TY - JOUR
T1 - Dentine sealing provided by smear layer/smear plugs vs. adhesive resins/resin tags
AU - Carrilho, Marcela R.
AU - Tay, Franklin R.
AU - Sword, Jeremy
AU - Donnelly, Adam M.
AU - Agee, Kelli A.
AU - Nishitani, Yoshihiro
AU - Sadek, Fernanda T.
AU - Carvalho, Ricardo M.
AU - Pashley, David H.
PY - 2007/8
Y1 - 2007/8
N2 - 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 H2O 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.
AB - 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 H2O 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.
KW - Dentine permeability
KW - Dentine sealing
KW - Ethanol-saturated dentine
KW - Resin permeability
KW - Smear layer
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U2 - 10.1111/j.1600-0722.2007.00465.x
DO - 10.1111/j.1600-0722.2007.00465.x
M3 - Article
C2 - 17697173
AN - SCOPUS:34547917941
SN - 0909-8836
VL - 115
SP - 321
EP - 329
JO - European Journal of Oral Sciences
JF - European Journal of Oral Sciences
IS - 4
ER -