Premium
Dentine sealing provided by smear layer/smear plugs vs. adhesive resins/resin tags
Author(s) -
Carrilho Marcela R.,
Tay Franklin R.,
Sword Jeremy,
Donnelly Adam M.,
Agee Kelli A.,
Nishitani Yoshihiro,
Sadek Fernanda T.,
Carvalho Ricardo M.,
Pashley David H.
Publication year - 2007
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/j.1600-0722.2007.00465.x
Subject(s) - smear layer , adhesive , ethanol , materials science , layer (electronics) , chemistry , composite material , hydrostatic pressure , dentin , organic chemistry , physics , thermodynamics
The aim of this study was to evaluate the ability of five experimental resins, which ranged from hydrophobic to hydrophilic blends, to seal acid‐etched dentine saturated with water or ethanol. The experimental resins (R1, R2, R3, R4, and R5) were evaluated as neat bonding agents (100% resin) or as solutions solvated with absolute ethanol (70% resin/30% ethanol). Fluid conductance was measured at 20 cm H 2 O hydrostatic pressure after sound dentine surfaces were: (i) covered with a smear layer; (ii) acid‐etched; or (iii) bonded with neat or solvated resins, which were applied to acid‐etched dentine saturated with water or ethanol. In general, the fluid conductance of resin‐bonded dentine was significantly higher than that of smear layer‐covered dentine. However, when the most hydrophobic neat resins (R1 and R2) were applied to acid‐etched dentine saturated with ethanol, the fluid conductance was as low as that produced by smear layers. The fluid conductance of resin‐bonded dentine saturated with ethanol was significantly lower than for resin bonded to water‐saturated dentine, except for resin R4. Application of more hydrophobic resins may provide better sealing of acid‐etched dentine if the substrate is saturated with ethanol instead of with water.