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 language | English (US) |
|---|---|
| Pages (from-to) | 33-36 |
| Number of pages | 4 |
| Journal | Dental Materials |
| Volume | 10 |
| Issue number | 1 |
| DOIs | |
| State | Published - Jan 1994 |
ASJC Scopus subject areas
- Materials Science(all)
- Dentistry(all)
- Mechanics of Materials