The effects of high concentration tooth whitening bleaches on microleakage of class v composite restorations

Malgorzata A. Klukowska, Donald J. White, Roger D. Gibb, Franklin Garcia-Godoy, Cristina Garcia-Godoy, Heinz Duschner

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

Objective: To explore the effects of high-concentration hydrogen peroxide bleaching agents on the microleakage of composite restorations. Methods: In 60 extracted human molars, Class V restorations were prepared with Scotchbond™ 1/Filtek Z250 composite. Teeth were randomly divided into four groups: (1) no bleaching; (2) bleaching with 14% hydrogen peroxide gel from Crest® Whitestrips™; (3) bleaching with 20% carbamide peroxide gel from Opalescence® PF 20; and (4) bleaching with 38% hydrogen peroxide gel Opalescence® Xtra Boost. Bleaching procedures were carried out at 37°C for 21 days/42 hours (2); seven days/42 hours (3); one day/45 minutes (4). Varnish was applied on the apical portion of the teeth only, excluding the restoration, prior to immersion in a 0.1% rhodamin-B-isothiocyanate solution for 24 hours at 37°C. After rinsing, specimens were embedded in methacrylate blocks, and sectioned with a water-cooled microtome with three restoration cuts positioned centrally parallel to the long axis of the tooth. Microleakage was evaluated at the occlusal margins of the Class V restorations using a stereo microscope, separate for dentin and enamel margins. Results: Over 90% of enamel margins exhibited no microleakage following cycling. Bleaching agents had almost no effect on numerical averages. Eighty-eight percent of the dentin margins were free of microleakage for the non-treated control group. Bleaching treatments collectively had slight numerical reductions to around 80%. The statistical evaluation (Kruskal-Wallis-test) showed no significant difference in microleakage between groups for enamel or dentin. Conclusion: Bleaching with the materials tested had no influence on microleakage of Filtek Z250 composite bonded with Scotchbond 1.

Original languageEnglish (US)
Pages (from-to)14-17
Number of pages4
JournalJournal of Clinical Dentistry
Volume19
Issue number1
StatePublished - Apr 21 2008
Externally publishedYes

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Tooth Bleaching
Dentin
Dental Enamel
Bleaching Agents
Hydrogen Peroxide
Tooth
Gels
Paint
Methacrylates
Immersion
Control Groups
Water
Iridescence
Filtek Z250
Scotchbond

All Science Journal Classification (ASJC) codes

  • Dentistry(all)

Cite this

Klukowska, M. A., White, D. J., Gibb, R. D., Garcia-Godoy, F., Garcia-Godoy, C., & Duschner, H. (2008). The effects of high concentration tooth whitening bleaches on microleakage of class v composite restorations. Journal of Clinical Dentistry, 19(1), 14-17.

The effects of high concentration tooth whitening bleaches on microleakage of class v composite restorations. / Klukowska, Malgorzata A.; White, Donald J.; Gibb, Roger D.; Garcia-Godoy, Franklin; Garcia-Godoy, Cristina; Duschner, Heinz.

In: Journal of Clinical Dentistry, Vol. 19, No. 1, 21.04.2008, p. 14-17.

Research output: Contribution to journalArticle

Klukowska, MA, White, DJ, Gibb, RD, Garcia-Godoy, F, Garcia-Godoy, C & Duschner, H 2008, 'The effects of high concentration tooth whitening bleaches on microleakage of class v composite restorations', Journal of Clinical Dentistry, vol. 19, no. 1, pp. 14-17.
Klukowska, Malgorzata A. ; White, Donald J. ; Gibb, Roger D. ; Garcia-Godoy, Franklin ; Garcia-Godoy, Cristina ; Duschner, Heinz. / The effects of high concentration tooth whitening bleaches on microleakage of class v composite restorations. In: Journal of Clinical Dentistry. 2008 ; Vol. 19, No. 1. pp. 14-17.
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abstract = "Objective: To explore the effects of high-concentration hydrogen peroxide bleaching agents on the microleakage of composite restorations. Methods: In 60 extracted human molars, Class V restorations were prepared with Scotchbond™ 1/Filtek Z250 composite. Teeth were randomly divided into four groups: (1) no bleaching; (2) bleaching with 14{\%} hydrogen peroxide gel from Crest{\circledR} Whitestrips™; (3) bleaching with 20{\%} carbamide peroxide gel from Opalescence{\circledR} PF 20; and (4) bleaching with 38{\%} hydrogen peroxide gel Opalescence{\circledR} Xtra Boost. Bleaching procedures were carried out at 37°C for 21 days/42 hours (2); seven days/42 hours (3); one day/45 minutes (4). Varnish was applied on the apical portion of the teeth only, excluding the restoration, prior to immersion in a 0.1{\%} rhodamin-B-isothiocyanate solution for 24 hours at 37°C. After rinsing, specimens were embedded in methacrylate blocks, and sectioned with a water-cooled microtome with three restoration cuts positioned centrally parallel to the long axis of the tooth. Microleakage was evaluated at the occlusal margins of the Class V restorations using a stereo microscope, separate for dentin and enamel margins. Results: Over 90{\%} of enamel margins exhibited no microleakage following cycling. Bleaching agents had almost no effect on numerical averages. Eighty-eight percent of the dentin margins were free of microleakage for the non-treated control group. Bleaching treatments collectively had slight numerical reductions to around 80{\%}. The statistical evaluation (Kruskal-Wallis-test) showed no significant difference in microleakage between groups for enamel or dentin. Conclusion: Bleaching with the materials tested had no influence on microleakage of Filtek Z250 composite bonded with Scotchbond 1.",
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