title: [Effect of surface hot-etching treatment on zirconia/resin bonding strength].
abstract: OBJECTIVE
  To evaluate the effect of hot-etching pretreatment of surface of zirconia on the shear bond strength of interface between zirconia and the two different resin cements.
  
  
  METHODS
  Smooth enamel surfaces of fresh extracted human teeth and zirconia discs were prepared, and the surface of zirconia discs were treated with the following different methods: no treatment, airborne particle abrasion with 50 μm Al2O3 particles, hot-etching treatment for 60 min. The surface morphology was observed with scanning electron microscope (SEM). Two commercial resin bond systems (Super Bond C&B and Panavia F2.0) were used to cement the zirconia discs to enamel surfaces according to the instruction. Shear bond test was conducted with universal testing machine at a crosshead speed of 1 mm/min. Single-factor ANOVA (analysis of variance) statistical analysis was performed to compare the differences of shear bond strengths between the groups (α=0.01).
  
  
  RESULTS
  The shear bond strengths of Super Bond group were (23.37±3.94) MPa, (25.95±3.05) MPa and (34.52±1.8) MPa respectively for no treatment, airborne particle abrasion, and hot-etching treatments. The shear bond strengths of Panavia group were (12.91±3.33) MPa, (14.00±3.28) MPa, and (18.47±4.16) MPa respectively for no treatment, airborne particle abrasion, and hot-etching treatments. The shear bond strengths were increased by hot-etching treatment compared with no treatment and airborne particle abrasion treatment (P<0.01).
  
  
  CONCLUSIONS
  The result indicated that the hot-etching technique could improve the shear bond strength between zirconia and resin cements.
authors.affiliation: Department of Prosthodontics, Peking University School and Hospital of Stomatology, Beijing 100081, China.
authors.forename: Pin
authors.initials: P
authors.lastname: Lv
authors.affiliation: Department of Prosthodontics, Peking University School and Hospital of Stomatology, Beijing 100081, China.
authors.forename: Ting
authors.initials: T
authors.lastname: Jiang
mesh_terms: D001840:Dental Bonding; D003738:Dental Cements; D003743:Dental Enamel; D006801:Humans; D019279:Resin Cements; D033081:Shear Strength; D013499:Surface Properties; D015040:Zirconium
chemical_list: D003738:Dental Cements; D019279:Resin Cements; C040201:Super C resin; D015040:Zirconium; C028541:zirconium oxide