Shear bond strength between veneering ceramics and ceria-stabilized zirconia/alumina

Fischer, Jens; Stawarczyk, Bogna; Sailer, Irena; Hämmerle, Christoph H.F.

doi:10.1016/S0022-3913(10)60056-X

« Previous Next »Journal of Prosthetic Dentistry
Volume 103, Issue 5 , Pages 267-274, May 2010

Shear bond strength between veneering ceramics and ceria-stabilized zirconia/alumina

Jens Fischer, Dr med dent, Dr rer nat, PhD
- Associate Professor, Clinic for Fixed and Removable Prosthodontics and Dental Materials Science, Center for Oral and Maxillofacial Medicine, University of Zurich, Zurich, Switzerland
- Corresponding author: Dr Jens Fischer, Department of Dental Materials Science, Clinic for Fixed and Removable Prosthodontics, Center for Dental and Oral Medicine, University of Zurich, Plattenstrasse 11, CH-8032 Zurich, SWITZERLAND, Fax: +41 44 634 43 05
Bogna Stawarczyk, Dipl-Ing MSc
- Temporary Head of Materials Science, Clinic for Fixed and Removable Prosthodontics and Dental Materials Science, Center for Oral and Maxillofacial Medicine, University of Zurich, Zurich, Switzerland
Irena Sailer, Dr med dent
- Associate Professor, Clinic for Fixed and Removable Prosthodontics and Dental Materials Science, Center for Oral and Maxillofacial Medicine, University of Zurich, Zurich, Switzerland
Christoph H.F. Hämmerle, Prof Dr med dent
- Professor and Chair, Clinic for Fixed and Removable Prosthodontics and Dental Materials Science, Center for Oral and Maxillofacial Medicine, University of Zurich, Zurich, Switzerland

Statement of problem

Ceria-stabilized tetragonal ZrO₂/Al₂O₃ nanocomposite (Ce-TZP/A) offers superior properties compared to yttria-stabilized zirconia (Y-TZP). However, the bond quality to veneering ceramics has not been investigated.

Purpose

The purpose of this study was to evaluate the bond strength of different veneering ceramics to Ce-TZP/A.

Material and methods

Cubes of Ce-TZP/A (NANOZR) (edge length, 10 mm) were layered with veneering ceramics (5 mm in thickness) with or without application of a liner and sheared at the interface. The effect of different surface treatments (polished with 3-μm diamond paste or airborne-particle abraded) was evaluated with 1 veneering ceramic (Cerabien ZR). Shear bond strength of 5 additional veneering ceramics (IPS e.max, Initial ZR, Triceram, Vintage ZR, or VITA VM 9) to polished Ce-TZP/A was measured (n=10). Polished Y-TZP (Hint-ELs ZrO₂ HIP) veneered with 2 ceramics (Cerabien ZR, Vintage ZR) served as the control. Mean shear bond strength values (MPa) were calculated. The means were statistically analyzed with 2-way ANOVA for the effect of surface treatment and liner, 2-way ANOVA for the effect of different veneering ceramic brands and liner, and 3-way ANOVA for the effect of substrate, veneering ceramic brands, and liner, as well as 1-way ANOVA for the differences between the veneering ceramics. A post hoc Scheffé test was used (α=.05).

Results

The effects of surface treatment (P=.007) or application of liner (P<.001) were significant. Shear bond strength with different veneering ceramics showed bond strength values with means ranging between 14.2 ±1.7 MPa (IPS e.max with liner) and 27.5 ±4.2 MPa (VITA VM 9). A significant difference was found between the results of shear bond tests with Y-TZP and Ce-TZP/A (P=.022). The application of a liner on Y-TZP had no significant effect.

Conclusions

Airborne-particle abrasion is not necessary to enhance the shear bond strength of the evaluated veneering ceramics to Ce-TZP/A. Liners impair the shear bond strength of veneering ceramics to Ce-TZP/A.