To study the effect of accelerated aging on zirconia-based (Zr) dental materials. Methods: Discs (d=13.0mm; h=1.2±0.2mm) were prepared from three Zr materials and sintered as per manufacturers' instructions: (1) IPS e.max ZirCAD (IPS), Ivoclar Vivadent; (2) LAVA, 3MESPE; (3) NanoZR (Matsushita Electric Works). Specimens were aged at 134oC under 2 bar for 5h (Chevalier et al., 2007). Control disks were left in distilled water. Specimens were analyzed with XRD and FRX-WDS. The XRD patterns were recorded on a Rigaku Dmax III-C 3kW diffractometer, using CuKa radiation at 40 kV and 30mA settings in the 2θ range from 20 to 65o. The crystalline phases were identified by comparing the peak positions and intensities with those listed in the JCPDS files. For elemental analysis a Panalytical XRF-WDS 4 kW AXIOS sequential spectrometer (Rh X-ray tube) under He flow was used. Standardless semi-quantitative analysis was performed using the SuperQ IQ+ software package.
|Publication status||Published - 1 Jan 2010|