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Water Content in Self-Etching Primers Affects Their Aggressiveness and Strength of Bonding to Ground Enamel

2010; Taylor & Francis; Volume: 86; Issue: 9 Linguagem: Inglês

10.1080/00218464.2010.506161

1563-518X

Giana da Silveira Lima, Fabrício Aulo Ogliari, Rafael R. Moraes, Elisa S. Mattos, Adriana Fernandes da Silva, Neftalí Lênin Villarreal Carreño, César Liberato Petzhold, Evandro Piva,

Dental Research and COVID-19

In this study the influence of water concentration in self-etching (SE) primers on their aggressiveness and bond strength to ground enamel was investigated. Five experimental primers with 0, 5, 10, 20, or 40 wt% of water were formulated, using Clearfil SE Bond® (CSEB) as a commercial reference. Primers were applied to bovine incisors following application of bonding resin and composite restoration. Bond strength was evaluated through shear testing and data were statistically analyzed (5%). The etching aggressiveness was evaluated by SEM. Water concentration significantly affected bond strength and etching aggressiveness. The highest bond strength value (MPa) was found for the primer containing 20% of water (24.7), followed by CSEB (23.8). Groups containing 5% (20.5) and 10% (20.2) of water showed an intermediate performance, while the lowest values were observed for the 0% (17.3) and 40% (16.7) groups. SEM analysis showed increasing aggressiveness for increased water content.