Effects of acid concentration on hybrid layer thickness: A SEM study.
Published: 2006
Language: eng
Number of pages: 98
ISBN-13: 9780494211045
Description: Sixty extracted human third molars were randomly divided into 12 groups. Dentin was exposed and etched with the respective etchants (35% aqueous phosphoric acid and gel, 10 and 5% aqueous phosphoric and maleic acids). A water- and an acetone-based adhesive were applied to moist dentin and sealed with resin composite. Four longitudinal 1-mm sections were obtained; two sections were first deproteinized in 5.25% NaOCl and all four were critical point dried. Hybrid layer thickness and the degree of resin penetration were determined under the SEM and statistically analyzed.5 and 10% acids produced a significantly thinner HL with both adhesives and a significantly greater degree of resin penetration with SBMP (p&lt;0.05). Under the SEM, well-defined hybrid layers were seen with resin tag formation. Deproteinized sections demonstrated an uninfiltrated layer between the adhesive and the underlying dentin for both adhesive resins in all etchant groups.
Notes: Source: Masters Abstracts International, Volume: 45-03, page: 1443.

Thesis (M.Sc.)--University of Toronto, 2006.

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