J Korean Acad Conserv Dent.  2006 Mar;31(2):79-85. 10.5395/JKACD.2006.31.2.079.

Effect of vital tooth bleaching agent on dentin bonding

  • 1Department of Conservative Dentistry, School of Dentistry, Kyungpook National University, Korea. skykim@knu.ac.kr


To evaluate the effect of vital tooth bleaching agent and alcohol pretreatment on dentin bonding, flat dentin windows were produced on the buccal side of the crowns of fifty-five extracted, human premolars. A bleaching gel, Opalescence(R) with 10% of carbamide peroxide (Ultradent Product, USA) was daily applied on the teeth of three experimental groups for six hours for 10 consecutive days, while teeth of a control group were not bleached. After 6 hours of bleaching gel application, the specimens were washed and stored in saline until the next day application. After application of One-step(R) dentin bonding agent (Bisco, USA), Z-250(R) resin (3M-ESPE, USA) was bonded to dentin with a mount jig. Shear bond strength was measured with an Instron machine (Type 4202, Instron Corp., USA) after 24 hours. The results were analyzed using one-way ANOVA and Duncan's multiple range test at p < 0.05. Immediate bonding group showed significantly lower bond strength than un-bleached control group (p < 0.05). Ethanol-treated group showed significantly higher bond strength compared to immediate bonding group (p < 0.05). However, the bond strength of the ethanol treatment group was lower than that of the un-bleached control group (p < 0.05). There were no significant difference in shear bond strength between the 2-week delayed bonding group and the ethanol-treated group (p > 0.05) and between delayed bonding group and un-bleached control group (p > 0.05). In the condition of the present study, it seems that alcohol pretreatment after bleaching procedure can reduce the adverse effect of vital bleaching agent on dentin bonding.


Vital bleaching; Carbamide peroxide; Ethanol; Dentin bonding; Shear bond strength

MeSH Terms

Tooth Bleaching*


  • Figure 1 Schematic diagram of the test assembly for the measurement of shear bond strength.

  • Figure 2 Shear bond strength of resin composite to dentin surface (Mean ± S.D.). * Statistically significant (p < 0.05).


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