ligas de NiTi com efeito de memória de forma
• Beneficiário: Jorge Otubo
• Modalidade de apoio: Auxílio à Pesquisa - Jovens Pesquisadores