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01-12-2006 | Original Article

Influence of ascorbic acid on bonding of peroxide-affected dentin and 4-META/MMA-TBB resin

Authors: S. Nomoto, A. Kameyama, T. Nakazawa, K. Yazaki, T. Amagai, E. Kawada, Y. Oda, Y. Hirai, T. Sato

Published in: Clinical Oral Investigations | Issue 4/2006

Abstract

The purpose of this study was to evaluate the tensile bond strength (TBS) to peroxide-exposed dentin. Furthermore, the effect of ascorbic acid (AA) on the bond strength of peroxide-exposed dentin was investigated. Extracted bovine dentin was exposed to 10% carbamide peroxide, 30% hydrogen peroxide, or distilled water for 30 min, then treated with 10% AA (0, 30, 90, and 180 min), and conditioned with 10% citric acid/3% ferric chloride. The polymethyl-methacrylate (PMMA) rod was bonded to the treated bovine dentin with 4-META/MMA-TBB resin. A minidumbbell-shaped bonded specimen was prepared from these bonded assemblies and the TBS was tested. The fractured surfaces were also observed with a scanning electron microscope. Exposure to peroxide before bonding significantly reduced bond strength. The application of AA to the peroxide-exposed dentin increased bond strength. On the other hand, an adverse effect of AA was found in distilled water-affected dentin. Extended resin fibers were partially seen in the peroxide-exposed dentin. In conclusion, peroxide reduced the bond strength, and the stronger the oxidation, the weaker the obtained bond. Antioxidation with AA recovered the bond strength, and this effect increased the longer the AA was applied.

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Title: Influence of ascorbic acid on bonding of peroxide-affected dentin and 4-META/MMA-TBB resin
Authors: S. Nomoto
A. Kameyama
T. Nakazawa
K. Yazaki
T. Amagai
E. Kawada
Y. Oda
Y. Hirai
T. Sato
Publication date: 01-12-2006
Publisher: Springer-Verlag
Published in: Clinical Oral Investigations / Issue 4/2006
Print ISSN: 1432-6981
Electronic ISSN: 1436-3771
DOI: https://doi.org/10.1007/s00784-006-0071-2

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Influence of ascorbic acid on bonding of peroxide-affected dentin and 4-META/MMA-TBB resin

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