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Promotion of adhesive penetration and resin bond strength to dentin using non‐thermal atmospheric pressure plasma
Author(s) -
Kim JaeHoon,
Han GeumJun,
Kim ChangKeun,
Oh KyuHwan,
Chung SungNo,
Chun BaeHyeock,
Cho ByeongHoon
Publication year - 2016
Publication title -
european journal of oral sciences
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.802
H-Index - 93
eISSN - 1600-0722
pISSN - 0909-8836
DOI - 10.1111/eos.12246
Subject(s) - dentin , adhesive , bond strength , composite material , materials science , penetration (warfare) , atmospheric pressure plasma , raman spectroscopy , scanning electron microscope , plasma , layer (electronics) , physics , optics , operations research , quantum mechanics , engineering
Non‐thermal atmospheric pressure plasmas ( NT ‐ APP s) have been shown to improve the bond strength of resin composites to demineralized dentin surfaces. Based on a wet‐bonding philosophy, it is believed that a rewetting procedure is necessary after treatment with NT ‐ APP because of its air‐drying effect. This study investigated the effect of ‘plasma‐drying’ on the bond strength of an etch‐and‐rinse adhesive to dentin by comparison with the wet‐bonding technique. Dentin surfaces of human third molars were acid‐etched and divided into four groups according to the adhesion procedure: wet bonding, plasma‐drying, plasma‐drying/rewetting, and dry bonding. In plasma treatment groups, the demineralized dentin surfaces were treated with a plasma plume generated using a pencil‐type low‐power plasma torch. After the adhesion procedures, resin composite/dentin‐bonded specimens were subjected to a microtensile bond‐strength test. The hybrid layer formation was characterized by micro‐Raman spectroscopy and scanning electron microscopy. The plasma‐drying group presented significantly higher bond strength than the wet‐bonding and dry‐bonding groups. Micro‐Raman spectral analysis indicated that plasma‐drying improved the penetration and polymerization efficacy of the adhesive. Plasma‐drying could be a promising method to control the moisture of demineralized dentin surfaces and improve the penetration of adhesive and the mechanical property of the adhesive/dentin interface.