title: Effect of Different Surface Treatments on Porcelain-Resin Bond Strength.
abstract: OBJECTIVE
  The aim of this study was to evaluate the effects of various surface treatments on the surface structure and shear bond strength (SBS) of different ceramics.
  
  
  METHODS
  A total of 192 disk-shaped cores were prepared using two all-ceramic systems, of which 168 were submitted to SBS tests, and 24 were investigated by scanning electron microscopy (SEM) and atomic force microscopy (AFM). The ceramics used were IPS Empress e.max (EX) lithium glass-ceramic and Vita In-Ceram Zirconia glass-infiltrated zirconia (ICZ). The specimens were randomly divided into seven groups (n = 12) on the basis of the surface treatment used: control; SB-sandblasting with 50 μm Al2O3particles; CJ-chairside silica coating with 30 μm SiO2particles and silanization (Clearfil Porcelain Bond Activator); HF-etching in 5% hydrofluoric acid and silanization; ER-etching with an Er:YAG laser (10 W); ND-Nd:YAG laser etching (0.8 W); and FS-etching with a femtosecond laser (860 mW). A luting cement (Clearfil Esthetic) was photopolymerized on each treated ceramic disk. After subjecting the specimens to thermocycling (1000 cycles, 5°C to 55°C), SBS tests were performed using a universal testing machine. The data were analyzed with two-way ANOVA and Tukey's tests using a significance limit of 5%.
  
  
  RESULTS
  Among the EX ceramics, the CJ (29.10 MPa) and HF (26.07 MPa) specimens had statistically higher SBS values. For the ICZ ceramics, the highest value (28.08 MPa) was obtained for the CJ specimens.
  
  
  CONCLUSIONS
  Silanization after coating with silica improves the bond strengths of both EX and ICZ specimens, while HF etching is favorable only for the EX specimens.
authors.affiliation: Department of Prosthodontics, Faculty of Dentistry, Abant Izzet Baysal University, Bolu, Turkey.
authors.forename: Tevfik
authors.initials: T
authors.lastname: Yavuz
authors.affiliation: Department of Prosthodontics, Faculty of Dentistry, İstanbul Medipol University, İstanbul, Turkey.
authors.forename: Özgün Yusuf
authors.initials: ÖY
authors.lastname: Özyılmaz
authors.affiliation: Department of Prosthodontics, Faculty of Dentistry, Sifa University, Izmir, Turkey.
authors.forename: Erhan
authors.initials: E
authors.lastname: Dilber
authors.affiliation: Department of Prosthodontics, Faculty of Dentistry, Selcuk University, Konya, Turkey.
authors.forename: Elif Sümeyye
authors.initials: ES
authors.lastname: Tobi
authors.affiliation: Department of Physics, Faculty of Science, Selcuk University, Konya, Turkey.
authors.forename: Hamdi Şükür
authors.initials: HŞ
authors.lastname: Kiliç
mesh_terms: D020906:Air Abrasion, Dental; D001840:Dental Bonding / Q000379:methods*; D045662:Dental Etching / Q000379:methods; D003776:Dental Porcelain; D003799:Dental Stress Analysis; D006801:Humans; D018625:Microscopy, Atomic Force; D008855:Microscopy, Electron, Scanning; D019279:Resin Cements / Q000627:therapeutic use*; D033081:Shear Strength; D013499:Surface Properties
chemical_list: D019279:Resin Cements; D003776:Dental Porcelain
keywords: Laser etching; glass-ceramic; silica coating; zirconia