Active application of primer acid on acid-treated enamel: Influence on the bond effectiveness of self-etch adhesives systems

作者：Pimenta Araujo Cintia Tereza; Prieto Lucia Trazzi; Costa Daiane Cristianismo; Bosso Mariana Avalone; Coppini Erick Kamiya; Santos Dias Carlos Tadeu; Maffei Sartini Paulillo Luis Alexandre

来源：Microscopy Research and Technique, 2017, 80(8): 943-949.

DOI：10.1002/jemt.22887

• application mode
• bond strength
• enamel
• self-etch adhesive

Aim: Evaluate the composite-to-enamel bond after passive or active application of self-etching primer systems on polished or pre-etched enamel with phosphoric acid. Materials and Methods: Two self-etch adhesives systems (SEAS) were used: Clearfil SE Bond and Easy Bond. Third human molars were divided into 8 groups (N=10). The crown of each tooth was sectioned into halves and the mesial/distal surfaces were used. The adhesives were actively or passively applied on enamel with or without prior phosphoric-acid etching. Resin composite cylinders were built after adhesive application. After stored in relative humidity for 24 hr/37 degrees C the specimens were subjected to microshear test in universal testing a machine at a crosshead speed of 0.5 mm/minute. The results were analyzed with three-way ANOVA and the Tukey test. The enamel-etching pattern was evaluated under SEM. Results: The 2-step SEAS system presented significantly higher adhesive bond strength means (47.37 MPa) than the 1-step (36.87 MPa). A poor enamel- etching pattern was observed in active mode showing irregular and short resin tags, however there was not compromised the bond strength. Conclusion: Active or passive application produced similar values of bond strength to enamel regardless of enamel pretreatment and type of SEAS.

• 出版日期2017-8