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BIBTEX RIS

Morphology and thickness of the diffusion of resin through demineralized or unconditioned dentinal matrix

2002; UNIVERSIDADE DE SÃO PAULO; Volume: 16; Issue: 2 Linguagem: Inglês

10.1590/s1517-74912002000200004

ISSN

1678-8079

Autores

César Augusto Galvão Arrais, Marcelo Giannini,

Tópico(s)

Dental Erosion and Treatment

Resumo

The formation of a hybrid layer is the main bonding mechanism of current dentin-bonding systems. This study evaluated the morphology and thickness of the resin-infiltrated dentinal layer after the application of adhesive systems. The dentin-bonding agents were evaluated on flat dentinal preparations confected on the occlusal surfaces of human teeth. The test specimens were prepared and inspected under scanning electron microscopy at a magnification of X 2,000. The adhesive systems were responsible for different hybrid layer thicknesses (p < 0.05), and the mean values were: for Scotchbond MP Plus (SM), 7.41 +/- 1.24 micrometer for Single Bond (SB), 5.55 +/- 0.82 micrometer for Etch & Prime 3.0 (EP), 3.86 +/- 1.17 micrometer and for Clearfil SE Bond (CB), 1.22 +/- 0.45 micrometer. The results suggest that the conventional three-step adhesive system (SM) was responsible for the thickest hybrid layer, followed by the one-bottle adhesive (SB). The self-etching adhesives, EP and CB, produced the formation of the thinnest hybrid layers.

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