Objective: The purpose of this study was to evaluate
bond strengths (µTBS) of an experimental
all-in-one adhesive to enamel and dentin, and compare it to commercially
available current adhesive systems. Methods: Bovine incisors were prepared with
600-grit SiC paper to expose flat enamel and flat mid-coronal dentin. The teeth
were randomly assigned to 4 adhesives: Experimental Prompt (3M ESPE), Prompt
L-Pop (3M ESPE), Single Bond (3M ESPE) and SE Bond (Kuraray). The adhesives were applied following manufacturer’s
instructions, and a crown was then built incrementally to a height of 3-5 mm
over the bonded adhesive using a resin composite. After 24 h
of storage in tap water at 37oC, the teeth were sectioned into 0.7
mm thick slices, the interfaces trimmed for µTBS (ca 1mm2) and
loaded to failure at crosshead speed of 1 mm/min using a table top tester
(EZ-Test). All data were statistically analyzed by one-way ANOVA and Fisher’s
PLSD test (p<0.05).
|
Adhesive Systems
|
Enamel (MPa±SD)
|
Dentin (MPa±SD)
|
|
Angel 1
|
34.9±6.2 a
|
25.7±7.0 b
|
|
Prompt L-Pop
|
31.2±10.9 a
|
26.8±10.9 b
|
|
SE Bond
|
28.5±10.5 a
|
42.5±9.2 c
|
|
Single Bond
|
44.3±8.7
|
48.7±15.5 c
|
Same
superscripts represent no statistical significant difference (p>0.05).
Results: Bond strength of Angel 1 was significantly
higher to enamel than to dentin (p=0.0287). It also presented similar bond
strength to enamel and dentin as Prompt L-Pop. Bond strength of SB was the
highest to enamel and dentin (p<0.05). SE Bond disclosed the lowest bond
strength to enamel among all groups. Conclusion: Angel 1 bonded better to
enamel and produced results similar to those of Prompt L-Pop. This study was
supported by 3M ESPE.