Artigo
Activation Mode Effects on the Shear Bond Strength of Dual-cured Resin Cements
Registro en:
Autorização para publicação no Repositório Institucional da Universidade Federal de Sergipe (RIUFS) concedida pelo editor
Autor
Faria e Silva, André Luis
Fabião, Mayra Melo
Arias, Vanessa Gallego
Martins, Luis Roberto Marcondes
Institución
Resumen
Objectives: This study evaluated the immediate (10-minute) and delayed (24-hour) bond strength of dual-cured resin cements that are light-activated either immediately or delayed (after five
minutes) or chemically-activated only. Materials and Methods: Three dual-cured resin cements were evaluated: RelyX ARC, Panavia F and Enforce. Cylinders of resin cement were built up over resin composite blocks following the manufacturers’ instructions for each luting agent. The cements were mixed, inserted into the molds and light-activated either immediately or after five minutes (delayed light activation). When no light
activation was performed, the materials were
protected from light exposure until testing. Half of the samples were tested at 10 minutes; the remaining samples were stored at 100% relative humidity for 4 hours when they were then test ed (n=10). Data were submitted to three-way
ANOVA and post-hoc Tukey’s tests (α=0.05). The
failure mode was evaluated under SEM. Results:
RelyX ARC presented the highest values of shear bond strength, followed by Enforce. Panavia F showed the lowest values. Both immediate and delayed light activation caused the cements to present the highest means of shear bond strength. There was an improvement in bond strength after 24 hours of storage. Conclusions: RelyX ARC produced the highest bond strength, which was improved by light activation and storage for 24 hours.