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Effect of two-step adhesive systems on inhibition of secondary caries around fluoride-releasing resin composite restorations in root dentine

Lookup NU author(s): Professor John McCabe

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Abstract

Objective. The purpose of this study was to investigate the effect of two-step adhesive systems on secondary caries inhibition around fluoride-releasing materials in vitro. Methods. Two self-etching primer systems, Clearfil SE Bond (SE) and UniFil Bond (UB), and two one-bottle systems with a totat-etch wet-bonding technique, Single Bond (SB) and One-Step (OS), were used prior to placement of resin composites either with (Reactmer) or without (Z100) fluoride release. Class V cavities prepared in extracted human premolars were restored with various combinations of materials: Reactmer/SE, Reactmer/UB, Reactmer/SB, Reactmer/OS, Z100/SE, Z100/UB, Z100/SB and Z100/OS. After storage for 14 days, the restored teeth were incubated in bacterial medium containing sucrose with Streptoccus mutans for 2 weeks. Water sorption and desorption of the adhesives and fluoride release from the resins either coated with adhesive or uncoated were also determined. Results. The one-bottle groups showed higher water sorption and desorption than the self-etching primer groups. Although fluoride release from the Reactmer specimens was suppressed by the adhesive coating, the one-bottle groups allowed significantly higher fluoride release than the self-etching primer groups. On microradiographs, the radio-opaque layers adjacent to the Reactmer restorations were thick and clear, white the layers adjacent to the Z100 restorations were thin and unclear. For the Reactmer restorations, the radio-opaque Layers associated with the one-bottle groups were significantly thicker than for the self-etching primer groups. Conclusions. These results indicated that the use of one-bottle wet-bonding systems for bonding of fluoride-releasing resin composites to dentine may contribute to inhibit secondary caries compared to self-etching primer systems. (C) 2004 Elsevier Ltd. All rights reserved.

Publication metadata

Author(s): Itota T, Nakabo S, Narukami T, Tashiro Y, Torii Y, McCabe JF, Yoshiyama M

Publication type: Article

Publication status: Published

Journal: Journal of Dentistry

Year: 2005

Volume: 33

Issue: 2

Pages: 147-154

ISSN (print): 0300-5712

ISSN (electronic): 1879-176X

Publisher: Elsevier Ltd

URL: http://dx.doi.org/10.1016/j.jdent.2004.09.003

DOI: 10.1016/j.jdent.2004.09.003

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