Chemical bonding to novel translucent zirconias: A mechanical and molecular investigation
Artikel i vetenskaplig tidskrift, 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.

shear bond strength

10-MDP

thermocycling

chemical bond

zirconia.

translucent

Författare

Sebestian Franco-Tabares

Sahlgrenska akademin

Victoria Franke Stenport

Sahlgrenska akademin

Lars Hjalmarsson

Sahlgrenska akademin

Mälar Hospital

Uppsala universitet

Eric Tam

Chalmers, Industri- och materialvetenskap, Material och tillverkning

Carina B. Johansson

Sahlgrenska akademin

Journal of Adhesive Dentistry

1461-5185 (ISSN)

Vol. 21 2 107-116 3453

Ämneskategorier

Odontologi

DOI

10.3290/j.jad.a42361

PubMed

30949624

Mer information

Senast uppdaterat

2019-08-06