title: Shear bond strength of indirect composite material to monolithic zirconia.
abstract: OBJECTIVE
  This study aimed to evaluate the effect of surface treatments on bond strength of indirect composite material (Tescera Indirect Composite System) to monolithic zirconia (inCoris TZI).
  
  
  METHODS
  Partially stabilized monolithic zirconia blocks were cut into with 2.0 mm thickness. Sintered zirconia specimens were divided into different surface treatment groups: no treatment (control), sandblasting, glaze layer & hydrofluoric acid application, and sandblasting + glaze layer & hydrofluoric acid application. The indirect composite material was applied to the surface of the monolithic zirconia specimens. Shear bond strength value of each specimen was evaluated after thermocycling. The fractured surface of each specimen was examined with a stereomicroscope and a scanning electron microscope to assess the failure types. The data were analyzed using one-way analysis of variance (ANOVA) and Tukey LSD tests (α=.05).
  
  
  RESULTS
  Bond strength was significantly lower in untreated specimens than in sandblasted specimens (P<.05). No difference between the glaze layer and hydrofluoric acid application treated groups were observed. However, bond strength for these groups were significantly higher as compared with the other two groups (P<.05).
  
  
  CONCLUSIONS
  Combined use of glaze layer & hydrofluoric acid application and silanization are reliable for strong and durable bonding between indirect composite material and monolithic zirconia.
authors.affiliation: Department of Prosthodontics, Faculty of Dentistry, University of Gaziantep, Gaziantep, Turkey.
authors.forename: Fatih
authors.identifier: 0000-0002-4818-8562
authors.initials: F
authors.lastname: Sari
authors.affiliation: Department of Prosthodontics, Faculty of Dentistry, University of Gaziantep, Gaziantep, Turkey.
authors.forename: Asli
authors.identifier: 0000-0002-1065-3262
authors.initials: A
authors.lastname: Secilmis
authors.affiliation: Department of Prosthodontics, Faculty of Dentistry, University of Adiyaman, Adiyaman, Turkey.
authors.forename: Irfan
authors.identifier: 0000-0002-4524-1129
authors.initials: I
authors.lastname: Simsek
authors.affiliation: Department of Restorative Dentistry, Faculty of Dentistry, University of Gaziantep, Gaziantep, Turkey.
authors.forename: Semih
authors.identifier: 0000-0001-9818-4853
authors.initials: S
authors.lastname: Ozsevik
keywords: Composite resin; Scanning electron microscopy; Shear strength; Surface properties; Zirconia