title: Improving adhesion between luting cement and zirconia-based ceramic with an alternative surface treatment.
abstract: This study evaluated the influence of an alternative surface treatment on the microshear bond strength (μsbs) of zirconia-based ceramic. Thirty-five zirconia disks were assigned to five groups according to the following treatments: Control (CO), glass and silane were not applied to the zirconia surface; G1, air blasted with 100μm glass beads + glaze + silane; G2, a gel containing 15% (by weight) glass beads applied to the ceramic surface + glaze + silane; G3, a gel containing 25% (by weight) glass beads applied to the ceramic surface + glaze + silane; and G4, a gel containing 50% (by weight) glass beads applied to the ceramic surface + glaze + silane. The specimens were built up using RelyX ARC®, according to the manufacturer's recommendations, and inserted in an elastomeric mold with an inner diameter of 0.8 mm. The μsbs test was performed using a testing machine at a crosshead speed of 0.5 mm/min. ANOVA and Tukey's test (p < 0.05) were applied to the bond strength values (in MPa). CO (15.6 ± 4.1) showed the lowest μsbs value. There were no statistical differences between the G1 (24.9 ± 7.4), G2 (24.9 ± 2.3), G3 (35.0 ± 10.3) and G4 (35.3 ± 6.0) experimental groups. Those groups submitted to surface treatments with higher concentrations of glass showed a lower frequency of adhesive failures. In conclusion, the glass application improved the interaction between the ceramic and the luting cement.
authors: Department of Restorative Dentistry, Piracicaba Dental School, Universidade Estadual de Campinas, Piracicaba, SP, Brazil.
authors: Aurealice Rosa Maria
authors: AR
authors: Martins
authors: Department of Restorative Dentistry, Piracicaba Dental School, Universidade Estadual de Campinas, Piracicaba, SP, Brazil.
authors: Valéria Bisinoto
authors: VB
authors: Gotti
authors: Department of Mechanical Engineering, School of Engeneering, Universidade Federal do Triângulo Mineiro, Uberaba, MG, Brazil.
authors: Marcos Massao
authors: MM
authors: Shimano
authors: Biomaterials Division, School of Dentistry, Universidade de Uberaba, Uberaba, MG, Brazil.
authors: Gilberto Antônio
authors: GA
authors: Borges
authors: Biomaterials Division, School of Dentistry, Universidade de Uberaba, Uberaba, MG, Brazil.
authors: Luciano de Souza
authors: Lde S
authors: Gonçalves
mesh_terms: D000704:Analysis of Variance; D017438:Bisphenol A-Glycidyl Methacrylate / Q000737:chemistry; D002484:Cementation / Q000379:methods*; D002516:Ceramics / Q000737:chemistry*; D003738:Dental Cements / Q000737:chemistry*; D005898:Glass / Q000737:chemistry*; D008422:Materials Testing; D008855:Microscopy, Electron, Scanning; D011092:Polyethylene Glycols / Q000737:chemistry; D011109:Polymethacrylic Acids / Q000737:chemistry; D015203:Reproducibility of Results; D019279:Resin Cements / Q000737:chemistry; D033081:Shear Strength; D013314:Stress, Mechanical; D013499:Surface Properties; D015040:Zirconium / Q000737:chemistry*
chemical_list: D003738:Dental Cements; D011109:Polymethacrylic Acids; C462240:RelyX ARC; D019279:Resin Cements; D011092:Polyethylene Glycols; D017438:Bisphenol A-Glycidyl Methacrylate; D015040:Zirconium; C028541:zirconium oxide