Effect of heat treatments on Ni-Ti endodontic files

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4 Citations (Scopus)


Three brands of rotary nickel-titanium endodontic instruments with some comparable geometric features but with different crosssection (similar tip size and same taper of.04) were selected for this study: MTwo.04(35) (VDW GmbH, Germany), K3.04(30) (SybronEndo, Mexico) and K3XF.04(30) (SybronEndo, Mexico). K3XF is made from novel R-phase heat-treated metal alloy while all other files were made from traditional Ni-Ti alloy. The instruments were analysed under the following conditions: i) as received (AR), ii) heat treated at 350 degrees C, iii) heat treated at 400 degrees C. The transformation temperatures were determined by differential scanning calorimeter (DSC). Compared to conventionally K3 and MTwo files, R-phase heat treatment K3XF file showed higher transformation temperatures. These results also showed that heat treatments increase the transformation temperatures. (C) 2017 Portuguese Society of Materials (SPM). Published by Elsevier Espana, S.L.U. All rights reserved.
Original languageEnglish
Pages (from-to)E15-E18
JournalCiência e Tecnologia dos Materiais
Issue number1
Publication statusPublished - 2017


  • NiTi shape memory alloys
  • endodontic files
  • heat treatments
  • transformation temperatures


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