Journal of Conservative Dentistry
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Year : 2020  |  Volume : 23  |  Issue : 6  |  Page : 583-588

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

1 Department of Dentistry I, Federal University of Maranhão, São Luis, Maranhão, Brazil
2 Department of Restorative Dentistry, Institute of Science and Technology of São José dos Campos (UNESP) – São Paulo State University, SP, Brazil

Correspondence Address:
Prof. Leily Macedo Firoozmand
Department of Dentistry I, Federal University of Maranhão, Av. dos Portugueses, 1966, Zip Code: 65085680, São Luis, Maranhão
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Source of Support: None, Conflict of Interest: None

DOI: 10.4103/JCD.JCD_453_20

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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.

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