Effect of Polymerization Accelerator on Bond Strength to Eugenol-Contaminated Dentin.
J Adhes Dent
; 20(6): 541-547, 2018.
Article
em En
| MEDLINE
| ID: mdl-30564801
ABSTRACT
PURPOSE:
To evaluate the effect of a polymerization accelerator on the microtensile bond strength (µTBS) of etch-and-rinse and self-etch adhesives to eugenol-contaminated dentin. MATERIALS ANDMETHODS:
Sixty flat dentin surfaces were prepared from human molars. Half of the specimens were restored with zinc oxide eugenol temporary cement (IRM) (eugenol-contaminated group) and the other half remained without restoration (control group). After 24-h storage, the cement was mechanically removed. Then the specimens in each group were further divided into three subgroups based on the application procedure of a polymerization accelerator (p-toluenesulfinic acid sodium salt; Accel) no application, 10-s application, or 30-s application. After air drying, the dentin surfaces were bonded with either a three-step etch-and-rinse adhesive (OptiBond FL) or a two-step self-etch adhesive (Clearfil SE Bond) and restored with composite. After 24-h water storage, the bonded specimens were subjected to the µTBS test. Data were analyzed by three-way ANOVA and Dunnett's T3 test (p < 0.05).RESULTS:
The eugenol-contaminated groups had significantly lower µTBS than the control groups with both types of adhesives (p < 0.05), and the application of Accel significantly increased the compromised µTBS to eugenol-contaminated dentin. Optibond FL presented significantly higher µTBS to eugenol-contaminated dentin than did Clearfil SE Bond (p < 0.05).CONCLUSION:
The application of a polymerization accelerator on eugenol-contaminated dentin prior to adhesive resin application increased the µTBS of both the three-step etch-and-rinse and two-step self-etch adhesive.Palavras-chave
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Base de dados:
MEDLINE
Assunto principal:
Resistência à Tração
/
Eugenol
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Colagem Dentária
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Cimentos Dentários
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Lâmpadas de Polimerização Dentária
Idioma:
En
Ano de publicação:
2018
Tipo de documento:
Article