The effects of peroxide bleaching on composite to enamel bond strength

Michael V. Dishman, David A. Covey, Linda W. Baughan

Research output: Contribution to journalArticle

161 Scopus citations

Abstract

Objectives. The objective of this in vitro study was to evaluate the effects of an in-office type of bleaching regimen on the composite to enamel bond. Methods. The enamel on forty extracted human teeth was subjected to a 25% hydrogen peroxide bleaching treatment. Ten additional unbleached specimens served as controls (Group A). The 40 bleached specimens were divided into four equal groups (Groups B-E). Composite cylinders were bonded to the prepared surfaces at various time intervals following bleaching. Group B was bonded immediately, Group C at 1 d, Group D at 1 wk, and Group E at 1 mon post-bleaching. Results. Mean shear bond strength values showed a significant decrease in bond strength for Group B. However, the bond strength returned to normal values after 1 d and remained normal for at least 1 mon. Scanning electron microscope examination showed an apparent decrease in the number of resin tags present in the enamel/composite interface for Group B compared with the other groups including controls. Significance. Polymerization inhibition of the resin bonding agent is the likely mechanism for the effects of the bleaching on bond strength.

Original languageEnglish (US)
Pages (from-to)33-36
Number of pages4
JournalDental Materials
Volume10
Issue number1
DOIs
StatePublished - Jan 1994

ASJC Scopus subject areas

  • Materials Science(all)
  • Dentistry(all)
  • Mechanics of Materials

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