title: Evaluation of shear bond strength of zirconia bonded to dentin after various surface treatments of zirconia.
abstract: Establishing a reliable bond of resin cement to zirconia based materials has been a major limitation against zirconia restoration.
  
  
  OBJECTIVE
  This study evaluated the shear bond strength of zirconia bonded to dentin specimens using a self etch dual cure resin cement after various surface treatments of zirconia. Twenty zirconia rods (3 × 2.5 mm) were prepared from zirconia blocks and assigned into 5 groups for the following surface treatments. (1) Group I: Control (C) no treatment (2) Group II: airborne-particle abrasion (APA), (3) Group III: hydrofluoric acid etching (HF), (4) Group IV: hydrofluoric acid etching followed by silanation (HF/S), and (5) Group V: application of zirconia primer (Z). Dentin Specimens were prepared from extracted molars stored in 0.5% chloramine-T. Zirconia rods were bonded to dentin using resin cement (Multilink Speed), then light polymerized. The specimens tested for failure were tested using the notched shear bond test method in a universal loading apparatus. One way ANOVA followed by Tukey HSD for cell means were used to analyze the data (=0.05). The highest values were obtained with group V (Z) (8.66 MPa) followed by group II (APA) (6.71 MPa), and group IV (HF/S) (4.41 MPa). The least values were obtained for group III (HF) (3.88 MPa) with no significant difference (P value 0.53) between group III (HF) (3.88 MPa) and group I (C) (3.70 MPa). Among the surface treatments employed in this study zirconia primer application is a practical procedure to improved bond strength of zirconia to resin cement followed by Airborne Particle Abrasion with 50 μm Al2O3 particles.
authors.affiliation: Deptartment of Prosthodontics, Rajah Muthiah Dental College & Hospital, Annamalai University, Chidambaram, 608002 Tamil Nadu India.
authors.forename: Subash M
authors.initials: SM
authors.lastname: Reddy
authors.affiliation: Deptartment of Prosthodontics, Rajah Muthiah Dental College & Hospital, Annamalai University, Chidambaram, 608002 Tamil Nadu India.
authors.forename: D
authors.initials: D
authors.lastname: Vijitha
authors.affiliation: Deptartment of Prosthodontics, Rajah Muthiah Dental College & Hospital, Annamalai University, Chidambaram, 608002 Tamil Nadu India.
authors.forename: T
authors.initials: T
authors.lastname: Deepak
authors.affiliation: Deptartment of Prosthodontics, Rajah Muthiah Dental College & Hospital, Annamalai University, Chidambaram, 608002 Tamil Nadu India.
authors.forename: R
authors.initials: R
authors.lastname: Balasubramanian
authors.affiliation: Deptartment of Prosthodontics, Rajah Muthiah Dental College & Hospital, Annamalai University, Chidambaram, 608002 Tamil Nadu India.
authors.forename: A
authors.initials: A
authors.lastname: Satish
keywords: Bond strength of Zirconia; Surface treatment of Zirconia; Zirconia