The purpose of this study was to
evaluate the bond strength of a
resin-modified glass ionomer
cement to dentin employing
different dentin surface
treatments. Forty sound and
erupted thirds molars were
selected and embedded in a ¾
inch diameter PVC ring. The
occlusal surfaces were ground
until dentin was exposed. The
specimens were randomly
assigned to four groups (n = 10):
G1- No dentin treatment; G2 -
Dentin treated with 20%
polyacrylic acid; G3 - Dentin
treated with 37% phosphoric
acid and left moist, and G4-
Dentin treated with 37%
phosphoric acid and dried. After
24 hours, specimens were tested
for shear bond strength at
1mm/min crosshead speed. Data
was evaluated by ANOVA and
Fisher’s test, at a 5% confidence
level. The treatment of dentin
with 20% polyacrylic acid
resulted in significantly higher
bond strength values of Fuji II LC
resin-modified glass-ionomer
cement to dentin when compared
to no dentin treatment or 37%
phosphoric acid with moist
dentin. The treatment of dentin
with 20% polyacrylic acid
showed a non-significant
increase in bond strength values
when compared to 37%
phosphoric acid with dry dentin.