From the very beginning of adhesive dentistry, a relatively simple technique made possible the efficient and durable adhesion to the enamel, which did not apply to the dentine until the last decades. To this purpose, several strategies were introduced, of which the strategy of total etching and that of self-etching primers stood out and competed from the point of view of obtaining an ideal marginal sealing and of the possibility of postoperative tooth sensitivity (DPS). The objective of this research was to t est i f a a n a dhesive s ystem u sing a S E (selfetching technique) would determine a reduced postoperative tooth sensitivity in terms of frequency and intensity in comparison to an adhesive system using the total etching technique.
Material and method: 35 restorations were placed with a SE material (Unifil Bond, GC) and 38 restorations were placed with Prime & Bond NT (Dentsply De Trey) which uses 36% phosphoric acid for simultaneous conditioning of the enamel and dentine. The preparations had a minimally invasive design with all the beveled margins in enamel. The teeth were restored with a hybrid composite resin indicated for posterior teeth restorations: Gradia Unifil Bond (GC) and FulFil eXtra for Prime & Bond NT (Detrey Dentsply). The restored teeth were assessed preoperatively and postoperatively after 2 weeks, 8 weeks and 6 months in order to detect sensitivity to cold (ice), air and masticating forces. Results and conclusions: The values achieved in air stimulation (intensity of sensitivity) were lower in the
group that used Unifil Bond adhesive system in comparison to the group for which a Prime & Bond NT adhesive system was applied. The values achieved for all the studied parameters in all study intervals were not significantly different from a statistic point of view.
- composite resins
- POSTOPERATIVE TOOTH SENSITIVITY.
- SELF-ETCHING PRIMERS