Chemical bonding to novel translucent zirconias: A mechanical and molecular investigation
Journal article, 2019

Purpose:
To investigate direct bonding of a 10-MDP-based cement to two novel translucent yttria-stabilized tetragonal zirconia polycrystal ceramics (4Y-TZP, 5Y-TZP) and observe the influence of thermocycling on this bonding.

Materials and Methods:
Powders of presintered and isostatically pressed 5Y-TZP, 4Y-TZP and 3Y-TZP were mixed with a 10-MDP-based cement (Panavia F 2.0), then stored in deionized water for 48 h at 37°C or thermocycled 10,000 times. Raman spectroscopy and Fourier-transform infrared spectroscopy were used to assess the presence of a functional group (PO32-) that could indicate bonding before and after thermocycling. X-ray photoelectron spectroscopy was used to identify the presence of the suspected Zr-O-P bond in the same specimens. A shearbond strength (SBS) test was conducted based on ISO 29022:2013.

Results:
Marked peaks assigned to the asymmetric vibrations of the PO32- functional group were observed in both zirconias before and after thermocycling. The binding energy corresponding to Zr-O-P interactions (531.5 eV) was masked by the aluminosilicate in the filler of the cement. Shear bond strengths were approximately 20 MPa after water storage and approximately 6 MPa after thermocycling. No differences were found between the control group and the translucent zirconias.

Conclusion:
Direct bonding of the 10-MDP-based cement to both 4Y-TZP and 5Y-TZP was highly plausible. Both 4YTZP and 5Y-TZP may be promising alternatives to glass-ceramic restorations.

thermocycling

shear bond strength

chemical bond

10-MDP

translucent

zirconia.

Author

Sebestian Franco-Tabares

University of Gothenburg

Victoria Franke Stenport

University of Gothenburg

Lars Hjalmarsson

Mälar Hospital

University of Gothenburg

Uppsala University

Eric Tam

Chalmers, Industrial and Materials Science, Materials and manufacture

Carina B. Johansson

University of Gothenburg

Journal of Adhesive Dentistry

1461-5185 (ISSN)

Vol. 21 2 107-116 3453

Subject Categories

Dentistry

DOI

10.3290/j.jad.a42361

PubMed

30949624

More information

Latest update

11/22/2019