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Effect of Hydration Variability on Hybrid Layer Properties of a Self-etching Versus an Acid-etching System by Karen A. Schulze; Sofia A. Oliveira; Robert S. Wilson; Stuart A. Gansky; Grayson W. Marshall; Sally J. Marshall is a Engineering article available to read on EtoBox.

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The hypothesis tested in this study was that the self-etching system (Clearfil SE Bond, CSE) is less sensitive to surface moisture variability than the system that uses a separate acid-etching step (Single Bond, SB). Eighteen dentin specimens were bonded to composite using CSE or SB. Three different surface moisture conditions per bonding type (overwet, w; dry, d; and visibly moist, n [normal]) were applied prior to bonding dentin to composite. One cross section of each sample was analyzed with lines of nanoindentations crossing perpendicular to the bonding interface. An additional set of bonded samples was fixed and cross sectioned before the hybrid layer thickness was measured in scanning electron microscopy. The nanoindentations revealed significant differences in indentation modulus (E(i)) and hardness (H) for the hybrid layer comparing SBn, E(i) = 2.7(+/-1.6); H = 0.24(+/-0.1) GPa with SBd, E(i) = 0.9(+/-0.7); H = 0.9(+/-0.05) GPa, respectively, while CSE showed no differences among the groups. A significantly greater demineralized zone below the hybrid layer was found for SBd. The hybrid layer was wider for both CSEd and SBd. In conclusion the hypothesis was verified; CSE exh

Who reads Effect of Hydration Variability on Hybrid Layer Properties of a Self-etching Versus an Acid-etching System?

Author

Karen A. Schulze; Sofia A. Oliveira; Robert S. Wilson; Stuart A. Gansky; Grayson W. Marshall; Sally J. Marshall

Publisher

Elsevier Science; Elsevier ; Elsevier Ltd.; Elsevier BV (ISSN 0142-9612)

Published

2005

Language

EN

Field

Engineering (Physical Sciences)