Structural, chemical and optical characterizations of an experimental SiO2-Y-TZP ceramic produced by the uniaxial/isostatic pressing technique

Victor Mosquim; Brunna Mota Ferrairo; Mariele Vertuan; Aroldo Geraldo Magdalena; Carlos Alberto Fortulan; Paulo Noronha Lisboa-Filho; Paulo Francisco Cesar; Estevam Augusto Bonfante; Heitor Marques Honório; Ana Flávia Sanches Borges

doi:10.1016/j.jmbbm.2020.103749

Structural, chemical and optical characterizations of an experimental SiO₂-Y-TZP ceramic produced by the uniaxial/isostatic pressing technique

J Mech Behav Biomed Mater. 2020 Jun:106:103749. doi: 10.1016/j.jmbbm.2020.103749. Epub 2020 Apr 1.

Affiliations

¹ Department of Operative Dentistry, Endodontics and Dental Materials, Bauru School of Dentistry, University of São Paulo, Bauru, SP, Brazil.
² Department of Prosthodontics and Periodontics, Bauru School of Dentistry, University of São Paulo, Bauru, SP, Brazil.
³ Department of Chemistry, UNESP-School of Science, São Paulo State University, Bauru, SP, Brazil.
⁴ Department of Mechanical Engineering, São Carlos School of Engineering, University of São Paulo, São Carlos, SP, Brazil.
⁵ Department of Physics, UNESP-School of Science, São Paulo State University, Bauru, SP, Brazil.
⁶ Department of Biomaterials and Oral Biology, School of Dentistry, University of São Paulo, São Paulo, SP, Brazil.
⁷ Department of Pediatric Dentistry, Orthodontics and Public Health, Bauru School of Dentistry, University of São Paulo, Bauru, SP, Brazil.
⁸ Department of Operative Dentistry, Endodontics and Dental Materials, Bauru School of Dentistry, University of São Paulo, Bauru, SP, Brazil. Electronic address: afborges@fob.usp.br.

PMID: 32250942
DOI: 10.1016/j.jmbbm.2020.103749

Abstract

This study aimed to produce a new SiO₂+Y-TZP ceramic via uniaxial/isostatic compression that was structurally and chemically characterized relating to its translucency and flexural strength. SiO₂ and Y-TZP were mixed using a ball mill, pressed and sintered at 1150 °C. The optical and mechanical properties of the specimens were compared to lithium disilicate (LD) and zirconia-reinforced lithium silicate (ZLS) (Kruskal-Wallis, α = 0.05). The Fourier Transform Infrared Spectroscopy bands suggested an interaction between Si, O and Zr. Contrast ratio and translucency parameter of the experimental ceramic were higher and lower, (p = 0.000001) respectively, than those of the LD and ZLS. The experimental ceramic presented similar flexural strength to ZLS, but lower than LD (p < 0.0001). It can be concluded that this processing method is efficient to obtain a SiO₂+Y-TZP ceramic and 1150 °C crystallizes SiO₂ without inducing t-m transformation. The SiO₂+Y-TZP ceramic presented lower translucency and higher masking ability than the commercially available glass-ceramics, but similar flexural strength to one glass-ceramics.

Keywords: Electron microscopy (B); SiO(2) (D); X-ray methods (B).

Publication types

Research Support, Non-U.S. Gov't

MeSH terms

Ceramics
Dental Porcelain
Materials Testing
Silicon Dioxide*
Surface Properties
Yttrium
Zirconium*

Substances

yttria stabilized tetragonal zirconia
Dental Porcelain
Yttrium
Silicon Dioxide
Zirconium