Effects of multiple firings on the mechanical properties and microstructure of veneering ceramics for zirconia frameworks

Journal of Dentistry
Xuehua TangHirofumi Yatani

Abstract

The purpose of this study is to evaluate the effects of multiple firings on the mechanical properties and microstructure of veneering ceramics used with zirconia frameworks. Five different veneering ceramics for zirconia frameworks were used: Vintage ZR (ZR), Cerabien ZR (CZR), Vita VM9 (VM9), Cercon ceram KISS (KISS), IPS e.max ceram (e.max), and one veneering ceramic used for PFM frameworks: Vintage MP (MP). Twenty specimens were fabricated of each veneering ceramic. Ten specimens were fired twice and another ten specimens were fired ten times. Three-point flexural strength following the ISO 6872 and Vickers hardness were measured, and fracture toughness (K(IC)) was calculated. Density and porosity were determined. Specimens were characterized using X-ray diffraction (XRD) and scanning electron microscopy (SEM). For all materials, density increased and porosity decreased after 10 firings. Significant differences in density and porosity were observed between 2 and 10 firings, with the exception of VM9 (P<0.05). There were no significant differences in flexural strength between 2 and 10 firings except for MP. The Vickers hardness of ZR, VM9, KISS and MP increased significantly after 10 firings (P<0.001). There were no significa...Continue Reading

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Citations

Dec 18, 2013·International Journal of Oral Science·Rao-Rao WangDong-Sheng Zhang
Jul 13, 2014·Journal of Dentistry·Josephine F Esquivel-UpshawKenneth J Anusavice
Nov 28, 2015·The Journal of the American Dental Association·Tariq F Alghazzawi, Gregg M Janowski
Jul 31, 2012·Journal of Dentistry·Xuehua TangHirofumi Yatani
May 27, 2015·Dental Materials : Official Publication of the Academy of Dental Materials·A VichiM Ferrari
Oct 10, 2014·Journal of the Mechanical Behavior of Biomedical Materials·Xuehua TangHirofumi Yatani
Aug 23, 2016·Dental Materials Journal·Tonino TrainiSergio Caputi
Oct 12, 2016·Dental Materials Journal·Murat AlkurtMustafa Gundogdu
Oct 7, 2016·Dental Materials : Official Publication of the Academy of Dental Materials·P D MeirellesP Benetti
Mar 20, 2018·Journal of Materials Science. Materials in Medicine·Satoshi SakodaIkuya Watanabe
Sep 4, 2020·The Journal of Advanced Prosthodontics·Ece İrem OğuzSadullah Üçtaşlı
Dec 16, 2020·Journal of Prosthodontics : Official Journal of the American College of Prosthodontists·Dayana Campanelli de MoraisRenata Marques de Melo Marinho
Aug 12, 2019·Dental Materials : Official Publication of the Academy of Dental Materials·Carina B TanakaJamie J Kruzic

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