Development and characterization of experimental ZnO cement containing niobophosphate bioactive glass as filling temporary material.

Autor:	Ferreira PVC; Piracicaba Dental School, Department of Restorative Dentistry, University of Campinas (UNICAMP), Limeira Av. 901, Piracicaba, São Paulo, Brazil., Abuna GF; General Dentistry Department, Division of Biomedical Materials, East Carolina University School of Dental Medicine, Greenville, NC, USA., Oliveira BEC; Department of Restorative Dentistry, School of Dentistry, University Ceuma (UNICEUMA), Josué Montello, 01, Renascença II, 65075120 São Luis, Maranhão, Brazil., Consani S; Piracicaba Dental School, Department of Restorative Dentistry, University of Campinas (UNICAMP), Limeira Av. 901, Piracicaba, São Paulo, Brazil., Sinhoreti M; Piracicaba Dental School, Department of Restorative Dentistry, University of Campinas (UNICAMP), Limeira Av. 901, Piracicaba, São Paulo, Brazil., Carvalho CN; Department of Restorative Dentistry, School of Dentistry, University Ceuma (UNICEUMA), Josué Montello, 01, Renascença II, 65075120 São Luis, Maranhão, Brazil., Bauer J; School of Dentistry, Discipline of Dental Materials, University Federal of Maranhão (UFMA), Campus Universitário do Bacanga, Av. dos Portugueses, 65085680 São Luis, MA, Brazil.
Jazyk:	angličtina
Zdroj:	The Saudi dental journal [Saudi Dent J] 2021 Dec; Vol. 33 (8), pp. 1111-1118. Date of Electronic Publication: 2021 Mar 26.
DOI:	10.1016/j.sdentj.2021.03.009
Abstrakt:	Aims: The aim of this study was to develop and characterize a temporary restorative material based on a zinc oxide matrix containing niobophosphate bioactive glass (NbG) for the caries-affected dentin treatment. Material and Methods: NbG was added to a ZnO 2 matrix in different concentrations (wt%). EDS-SEM, ATR-FTIR and XRD analyses were performed to characterize the cement. Calcium release was evaluated in TRIS solution after 1, 7 and 14 days by colorimetric method (A 650 ). Compressive strengths and setting times were performed to analyze mechanical properties. Results: EDS spectra confirmed the presence of Ca, P and Nb in the groups containing NbG. EDS mapping exhibit the ZnO 2 homogeneous distribution, and NbG immersed in this matrix. Peaks suggesting interaction between matrix and NbG were not detected in Ftir spectra. Calcium releasing showed to be time-dependent for experimental groups containing 10, 20, 30 and 40%. The NbG incorporation progressively increased the compressive strength values in the experimental groups. NbG incorporation seemed to influence the ZnO 2 matrix early setting reaction. No statistical difference was observed in the final setting time. Conclusion: The addition of NbG particles into zinc oxide matrix could work as a mechanical reinforcement. It is suggested that the calcium released by the cement containing at least 10% NbG could induce apatite formation. Competing Interests: The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper. (© 2021 The Authors.)
Databáze:	MEDLINE
Externí odkaz: