Microleakage of a New Restorative System in Posterior Teeth

Objectives: New developments in adhesive dentistry include self-etching adhesives and nanofilled composites. The null hypothesis tested in this in vitro study was that the combination of a self-etching adhesive, Adper Prompt (ADP, 3M ESPE), with a nanofilled composite (Filtek Supreme, SUP, 3M ESPE) would not result in greater microleakage than that obtained with phosphoric acid etching followed either by a nanofilled composite or an universal hybrid composite . Methods: Class V’s were prepared in the lingual and buccal aspects of thirty caries-free extracted third molars, with one margin in dentin/cementum and the other in enamel. Specimens were randomly assigned to three groups: (1) ADP+ SUP; (2) Single Bond (3M ESPE) + SUP; (3) Excite + Tetric Ceram (Ivoclar Vivadent). Specimens were isolated with nail polish except for a 1 mm-wide rim around the restoration, immersed in 0.5% basic fuchsin for 24 h at 37°C, sectioned, and evaluated for leakage (0-3 scale). Results: Medians (M) were analyzed with nonparametric tests (Mann-Whitney and Median tests, p£0.05, superscript letters):

The null hypothesis was accepted. Adper Prompt combined with Filtek Supreme resulted in statistically similar dentin (p>0.301) and enamel (p>0.114) microleakage scores than Single Bond + Filtek Supreme or Excite+Tetric Ceram. Conclusions: The new restorative system resulted in enamel and dentin marginal sealing comparable to total-etch adhesives.