title: Influence of acid-etching and ceramic primers on the repair of a glass ceramic.
abstract: The objective of this study was to evaluate the influence of different primers on the microtensile bond strength (μTBS) between a feldspathic ceramic and two composites. Forty blocks (6.0 x 6.0 x 5.0 mm³) were prepared from Vita Mark II . After polishing, they were randomly divided into 10 groups according to the surface treatment: Group 1, hydrofluoric acid 10% (HF) + silane; Group 2, CoJet + silane; Group 3, HF + Metal/Zirconia Primer; Group 4, HF + Clearfil Primer; Group 5, HF + Alloy Primer; Group 6, HF + V-Primer; Group 7, Metal/Zirconia Primer; Group 8, Clearfil Primer; Group 9, Alloy Primer; Group 10, V-Primer. After each surface treatment, an adhesive was applied and one of two composite resins was incrementally built up. The sticks obtained from each block (bonded area: 1.0 mm² ± 0.2 mm) were stored in distilled water at 37 degrees C for 30 days and submitted to thermocycling (7,000 cycles; 5 degrees C/55 degrees C ± 1 degree C). The μTBS test was carried out using a universal testing machine (1.0 mm/min). Data were analyzed using ANOVA and a Tukey test (a = 0.05). The surface treatments significantly affected the results (P < 0.05); no difference was observed between the composites (P > 0.05). The bond strength means (MPa) were as follows: Group 1a = 29.6; Group 1b = 33.7; Group 2a = 28.9; Group 2b = 27.1; Group 3a = 13.8; Group 3b = 14.9; Group 4a = 18.6; Group 4b = 19.4; Group 5a = 15.3; Group 5b = 16.5; Group 6a = 11; Group 6b = 18; Groups 7a to 10b = 0. While the use of primers alone was not sufficient for adequate bond strengths to feldspathic ceramic, HF etching followed by any silane delivered higher bond strength.
authors.affiliation: Sao Jose dos Campos Dental School, Sao Paulo State University, Sao Jose dos Campos, Sao Paulo, Brazil.
authors.forename: J R C
authors.initials: JR
authors.lastname: Queiroz
authors.forename: Rodrigo O A
authors.initials: RO
authors.lastname: Souza
authors.forename: L
authors.initials: L
authors.lastname: Nogueira Junior
authors.forename: M
authors.initials: M
authors.lastname: Ozcan
authors.forename: M A
authors.initials: MA
authors.lastname: Bottino
mesh_terms: D000134:Acid Etching, Dental / Q000379:methods*; D000538:Aluminum Silicates / Q000737:chemistry; D002516:Ceramics / Q000737:chemistry*; D003188:Composite Resins / Q000737:chemistry; D001840:Dental Bonding; D003764:Dental Materials / Q000737:chemistry*; D003775:Dental Polishing / Q000379:methods; D003776:Dental Porcelain / Q000737:chemistry; D017269:Dental Prosthesis Repair; D003799:Dental Stress Analysis / Q000295:instrumentation; D006801:Humans; D006858:Hydrofluoric Acid / Q000737:chemistry; D008422:Materials Testing; D008689:Methacrylates / Q000737:chemistry; D008855:Microscopy, Electron, Scanning; D017680:Potassium Compounds / Q000737:chemistry; D019279:Resin Cements / Q000737:chemistry; D012821:Silanes / Q000737:chemistry; D013314:Stress, Mechanical; D013499:Surface Properties; D013696:Temperature; D013718:Tensile Strength; D013871:Thiones / Q000737:chemistry; D013997:Time Factors; D014227:Triazines / Q000737:chemistry; D014867:Water / Q000737:chemistry
chemical_list: C521707:Alloy Primer; D000538:Aluminum Silicates; D003188:Composite Resins; D003764:Dental Materials; C474035:Filtek Supreme; D008689:Methacrylates; D017680:Potassium Compounds; D019279:Resin Cements; C084018:Scotchbond Multi-Purpose; D012821:Silanes; D013871:Thiones; D014227:Triazines; C107059:V-Primer; C082340:Vita Mark II; D014867:Water; D003776:Dental Porcelain; C016447:feldspar; C100646:Metal Primer; C023506:Glass ceramics; D006858:Hydrofluoric Acid