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Does laser diode irradiation improve the degree of conversion of simplified dentin bonding systems?

Simplified dentin-bonding systems are clinically employed for most adhesive procedures, and they are prone to hydrolytic degradation. OBJECTIVE: This study aimed to investigate the effect of laser diode irradiation on the degree of conversion (DC), water sorption (WS), and water solubility (WSB) of...

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Autores principales: BRIANEZZI, Leticia Ferreira de Freitas, MAENOSONO, Rafael Massunari, BIM, Odair, ZABEU, Giovanna Speranza, PALMA-DIBB, Regina Guenka, ISHIKIRIAMA, Sérgio Kiyoshi
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Faculdade De Odontologia De Bauru - USP 2017
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5595110/
https://www.ncbi.nlm.nih.gov/pubmed/28877276
http://dx.doi.org/10.1590/1678-7757-2016-0461
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author BRIANEZZI, Leticia Ferreira de Freitas
MAENOSONO, Rafael Massunari
BIM, Odair
ZABEU, Giovanna Speranza
PALMA-DIBB, Regina Guenka
ISHIKIRIAMA, Sérgio Kiyoshi
author_facet BRIANEZZI, Leticia Ferreira de Freitas
MAENOSONO, Rafael Massunari
BIM, Odair
ZABEU, Giovanna Speranza
PALMA-DIBB, Regina Guenka
ISHIKIRIAMA, Sérgio Kiyoshi
author_sort BRIANEZZI, Leticia Ferreira de Freitas
collection PubMed
description Simplified dentin-bonding systems are clinically employed for most adhesive procedures, and they are prone to hydrolytic degradation. OBJECTIVE: This study aimed to investigate the effect of laser diode irradiation on the degree of conversion (DC), water sorption (WS), and water solubility (WSB) of these bonding systems in an attempt to improve their physico-mechanical resistance. MATERIAL AND METHODS: Two bonding agents were tested: a two-step total-etch system [Adper™ Single Bond 2, 3M ESPE (SB)] and a universal system [Adper™ Single Bond Universal, 3M ESPE (SU)]. Square-shaped specimens were prepared and assigned into 4 groups (n=5): SB and SU (control groups – no laser irradiation) and SB-L and SU-L [SB and SU laser (L) – irradiated groups]. DC was assessed using Fourier transform infrared spectroscopy with attenuated total reflectance. Additional uncured resin samples (≈3.0 µL, n=5) of each adhesive were also scanned for final DC calculation. For WS/WSB tests, similar specimens (n=10) were prepared and measured by monitoring the mass changes after dehydration/water storage cycles. For both tests, adhesive fluids were dropped into standardized Teflon molds (6.0×6.0×1.0 mm), irradiated with a 970-nm laser diode, and then polymerized with an LED-curing unit (1 W/cm(2)). RESULTS: Laser irradiation immediately before photopolymerization increased the DC (%) of the tested adhesives: SB-L>SB>SU-L>SU. For WS/WSB (μg/mm(3)), only the dentin bonding system (DBS) was a significant factor (p<0.05): SB>SU. CONCLUSION: Irradiation with a laser diode improved the degree of conversion of all tested simplified dentin bonding systems, with no impact on water sorption and solubility.
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spelling pubmed-55951102017-09-18 Does laser diode irradiation improve the degree of conversion of simplified dentin bonding systems? BRIANEZZI, Leticia Ferreira de Freitas MAENOSONO, Rafael Massunari BIM, Odair ZABEU, Giovanna Speranza PALMA-DIBB, Regina Guenka ISHIKIRIAMA, Sérgio Kiyoshi J Appl Oral Sci Original Articles Simplified dentin-bonding systems are clinically employed for most adhesive procedures, and they are prone to hydrolytic degradation. OBJECTIVE: This study aimed to investigate the effect of laser diode irradiation on the degree of conversion (DC), water sorption (WS), and water solubility (WSB) of these bonding systems in an attempt to improve their physico-mechanical resistance. MATERIAL AND METHODS: Two bonding agents were tested: a two-step total-etch system [Adper™ Single Bond 2, 3M ESPE (SB)] and a universal system [Adper™ Single Bond Universal, 3M ESPE (SU)]. Square-shaped specimens were prepared and assigned into 4 groups (n=5): SB and SU (control groups – no laser irradiation) and SB-L and SU-L [SB and SU laser (L) – irradiated groups]. DC was assessed using Fourier transform infrared spectroscopy with attenuated total reflectance. Additional uncured resin samples (≈3.0 µL, n=5) of each adhesive were also scanned for final DC calculation. For WS/WSB tests, similar specimens (n=10) were prepared and measured by monitoring the mass changes after dehydration/water storage cycles. For both tests, adhesive fluids were dropped into standardized Teflon molds (6.0×6.0×1.0 mm), irradiated with a 970-nm laser diode, and then polymerized with an LED-curing unit (1 W/cm(2)). RESULTS: Laser irradiation immediately before photopolymerization increased the DC (%) of the tested adhesives: SB-L>SB>SU-L>SU. For WS/WSB (μg/mm(3)), only the dentin bonding system (DBS) was a significant factor (p<0.05): SB>SU. CONCLUSION: Irradiation with a laser diode improved the degree of conversion of all tested simplified dentin bonding systems, with no impact on water sorption and solubility. Faculdade De Odontologia De Bauru - USP 2017 /pmc/articles/PMC5595110/ /pubmed/28877276 http://dx.doi.org/10.1590/1678-7757-2016-0461 Text en http://creativecommons.org/licenses/by/4.0/ This is an Open Access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
spellingShingle Original Articles
BRIANEZZI, Leticia Ferreira de Freitas
MAENOSONO, Rafael Massunari
BIM, Odair
ZABEU, Giovanna Speranza
PALMA-DIBB, Regina Guenka
ISHIKIRIAMA, Sérgio Kiyoshi
Does laser diode irradiation improve the degree of conversion of simplified dentin bonding systems?
title Does laser diode irradiation improve the degree of conversion of simplified dentin bonding systems?
title_full Does laser diode irradiation improve the degree of conversion of simplified dentin bonding systems?
title_fullStr Does laser diode irradiation improve the degree of conversion of simplified dentin bonding systems?
title_full_unstemmed Does laser diode irradiation improve the degree of conversion of simplified dentin bonding systems?
title_short Does laser diode irradiation improve the degree of conversion of simplified dentin bonding systems?
title_sort does laser diode irradiation improve the degree of conversion of simplified dentin bonding systems?
topic Original Articles
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5595110/
https://www.ncbi.nlm.nih.gov/pubmed/28877276
http://dx.doi.org/10.1590/1678-7757-2016-0461
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