Microleakage Evaluation of Bulk-fill Composites Used with Different Adhesive Systems
Statement of Problem: The integrity of adhesive bond at the tooth/resin
interface performs an essential role in the clinical success and survival of
Objectives: The purpose of this study was to compare microleakage of Class
II cavities restored with total-etch or self-etch adhesives and different bulk-fill
Materials and methods: Conventional class II cavities were prepared on forty
sound human premolar teeth with approximately same size and shape. Half
of the cavities restored with a sonic-resin placement system (SonicFill, Kerr),
and the other half of the cavities with Tetric N-Ceram (TNC) composite with
total-etch; Optibond Solo Plus or self-etch; Optibond XTR, adhesives. The
samples stored in distilled water at 37 ° C for 24 hours, and then specimens
were under 1000 thermal cycles. The teeth were covered with two layers
of nail varnish except for one mm around gingival margins, and then were
dipped in glass vials for 48 h at 37°C in a neutral-buffered 2% methy¬leneblue
the dye, the teeth were
rinsed and the
varnish was removed, and stored individually in a glass vial containing 65%
nitric acid. The vials were centrifuged, and 100 μl of the super¬natant from
each was then analysed in a UV-Visible spectro¬photometer after a kinetic
assay at 550 nm wavelength using concentrat¬ed nitric acid as the blank.
So dye extraction was conducted to investigate the leakage test. Data were
analysed by ANOVA test (P<0.05).
Results: The highest and lowest microleakage was related to self-etch/
SonicFill and total-etch/Tetric N-Ceram groups respectively. The amount
of microleakage was not significantly different among experimental groups
Conclusions: Both of the bulk-fill composites with various adhesives had the
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pISSN :2383-3971 eISSN :2383-398X