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Type: Artigo
Title: TiO2 nanotubes improve physico-mechanical properties of glass ionomer cement
Author: Kantovitz, K.R.
Fernandes, F.P.
Feitosa, I.V.
Lazzarini, M.O.
Denucci, G.C.
Gomes, O.P.
Giovani, P.A.
Moreira, K.M.S.
Pecorari, V.G.A.
Borges, A.F.S.
Nociti Junior, F.H.
Basting, R.T.
Lisboa-Filho, P.N.
Puppin-Rontani, R.M.
Abstract: The aim of this study was to determine the physico-mechanical properties of a high viscosity glass ionomer cement (GIC) reinforced with TiO2 nanotubes (TiO2-nt). Methods: TiO2-nt was incorporated into the GIC powder components (Ketac Molar EasyMix™) in concentrations of 0% (control group), 3%, 5%, 7% by weight. Compressive strength (n = 10/group), three point bending for flexural strength (n = 18/group), microshear bond strength to dentin and failure mode (n = 20/group), and surface roughness and weight loss before and after brushing simulation (30,000 cycles) (n = 8/group) were evaluated. Data were submitted to Shapiro-Wilk, ANOVA, Tukey and Chi-square tests (α ≤ 0.05). Results: Addition of 5% of TiO2-nt into GIC presented the highest values for compressive strength and differed from the control, 3% and 7% groups (p = 0.023). There were no significant differences in flexural strength (p = 0.107) and surface roughness before and after the dental brushing (p = 0.287) among the groups. GIC added with 5% TiO2-nt showed the lowest weight loss values (p = 0.01), whereas the control, 3% or 5% TiO2-nt groups presented similar microshear bond strength values (p ≥ 0.05). The 5% TiO2-nt group featured higher microshear bond strength than the 7% TiO2-nt group (p = 0.034). Cohesive in material was the most representative failure mode for all groups. Significance: The incorporation of TiO2-nt did not affect GIC's adhesiveness to dentin, but improved its compressive strength at 5%. Furthermore, TiO2-nt decreased the percentage of weight loss after GIC's surface wear
Subject: Cimentos de ionômeros de vidro
Country: Inglaterra
Editor: Elsevier
Rights: Fechado
Identifier DOI: 10.1016/
Date Issue: 2020
Appears in Collections:FOP - Artigos e Outros Documentos

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