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has been cited by the following article:

• TITLE: Characterization and Evaluation of Bond Strength of Dental Polymer Systems Modified with Hydroxyapatite Nanoparticles

  AUTHORS: Vitor César Dumont, Rafael Menezes Silva, Luiz Edmundo Almeida-Júnior, Juan Pedro Bretas Roa, Adriana Maria Botelho, Maria Helena Santos

  KEYWORDS: Nanostructures; Composites; Mechanical Properties; Fracture

  JOURNAL NAME: Journal of Materials Science and Chemical Engineering, Vol.1 No.7, December 31, 2013

  ABSTRACT: The study modifies an adhesive system with hydroxyapatite nanoparticles as load, characterizing it and evaluate the effectiveness of its bond to dental structure. The middle thirds of healthy premolar tooth crowns were obtained, and each crown was sectioned vertically, resulting in two sections. The sections were divided into ten groups (n = 15), in which resin composite restorations were simulated: (G1E and G1D) conventional adhesive system (SAC); (G2E and G2D) SAC modified with HAP; (G3E and G3D) Primer modified with HAP; (G4E and G4D) monocomponent adhesive system; (G5E and G5D) self-etching adhesive system. The specimens were submitted to the microshear test and characterization technique. There was statistically significant difference (Kruskal-Wallis) between the groups (p 0.01). G3 presented the highest bond strength to enamel (64.40 MPa, ±7.36) and dentin (39.59 MPa, ±21.46). The majority of specimens were found adhesive fractures. Bond strength to enamel and dentin of the primer modified with HAP of SAC showed higher values.