Micropermeability of current self-etching and etch-and-rinse adhesives bonded to deep dentine: A comparison study using a double-staining/confocal microscopy technique

Salvatore Sauro, David Henry Pashley, Francesco Mannocci, Franklin Chi Meng Tay, Peter Pilecki, Martyn Sherriff, Timothy F. Watson

Research output: Contribution to journalArticle

69 Scopus citations

Abstract

Water sorption decreases the mechanical properties and the bond strengths of resin-bonded dentine. The aim of this study was to evaluate the micropermeability of several self-etching and etch-and-rinse adhesives. Optibond FL, Silorane, Scotchbond 1XT, G-Bond, and DC-Bond were bonded under simulated pulpal pressure. A 10 wt% solution of ammoniacal silver nitrate and a 1 wt% solution of rhodamine B were injected into the pulp chamber at 20 cm of water pressure. The dentine-adhesive interfaces were examined using a confocal scanning microscope. Micropermeability was detected in all the adhesives. DC-Bond, G-Bond, and Scotchbond 1XT showed voids along the resin-bonded interface. Silorane and Optibond FL showed an adhesive layer that was free from water trees and micropermeability. The double staining technique is a method that gives accurate results in the study of the resin-dentine micropermeability. Each class of adhesive has a different distribution of micropermeability. The higher the micropermeability, the higher the risk of defects at the resin-dentine interface, which may represent the pathway for hydrolytic and enzymatic degradation of resin-dentine bonds over time.

Original languageEnglish (US)
Pages (from-to)184-193
Number of pages10
JournalEuropean Journal of Oral Sciences
Volume116
Issue number2
DOIs
StatePublished - Apr 1 2008

Keywords

  • Confocal microscopy
  • Micropermeability
  • Resin-bonded dentine
  • Simulated pulpal pressure
  • Water uptake

ASJC Scopus subject areas

  • Dentistry(all)

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