Author(s):
Kantovitz, Kamila Rosamilia ; Fernandes, Fernando Pelegrim ; Feitosa, Isabella Vidal ; Lazzarini, Marcela Oliveira ; Denucci, Giovanna Corrêa ; Gomes, Orisson Ponce [UNESP] ; Giovani, Priscila Alves ; Moreira, Kelly Maria Silva ; Pecorari, Vanessa Gallego Arias ; Borges, Ana Flávia Sanches ; Nociti, Francisco Humberto ; Basting, Roberta Tarkany ; Lisboa-Filho, Paulo Noronha [UNESP] ; Puppin-Rontani, Regina Maria
Date: 2020
Persistent ID: http://hdl.handle.net/11449/200018
Origin: Oasisbr
Subject(s): Glass ionomer cements; Mechanical properties; Nanotechnology; Titanium; Glass ionomer cements; Glass ionomer cements; Mechanical properties; Mechanical properties; Nanotechnology; Nanotechnology; Titanium; Titanium
Description
Made available in DSpace on 2020-12-12T01:55:22Z (GMT). No. of bitstreams: 0 Previous issue date: 2020-03-01
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™) 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.
Faculdade São Leopoldo Mandic - SLMANDIC Campinas
Department of Pediatric Dentistry Piracicaba Dental School University of Campinas, Piracicaba - UNICAMP
Department of Physics School of Science São Paulo State University - UNESP, Bauru
Department of Biostatistics Dental School São Paulo University - UNIP
Department of Dentistry Endodontic and Dental Materials Bauru Dental School University of São Paulo - USP, Bauru
Department of Prosthodontics and Periodontics Division of Periodontics Piracicaba Dental School University of Campinas - UNICAMP, Piracicaba
Department of Physics School of Science São Paulo State University - UNESP, Bauru
