In vitro Evaluation of Repair Bond Strength to Bulk-fill Composites Using Two Silane-Free Universal Adhesives, with and without Silane Application

Objective: To evaluate the effect of silane-free universal adhesives systems on the repair shear bond strength (SBS) of sonic-activated bulk-fill [SonicFill (SF) Kerr, USA] composite applying additional silane in the repair of bulk-fill composite.Methods: Sonic-activated bulk-fill composite samples (n=40) were prepared using a teflon mold (6 mm x 4 mm) and polymerized.Then all samples were kept in an incubator to simulate the aging process at 37 C for one month.Aged composite samples were embedded in acrylic resin.For the repair, the specimen surfaces were roughened with a diamond bur.They were divided into 2 groups (n=20) according to the adhesive system used and then into two subgroups (n=10) as additional silane was applied or unapplied.Adhesive systems Ambar Universal Bond (AUB), (FGM, Brazil), G-Premio Bond (GPB) (GC, USA) and silane (G-Multi primer GC, Tokyo, Japan) were applied according to the manufacturer's instructions.Samples were subjected to a shear bond test in a universal testing device.For statistical analysis, one-way ANOVA test was performed (p<0.05). Results:The highest SBS value was obtained in the silane-treated AUB group (21.886.4),while the lowest SBS value was obtained in the silane-treated GPB group (16.076.2).No statistically Z Ama: Silan iermeyen universal adeziv sistemlerinin, sonic enerji ile aktive edilmi bulk-fll (SonicFill (SF), Kerr, ABD) kompozitinin tamirinde ilave silan uygulamasnn tamir balanma dayanm (TBD) zerindeki etkisini deerlendirmektir.Yntemler: Sonic enerji ile aktive edilmi bulk-fill kompozit rnekler (n=40) bir teflon kalp (6 mm x 4 mm) kullanlarak hazrland ve polimerize edildi.Daha sonra tm numuneler yalanma srecini simle etmek iin bir inkbatrde 37 C'