Effect of low-temperature aging on the mechanical behavior of ground Y-TZP

Journal of the Mechanical Behavior of Biomedical Materials
Gkr PereiraL F Valandro

Abstract

This study evaluated the effects of low-temperature aging on the surface topography, phase transformation, biaxial flexural strength, and structural reliability of a ground Y-TZP ceramic. Disc-shaped specimens were manufactured and divided according to two factors: "grinding" - without grinding (as-sintered, Ctrl), grinding with an extra-fine diamond bur (25 µm Xfine) and coarse diamond bur (181 µm Coarse); and "low-temperature-aging" (absence or presence). Grinding was performed using a contra-angle handpiece under water-cooling. Aging was performed in an autoclave at 134 °C, under 2 bar, over a period of 20 h. Surface topography analysis showed an increase in roughness based on grit-size (Coarse>Xfine>Ctrl), and aging promoted different effects on roughness (Ctrl Ag<Ctrl; Xfine Ag<Xfine; Coarse Ag>Coarse). Grinding and aging promoted an increase in the amount of m-phase, although different susceptibilities to degradation were observed. Weibull analysis showed an increase in characteristic strength after grinding (Coarse=Xfine>Ctrl); however, distinct effects were observed for aging (Ctrl<Ctrl Ag; Xfine=Xfine Ag; Coarse>Coarse Ag). Weibull moduli were statistically similar. Grinding promoted an increase in characteristic stren...Continue Reading

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Citations

Feb 2, 2016·Journal of the Mechanical Behavior of Biomedical Materials·G K R PereiraL F Valandro
Nov 23, 2015·Journal of the Mechanical Behavior of Biomedical Materials·G K R PereiraL F Valandro
Feb 28, 2016·Journal of the Mechanical Behavior of Biomedical Materials·G K R PereiraL F Valandro
Apr 5, 2016·Materials Science & Engineering. C, Materials for Biological Applications·G K R PereiraL F Valandro
Nov 5, 2016·Journal of the Mechanical Behavior of Biomedical Materials·L F GuilardiL F Valandro
Apr 7, 2017·Journal of Prosthodontics : Official Journal of the American College of Prosthodontists·Tutku Cakir-OmurYasemin Ozkan
May 10, 2018·Journal of Prosthodontics : Official Journal of the American College of Prosthodontists·Kan WongkamhaengIsabelle Denry
Nov 9, 2017·Brazilian Oral Research·Rodrigo Diniz PradoLuiz Felipe Valandro
Jun 14, 2018·Brazilian Oral Research·Gabriela NishiokaMelo Renata Marques de
Nov 1, 2018·Brazilian Oral Research·Amanda Maria de Oliveira Dal PivaRenata Marques de Melo
Sep 25, 2019·Journal of Materials Chemistry. B, Materials for Biology and Medicine·Lukas GritschAldo R Boccaccini
May 4, 2018·Brazilian Oral Research·Marina AmaralLuiz Felipe Valandro
Dec 6, 2018·Brazilian Dental Journal·Camila Pauleski ZucuniLuiz Felipe Valandro
Apr 11, 2020·Journal of Prosthodontics : Official Journal of the American College of Prosthodontists·Katerina Papageorgiou-KyranaEleana Kontonasaki
Dec 15, 2020·Journal of Applied Biomaterials & Functional Materials·Maria KelesiPetros Koidis
May 28, 2021·Journal of the Mechanical Behavior of Biomedical Materials·Julia GrambowMatthias Kern
Aug 23, 2021·Journal of the Mechanical Behavior of Biomedical Materials·Natália Almeida Bastos-BitencourtGrace Mendonca De Souza

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