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Influence of an oxygen‐inhibited layer on enamel bonding of dental adhesive systems: surface free‐energy perspectives
Author(s) -
Ueta Hirofumi,
Tsujimoto Akimasa,
Barkmeier Wayne W.,
Oouchi Hajime,
Sai Keiichi,
Takamizawa Toshiki,
Latta Mark A.,
Miyazaki Masashi
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.12231
Subject(s) - adhesive , enamel paint , materials science , composite material , composite number , primer (cosmetics) , surface energy , dental bonding , layer (electronics) , bond strength , chemistry , organic chemistry
The influence of an oxygen‐inhibited layer ( OIL ) on the shear bond strength ( SBS ) to enamel and surface free‐energy ( SFE ) of adhesive systems was investigated. The adhesive systems tested were Scotchbond Multipurpose ( SM ), Clearfil SE Bond ( CS ), and Scotchbond Universal ( SU ). Resin composite was bonded to bovine enamel surfaces to determine the SBS , with and without an OIL , of adhesives. The SFE of cured adhesives with and without an OIL were determined by measuring the contact angles of three test liquids. There were no significant differences in the mean SBS of SM and CS specimens with or without an OIL ; however, the mean SBS of SU specimens with an OIL was significantly higher than that of SU specimens without an OIL . For all three systems, the mean total SFE ( γ S ), polarity force (γ S p ), and hydrogen bonding force (γ S h ) values of cured adhesives with an OIL were significantly higher than those of cured adhesives without an OIL . The results of this study indicate that the presence of an OIL promotes higher SBS of a single‐step self‐etch adhesive system, but not of a three‐step or a two‐step self‐etch primer system. The SFE values of cured adhesives with an OIL were significantly higher than those without an OIL . The SFE characteristics of the OIL of adhesives differed depending on the type of adhesive.