Effect of bioactive glasses and neodymium:yttrium-aluminum-garnet laser on dentin permeability.

Autor:	Penha KJS; Department of Dentistry I, Federal University of Maranhão, São Luis, Maranhão, Brazil., Roma FRVO; Department of Dentistry I, Federal University of Maranhão, São Luis, Maranhão, Brazil., Torres CRG; Department of Restorative Dentistry, Institute of Science and Technology of São José dos Campos (UNESP) - São Paulo State University, SP, Brazil., Bauer JRO; Department of Dentistry I, Federal University of Maranhão, São Luis, Maranhão, Brazil., Firoozmand LM; Department of Dentistry I, Federal University of Maranhão, São Luis, Maranhão, Brazil.
Jazyk:	angličtina
Zdroj:	Journal of conservative dentistry : JCD [J Conserv Dent] 2020 Nov-Dec; Vol. 23 (6), pp. 583-588. Date of Electronic Publication: 2021 Feb 11.
DOI:	10.4103/JCD.JCD_453_20
Abstrakt:	Context: Dental hypersensitivity and loss of dental tissues are commonly observed in patients, and most of the problems are caused due to total or partial exposure of dentinal tubules. Aims: The purpose of this study is to evaluate the performance of 45S5 bioactive glass and niobophosphate (NbG) associated with neodymium: yttrium-aluminum-garnet (Nd:YAG) laser for the reduction of dentin permeability. Materials and Methods: Fifty bovine dentin discs were made and distributed randomly into five groups ( n = 10). The Nd:YAG laser was applied with the bioactive glasses using the energy parameters (60 and 80 mJ), forming the groups; NbG_60: NbG + Nd:YAG (60 mJ); NbG_80: NbG + Nd:YAG (80 mJ), 45S5_60: 45S5 + Nd:YAG (60 mJ); 45S5_80: 45S5 + Nd:YAG (80 mJ) and C: control (untreated dentin). The permeability was measured with a split chamber device. The samples were subjected to the erosive challenge and a new permeability measurement was done. Furthermore, the dentin was analyzed by scanning electron microscopy/energy-dispersive X-ray spectroscopy (SEM/EDS). Statistical Analysis Used: The data were analyzed using Kruskal-Wallis and Dunn's tests (α = 0.05). Results: Greater reduction in dentinal permeability was observed for 45S5 bioactive glasses (45S5_60 and 45S5_80) followed by NbG_80 and NbG_60 ( P < 0.05). The SEM/EDS analysis showed the formation of a barrier after the dentin treatment. Conclusions: Bioactive glasses with Nd:YAG laser on the dentin surface may be a promising alternative for the reduction of dentin permeability. Competing Interests: There are no conflicts of interest. (Copyright: © 2021 Journal of Conservative Dentistry.)
Databáze:	MEDLINE
Externí odkaz:	Zobrazit plný text záznamu