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Preservation of resin–dentin interfaces treated with benzalkonium chloride adhesive blends
Author(s) -
Sabatini Camila,
Ortiz Pilar A.,
Pashley David H.
Publication year - 2015
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.12176
Subject(s) - dentin , benzalkonium chloride , adhesive , bond strength , molar , chemistry , hydroxyproline , nuclear chemistry , dentistry , degradation (telecommunications) , simulated body fluid , materials science , composite material , chromatography , scanning electron microscope , biochemistry , organic chemistry , medicine , telecommunications , layer (electronics) , computer science
Reducing collagen degradation within hybrid layers may contribute to the preservation of adhesive interfaces. This study evaluated the stability of resin–dentin interfaces treated with benzalkonium chloride ( BAC )‐modified adhesive blends and assessed collagen degradation in dentin matrices treated with BAC . The etch‐and‐rinse adhesive, Adper Single Bond Plus, modified with 0.5% and 1.0% BAC, was evaluated for microtensile bond strength (μTBS) and nanoleakage (NL) after 24 h and 1 yr. Thirty completely demineralized dentin beams from human molars were dipped for 60 s in deionized water ( DW ; control), or in 0.5% or 1.0% BAC , and then incubated in simulated body fluid ( SBF ). Collagen degradation was assessed by quantification of the dry mass loss and the amount of hydroxyproline ( HYP ) released from hydrolyzed specimens after 1 or 4 wk. Although all groups demonstrated a significant increase in NL after 1 yr, adhesive modified with 0.5% BAC showed stable bond strength after 1 yr (9% decrease) relative to the control (44% decrease). Significantly less HYP release and dry mass loss were observed for both 0.5% and 1.0% BAC relative to the control. This in vitro study demonstrates that BAC contributes to the preservation of resin–dentin bonds for up to 1 yr by reducing collagen degradation.