An investigation of atomic force microscopy, surface topography and adhesion of luting cements to zirconia: effect of silica coating, zirconia primer and laser

Yildirim B., Kumbuloglu O. , Saracoglu A. , Husain N. A. , Ozcan M.

JOURNAL OF ADHESION SCIENCE AND TECHNOLOGY, vol.33, no.18, pp.2047-2060, 2019 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 33 Issue: 18
  • Publication Date: 2019
  • Doi Number: 10.1080/01694243.2019.1620670
  • Page Numbers: pp.2047-2060
  • Keywords: Adhesion, air-abrasion, laser, resin cements, shear bond strength, silica-coating, surface conditioning, zirconia, MICROTENSILE BOND STRENGTH, FIXED PARTIAL DENTURES, RESIN CEMENTS, CONDITIONING METHODS, PHOSPHATE MONOMER, ALUMINUM-OXIDE, CERAMICS, SHEAR, ABRASION, AGENTS


This study evaluated the effect various surface conditioning methods on the surface topography and adhesion of luting cements to zirconia. Zirconia blocks (N = 25) were randomly assigned to five groups according to the surface conditioning methods: (a) No conditioning, control (CON), (b) tribochemical silica coating (TSC), (c) MDP-based zirconia primer (ZRP), (d) coating with nano aluminum nitride (ALN) (e) etching with Er: YAG laser (LAS). The conditioned zirconia blocks were further divided into five subgroups to receive the luting cements: (a) MDP-based resin cement (Panavia F2.0) (PAN), (b) 4-META-based cement (Super Bond) (SUB), (c) UDMA-based (GCem) (GCE), (d) bis-GMA based (Bifix QM) (BIF) and (e) polycarboxylate cement (Poly-F) (POL). Cements were applied in polyethylene moulds (diameter: 3 mm; height: 2 mm). The bonded specimens were first thermocycled for 5500 cycles (5-55 degrees C) and then adhesive interface was loaded under shear (0.5 mm/min). The data (MPa) were analyzed using 2-way ANOVA, Tukey's and Bonneferroni tests (alpha = 0.05). Regardless of the cement type, TSC resulted in significantly higher bond strength (p < 0.05) (13.3 +/- 4.35-25.3 +/- 6.3) compared to other conditioning methods (2.96 +/- 1.5-5.4 +/- 5.47). Regardless of the surface conditioning method, no significant difference was found between MDP, 4-META and UDMA based cements (p > 0.05) being significantly higher than those of bis-GMA and polycarboxylate cements (p < 0.05). Failure types were frequently adhesive in all groups. Tribochemical silica coating provided superior bond results compared to other conditioning methods tested on zirconia especially in conjunction with UDMA- and 4-META-based resin cements.