Romanian Journal of Medical and Dental Education Volum 9 Issue 3, 2020 INFLUENCE OF ETCHING STRATEGY ON THE ADHESIVE INTERFACE MEDIATED BY A UNIVERSAL BONDING SYSTEM

INFLUENCE OF ETCHING STRATEGY ON THE ADHESIVE INTERFACE MEDIATED BY A UNIVERSAL BONDING SYSTEM

Gianina Iovan, Simona Stoleriu, Cristina-Angela Ghiorghe, Sorina Solomon, Irina Nica, Alexandru Iovan, Ionuț Tărăboanță, Sorin Andrian

ABSTRACT

The   aim   of   the   study   was   to   evaluate   the   composite   resin-tooth   interface when using a universal adhesive applied in different etching strategies. Materials and method: 20 class V cavities were prepared in extracted teeth and restored with a composite resin using a universal adhesive system. Half of the restorations were applied using etch-and-rinse technique and the other half were applied with self-etch technique.  The   samples had been subjected to a dye penetration microleakage test and then the teeth were axially sectioned. The microleakage scores and the morphology of the adhesive joint were evaluated using an optical microscope and a scanning electron microscope. Results: The microleakage scores did not show a significant difference between the self-etch group and the total etch-group. For both groups, no significant gaps were noticed, however few cracks were visible within the adhesive layer.  The SEM images showed the preservation of a tide contact   between   the   composite   resin   and   the   dental   tissues in most specimens of the both groups.   An   adhesive   joint   involving   a layer of adhesive resin was formed between composite resin and both enamel and dentin regardless of the chosen technique (self-etch or total etch strategy). Conclusions: The immediate sealing qualities and the morphology of the interface did not significantly change when total etch strategy had been used when comparing to self-etch strategy.

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