Browse

Effect of light-cure time of adhesive resin on the thickness of the oxygen-inhibited layer and the microtensile bond strength to dentin

Cited 41 time in Web of Science Cited 43 time in Scopus
Authors
Kim, Jong-Soon; Choi, Yong-Hoon; Cho, Byeong-Hoon; Son, Ho-Hyun; Lee, In-Bog; Um, Chung-Moon; Kim, Chang-Keun
Issue Date
2006
Publisher
Wiley-Blackwell
Citation
J Biomed Mater Res Part B: Appl Biomater 2006;78B:115–123
Keywords
dentin adhesiveoxygen-inhibited layermicrotensile bond strengthcrack mechanismFT-NIR
Abstract
A thick oxygen-inhibited layer (OIL) on a cured adhesive layer (AL) is believed to
result in both good adaptation of composite resin (CR) and high bond strength. A high degree
of conversion (DC) of the AL is also needed for durable bonding. This study evaluated the
hypothesis that increasing the DC by prolonging the light-curing time of adhesive bonding
resin might decrease the bond strength of the adhesive to dentin because of the subsequent
thinning of the OIL thickness. The OIL thickness and the DC of solvent-removed One Step
and D/E bonding resin of All Bond 2 (Bisco, USA) were measured simultaneously with FT-NIR
spectroscopy according to increasing light-cure times (10, 20, 30, and 60 s) so as to evaluate
their effect on the microtensile bond strength. The bonded interfaces were evaluated using
scanning electron microscopy. Excessive irradiation of light-curing adhesives increased the
DC, but decreased the OIL thickness. When the OIL was significantly thin by curing the
adhesives for 30 or 60 s, defects were observed at the interface between the AL and the CR,
as well as at the interface between the AL and the hybrid layer. When the OIL was thick, free
radicals from the overlying CR may have diffused into the unreacted monomer mixtures of the
OIL, chemically connecting the cured AL and the newly curing composite. It was found that
to obtain maximum dentin bond strength, light-curing adhesives should be cured for the
irradiation time recommended by the manufacturer.
ISSN
1552-4973
Language
English
URI
http://hdl.handle.net/10371/68900
DOI
https://doi.org/10.1002/jbm.b.30463
Files in This Item:
There are no files associated with this item.
Appears in Collections:
College of Dentistry/School of Dentistry (치과대학/치의학대학원)Dept. of Dentistry (치의학과)Journal Papers (저널논문_치의학과)
  • mendeley

Items in S-Space are protected by copyright, with all rights reserved, unless otherwise indicated.

Browse