| Summary: | BACKGROUND AND AIM: Different studies evaluating one-step self-etch (SE) adhesive systems show contradictory
findings, so the aim of this study was to compare the microleakage of one-step SE adhesive systems and CLEARFIL SE
BOND (CSB) (that serves as the “gold-standard” SE adhesive) with low shrinkage composites.
METHODS: In this in vitro study, Class V cavities with the occlusal margin in enamel and cervical margin in cementum
were prepared on the buccal and lingual surfaces of 36 human premolars and molars (72 cavities). The enamel surfaces
of the cavities were etched with 37% phosphoric acid and then the specimens were divided into six groups of 6
(12 cavities) and the cavities were restored according bellow: Group 1 (Kalore-GC + G-Bond), Group 2 (Grandio
+ Futurabond NR), Group 3 (Aelite LS Posterior + All Bond SE), Group 4 (Kalore-GC + CSB), Group 5 (Grandio
+ CSB), and Group 6 (Aelite LS Posterior + CSB). All the specimens were thermocycled for 2000 cycles (5-55 °C) and
then placed in 0.5% basic fuchsine dye for 24 hours at 37 °C and finally sectioned and observed under the
stereomicroscope. Data were analyzed using Kruskal-Wallis, Mann-Whitney, and Wilcoxon tests at a P < 0.050 level of
significance.
RESULTS: In comparison between occlusal and gingival margins in each group, microleakage in occlusal margins was
significantly less than the gingival margins (except Kalore + CSB) (P > 0.050). There were no significant differences in
microleakage among two-step and one-step SE adhesive systems on both the occlusal and gingival margins.
CONCLUSION: According to this study, two-step SE adhesive system (CSB) did not provide better marginal seal than the
one-step SE adhesive systems.
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