Bioactive glass and high‐intensity lasers as a promising treatment for dentin hypersensitivity: An in vitro study

Bioactive glass and high‐intensity lasers as a promising treatment for dentin hypersensitivity: An in vitro study

This in vitro study aimed to analyze the physical and chemical characteristics of the hypersensitive human dentin‐like surface after application of a bioactive glass (BG) paste (BG/Ac) irradiated or not with high‐power lasers. Dentin specimens were treated with 17% Ethylenediamine tetraacetic acid (...

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Bibliographic Details
Published in:Journal of biomedical materials research. Part B, Applied biomaterials Vol. 108; no. 3; pp. 939 - 947
Main Authors: Lee, Ester M. R., Borges, Roger, Marchi, Juliana, Paula Eduardo, Carlos, Marques, Márcia M.
Format: Journal Article
Language:English
Published: Hoboken, USA John Wiley & Sons, Inc 01-04-2020
Wiley Subscription Services, Inc
Subjects:
Aluminum
bioactive glass
Bioglass
Biological activity
Biomedical materials
Brushite
Carbon dioxide
Carbon dioxide lasers
CO2 laser
Collagen
Cracks
Dentin
dentin hypersensitivity
Ethylenediamine
Ethylenediaminetetraacetic acids
Fibers
Fourier transforms
Hydroxyapatite
Hypersensitivity
Infrared spectroscopy
Irradiation
laser
Lasers
Materials research
Materials science
Nd:YAG laser
Neodymium
Neodymium lasers
Obstructions
Organic chemistry
Scanning electron microscopy
Semiconductor lasers
Spectrum analysis
Surface reactions
Tubules
YAG lasers
Yttrium
Brushite
Nd:YAG laser
dentin hypersensitivity
CO2 laser
bioactive glass
laser
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Summary:This in vitro study aimed to analyze the physical and chemical characteristics of the hypersensitive human dentin‐like surface after application of a bioactive glass (BG) paste (BG/Ac) irradiated or not with high‐power lasers. Dentin specimens were treated with 17% Ethylenediamine tetraacetic acid (EDTA) solution to mimic a hypersensitive dentin and then submitted to neodymium: yttrium–aluminum–garnet (Nd:YAG) laser or CO2 laser irradiation prior and after application of BG/Ac. Characterizations were performed by using X‐ray diffraction, Fourier transformed infrared spectroscopy, scanning electron microscopy, and energy dispersive X‐ray spectroscopy. The results suggested that application of BG/Ac by itself caused some obstructions of dentinal tubules. Nd:YAG laser irradiation reduced the opening of the dentinal tubules with no changes in the collagen structure. CO2 laser irradiation caused dentin melting and resolidification along with cracks and chemical changes in collagen fibers. However, when BG/Ac paste was irradiated with lasers, a sequence of surface reactions between glass and dentin interface led to the formation of an amorphous hydroxyapatite layer, similar to that of an inorganic component of the normal dentin. Moreover, BG/Ac was able to prevent the formation of cracks and degradation of collagen fibers caused by CO2 irradiation. Overall, this study supports that application of BG/Ac paste irradiated by high‐power laser could represent an effective and long‐lasting therapeutic approach for dentin hypersensitivity.
Bibliography:Funding information
CNPq, Grant/Award Numbers: 134268/2015‐6, 307874/2014‐1, 130637/2016‐5; FAPESP, Grant/Award Numbers: 2016/16512‐9, 2011/19924‐2
ObjectType-Article-1
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ISSN:1552-4973
1552-4981
DOI:10.1002/jbm.b.34446