Portal de Periódicos da CAPES

Fluid Movement across the Resin-Dentin Interface during and after Bonding

2004; SAGE Publishing; Volume: 83; Issue: 11 Linguagem: Inglês

10.1177/154405910408301104

1544-0591

Makoto Hashimoto, Sachiko Ito, Franklin R. Tay, Nádia da Rocha Svizero, Hidehiko Sano, Masayuki Kaga, D.H. Pashley,

Dental Erosion and Treatment

This study evaluated the extent of water penetration through resin-dentin interfaces before and after being sealed with adhesives. Four adhesive resin systems (2 total-etch adhesives and 2 self-etching primer adhesives) were used in this study. Dentin disks were placed in a split-chamber device, and in situ fluid movement across dentin was measured, with and without physiological pressure, during bonding procedures or 24 hrs after bonding. The fluid movement across dentin occurs via dentin tubules after acid-etching. Large outward or inward fluid shifts across dentin were observed during air-drying and light-curing for resin application. The amount of fluid movement across resin-bonded dentin when total-etch adhesives were used was significantly greater than that with self-etching adhesives. The milder acid-etching effects of self-etching primers may retain hybridized smear plugs within the tubules that reduce outward fluid flow, resulting in superior dentin sealing.