TiO2 nanotubes improve physico-mechanical properties of glass ionomer cement

Author(s):Show less -

Kantovitz, Kamila Rosamilia ^{[1, 2, 3]} ; Fernandes, Fernando Pelegrim ^{[2, 3]} ; Feitosa, Isabella Vidal ^{[2, 3]} ; Lazzarini, Marcela Oliveira ^{[1, 4]} ; Denucci, Giovanna Correa ^{[2, 3]} ; Gomes, Orisson Ponce ^{[5, 6]} ; Giovani, Priscila Alves ^{[1, 4]} ; Silva Moreira, Kelly Maria ^{[1, 4]} ; Arias Pecorari, Vanessa Gallego ^{[7, 8]} ; Sanches Borges, Ana Flavia ^{[9, 10]} ; Nociti Jr, Francisco Humberto ; Basting, Roberta Tarkany ^{[2, 3]} ; Lisboa-Filho, Paulo Noronha ^{[5, 6]} ; Puppin-Rontani, Regina Maria ^{[1, 3]}

Affiliation

^[1] Univ Estadual Campinas, Dept Pediat Dent, Piracicaba Dent Sch, UNICAMP, Piracicaba, SP - Brazil

^[2] Fac Sao Leopoldo Mand SLMANDIC, Campinas, SP - Brazil

^[3] Fac Sao Leopoldo Mandic, Dent Res Ctr, Dent Mat Area, Rua Jose Rocha Junqueira 13, BR-13045755 Campinas, SP - Brazil

^[4] Univ Estadual Campinas, Piracicaba Dent Sch, UNICAMP, FOP, Dent Mat Div, Av Limeira 901, BR-13414903 Piracicaba, SP - Brazil

^[5] Sao Paulo State Univ UNESP, Sch Sci, Dept Phys, Bauru, SP - Brazil

^[6] State Univ Sao Paulo UNESP, Sch Sci, Nucleo Res Pres Geisel, Av Engn Luis Edmundo Carrijo Coube 2085, BR-17033360 Bauru, SP - Brazil

^[7] Sao Paulo Univ UNIP, Dent Sch, Dept Biostat, Sao Paulo - Brazil

^[8] Sao Paulo Univ UNIP, R Francisco Bautista 1315, BR-04182020 Sao Paulo, SP - Brazil

^[9] Univ Sao Paulo, Bauru Dent Sch, Dept Dent Endodont & Dent Mat, Bauru, SP - Brazil

^[10] Univ Sao Paulo USP Bauru, Alameda Dr Octavio Pinheiro Brisolla 9-75, BR-17012901 Bauru, SP - Brazil

• Document type: Journal article
• Source: Dental Materials; v. 36, n. 3, p. E85-E92, MAR 2020.
• Web of Science Citations: 0

Abstract

Objectives. 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 (TM)) 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 (alpha <= 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 GICs surface wear. (C) 2020 The Academy of Dental Materials. Published by Elsevier Inc. All rights reserved. (AU)

• FAPESP's process: 16/13786-0 - Effect of Novel Nanotechnology to Conventional Glass Ionomer Cement on its Physical-Chemical-Biological Properties
• Grantee: Kamila Rosamilia Kantovitz
• Support Opportunities: Regular Research Grants
• FAPESP's process: 17/03005-4 - Incorporation of titanium dioxide nanotubes (TiO2) to conventional glass ionomer cement: wear and roughness surface evaluations
• Grantee: Marcela Oliveira Lazzarini
• Support Opportunities: Scholarships in Brazil - Scientific Initiation