Development of Y-TZP/MWCNT-SiO2 nanocomposite for dental protheses

da Silva LH, Rinaldi LA, Lazar DRR, Ussui V, Tango RN, Belli R, Lohbauer U, Cesar PF (2023)

Publication Type: Journal article

Publication year: 2023

Journal

Journal of the Mechanical Behavior of Biomedical Materials Elsevier

Book Volume: 143

Article Number: 105888

DOI: 10.1016/j.jmbbm.2023.105888

Abstract

Y-TZP/MWCNT-SiO2 nanocomposite was synthesized by co-precipitation and hydrothermal treatment methods. After the characterization of the MWCNT-SiO2 powder, specimens were obtained from the synthesized material Y-TZP/MWCNT-SiO2 by uniaxial pressing for a second characterization and later comparison of its optical and mechanical properties with the conventional Y-TZP. The MWCNT-SiO2 was presented in bundles of carbon nanotubes coated by silica (mean length: 5.10 ± 1.34 μm /D90: 6.9 μm). The composite manufactured was opaque (contrast ratio: 0.9929 ± 0.0012) and had a white color with a slightly difference from the conventional Y-TZP (ΔE00: 4.4 ± 2.2) color. The mechanical properties of Y-TZP/MWCNT-SiO2: vickers hardness (10.14 ± 1.27 GPa; p = 0.25) and fracture toughness (4.98 ± 0.30 MPa m^1/2; p = 0.39), showed no significant difference from the conventional Y-TZP (hardness: 8.87 ± 0.89; fracture toughness: 4.98 ± 0.30 MPa m^1/2). However, for flexural strength (p = 0.003), a lower value was obtained for Y-TZP/MWCNT-SiO2 (299.4 ± 30.5 MPa) when compared to the control Y-TZP (623.7 ± 108.8 MPa). The manufactured Y-TZP/MWCNT-SiO2 composite presented satisfactory optical properties, however the co-precipitation and hydrothermal treatment methods need to be optimized to avoid the formation of porosities and strong agglomerates, both from Y-TZP particles and MWCNT-SiO2 bundles, which lead to a significant decrease in the material flexural strength.

Authors with CRIS profile

Renan Belli Department of Operative Dentistry and Periodontology Ulrich Lohbauer Medizinische Fakultät

Involved external institutions

University of São Paulo / Universidade de São Paulo (USP)

Brazil (BR) Nuclear Energy Research Institute / Instituto de Pesquisas Energéticas e Nucleares (IPEN)

Brazil (BR) São Paulo State University / Universidade Estadual Paulista "Júlio de Mesquita Filho" (UNESP)

Brazil (BR)

How to cite

APA:

da Silva, L.H., Rinaldi, L.A., Lazar, D.R.R., Ussui, V., Tango, R.N., Belli, R.,... Cesar, P.F. (2023). Development of Y-TZP/MWCNT-SiO2 nanocomposite for dental protheses. Journal of the Mechanical Behavior of Biomedical Materials, 143. https://doi.org/10.1016/j.jmbbm.2023.105888

MLA:

da Silva, Lucas Hian, et al. "Development of Y-TZP/MWCNT-SiO2 nanocomposite for dental protheses." Journal of the Mechanical Behavior of Biomedical Materials 143 (2023).

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