Effects of storage temperature on surface hardness, microstructure, and phase formation of white mineral trioxide aggregate

Journal of Endodontics
Mohammad Ali SaghiriAli Mohammad Saghiri

Abstract

Storage temperature influences the properties of Portland cement during mixing. Because of similarities between Portland cement and mineral trioxide aggregate, the aim of the present study was to evaluate surface microhardness, topography, and phase structure of white mineral trioxide aggregate (WMTA) after storage in a range of temperatures. Thirty WMTA sachets were divided into 3 groups of 10. The 3 groups were stored at 4 degrees C, 25 degrees C, and 40 degrees C for 48 hours with accompanying ampules. Sachets were immediately mixed after removal from storage according to manufacturer's instructions and mixed and packed into cylindrical glass tubes at room temperature. Surface microhardness of each specimen was measured after 3 days. Four specimens from each group were prepared and observed under scanning electron microscope and x-ray diffraction. Data were subjected to one-way analysis of variance and a post hoc Tukey test at P <.05. Mean surface hardness +/- standard deviation after storage at 4 degrees C, 25 degrees C, and 40 degrees C were 25.23 +/- 5.99, 53.56 +/- 3.28, and 62.89 +/- 1.76, respectively. Statistically significant differences were observed among the groups (P < .001). More voids and a disorganized, flake-...Continue Reading

References

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Jul 19, 2008·Journal of Endodontics·Saeed AsgarySanam Kheirieh
Sep 17, 2008·Journal of Endodontics·Mohammad Ali SaghiriBahram Ranjkesh
Jun 2, 2009·Journal of Endodontics·Irma Araceli Belío-ReyesEsther Cruz-Chavez
Feb 23, 2010·Journal of Endodontics·Micah L PorterIkuya Watanabe

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Citations

Sep 27, 2013·Microscopy and Microanalysis : the Official Journal of Microscopy Society of America, Microbeam Analysis Society, Microscopical Society of Canada·Mohammad Ali SaghiriMaryam Elyasi
Feb 26, 2014·Journal of Endodontics·Behnam BolhariPaul M H Dummer
Apr 21, 2012·Journal of Endodontics·Erick Y SatoChristine M Sedgley
Nov 5, 2011·Dental Traumatology : Official Publication of International Association for Dental Traumatology·Mohammad Ali SaghiriPayman Mehrvarzfar
Jun 23, 2015·Dental Traumatology : Official Publication of International Association for Dental Traumatology·Sevinç Aktemur Türker, Emel Uzunoğlu
Oct 4, 2013·BioMed Research International·Mohammad Ali SaghiriMayam Elyasi
Jan 19, 2012·Acta Odontologica Scandinavica·Mohammad Ali SaghiriAhmad Sheibaninia
Dec 11, 2014·Journal of Endodontics·Mohammad Ali SaghiriNader Sheibani
Jan 20, 2018·The Quarterly Journal of Experimental Psychology : QJEP·Avital Deutsch, Maya Dank
Apr 24, 2012·International Endodontic Journal·M A SaghiriF Garcia-Godoy

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