Structural, chemical and optical characterizations of an experimental SiO<sub>2</sub>-Y-TZP ceramic produced by the uniaxial/isostatic pressing technique.
basic_science · Level V
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- Record sourced from PubMed, PMID 32250942.
- Also identified by DOI 10.1016/j.jmbbm.2020.103749.
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Abstract
This study aimed to produce a new SiO<sub>2</sub>+Y-TZP ceramic via uniaxial/isostatic compression that was structurally and chemically characterized relating to its translucency and flexural strength. SiO<sub>2</sub> 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 SiO<sub>2</sub>+Y-TZP ceramic and 1150 °C crystallizes SiO<sub>2</sub> without inducing t-m transformation. The SiO<sub>2</sub>+Y-TZP ceramic presented lower translucency and higher masking ability than the commercially available glass-ceramics, but similar flexural strength to one glass-ceramics.
Medical subject headings
- Silicon Dioxide
- Zirconium