Abstract
Objectives. To evaluate and compare the
relationship between enamel bond strength
and microleakage of two composite based
restorative systems.
Methods. 40 third molars were randomly
divided into two groups: 20 molars restored
with the Adper Single bond 2 + Filtek Z250
XT (3M ESPE; ST PAUL, MN, USA) system
and 20 with the Tetric N Bond + Tetric
N Ceram (Ivoclar Vivadent; Schaan, Liechtenstein)
system. “Half of the teeth” in each
group were subjected to a bond strength
test, while the others were subjected to the
microleakage test.
Results. The means and standard deviation
of the bond strength resistance were 27.93
(± 9.55) MPa for Adper Single bond 2 +
Filtek Z250 XT system and 33.12 (± 8.18)
MPa for Tetric N Bond + Tetric N Ceram
system (p = 0.049). Regarding microleakage
values, there were no statistically significant
differences between the groups
(p = 0.478). No significant correlation
was observed between microtensile bond
strength and microleakage (R2 = 0.0909,
p = 0.196).
Conclusions. No relationship was found
between adhesive bond values and degree of
microleakage.
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