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J Conserv Dent. 2013 May;16(3):189-93. doi: 10.4103/0972-0707.111311.

The effect of a new-generation flowable composite resin on microleakage in Class V composite restorations as an intermediate layer.

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Department of Restorative Dentistry and Endodontics, Faculty of Dentistry, University of Erciyes, Kayseri, Turkey.



To evaluate the effect of application a new-generation bulk-fill flowable composite resin as an intermediate material between composite resin and dental substrates on micro-leakage in Class V composite restorations.


A total of 144 Class V cavities were prepared in 72 human molars. Specimens were then randomly distributed among three groups according to adhesive system applied (Group 1: Clearfil SE Bond; Group 2: Adper Easy One; Group 3: Adhesive 200T), and each group was divided into three subgroups according to liner material used (Group A: No liner-control group; Group B: Aelite Flo LV, low viscosity microhybrid composite; Group C: Smart dentin replacement). All cavities were restored using resin composite (Aelite LS, low shrinkage posterior composite). Specimens were stained with 0.5% basic fuchsin and evaluated dye penetration.


There was no significant difference in dye penetration was found between the control and the experimental groups.


Micro-leakage is not affected by the application of either conventional or new-generation flowable composite resin as an intermediate material between composite resin and dental substrates.


Adhesives; flowable composite resins; intermediate layers; microleakage

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