Clinical Dentistry and Research, vol.45, no.2, pp.78-85, 2021 (Peer-Reviewed Journal)
Background and Aim: To evaluate the tensile bond strength
of an aged/non-aged glass hybrid restorative repaired with
different restorative materials.
Methods: A total of 60 beam-shaped specimens (16x2x2 mm)
were prepared using glass-hybrid restorative material (Equia
Forte, GC) and then divided into two main groups (n=30); I-nonaged, II-aged (5000X;5-55°C). Twelve specimens from each
group were left intact for control group (without repair) and the
rest 18 specimens were sectioned into two halves acquiring
36 beams. The groups (I and II) were then subdivided into four
groups according to the repairing materials (n=12); a- control
(Intact glass hybrid (GH), Equia Forte (GC Co.), b- glass hybrid,
Equia Forte, c- a resin modified glass ionomer cement (RMCIS),
Riva Light Cure (SDI Limited), d- a microhybrid resin composite
(CR), Gradia direct posterior (GC Co.) After 24 h storage, the
specimens were subjected to tensile bond strength test and
the data were analyzed using two-way ANOVA and Bonferroni
Results: The tensile bond strength of the artificially aged
group repaired with resin composite, Gradia Direct Posterior was
found to be significantly higher than non-aged group (p<0.05).
No statistically significant difference was found between aged
and non-aged groups for the rest of the materials (p>0.05).
There was no statistically significant difference between
the repairing materials and control group regardless of aging
Conclusion: The tested glass-hybrid restorative material
exhibited better tensile bond strength after artificial aging
when repaired with resin composite. Aging did not affect the
bond strength of glass-hybrid material when repaired with the
glass-ionomer based restorative materials.