Authors : Sahabi Mahasti, Fayaz Ali and Yaghmaie Kaveh
Abstract: In preparation of All-Ceram restorations with Zirconia Bases choosing appropriate cement with maximum strength and a proper method for decontamination of restoration surface in case of contamination to saliva is of great importance for the prognosis of the restoration. According to previous studies, Panavia F2 is the preferred cement for restoration of All-Ceram Zirconia based cements. Regarding the limited number of studies related to comparison of bond strength new cements with Panavia F2 and absence of data in respect to the effect of Air-abrasion on the bond strength, the aim of this study was to evaluate the bond strength of Panavia F2 and Rely XU100 to Cercon porcelain with and without Air-abrasion. About 12 porcelain blocks of 17.5x7x1.5 mm3 were prepared using CAD/CAM method. Specimens were divided into 2 groups of 6 blocks each (Air-abraded and non-Air-abraded) then 36 cylinders (0.6 mm2 x1 mm) of each resin cements were prepared according to the manufactures instructions. In each group, 18 specimens were bonded to the three Air-abraded and three non-air-abraded porcelain blocks. Cercon blocks bonded to resin cylinders were placed in the Micro shear bond strength tester and the data were recorded. The results were then analyzed with two-way Anova analysis using SPSS (version 11.5). The mean value of micro shear bond strength for Panavia F2 group bonded to Air-abraded and non Air-abraded Cercon blocks were 72.2 N (120 Mp) and 48.44 N (48 Mp) for Panavia F2 and 46.22 N (77.03 Mp) and 40.16 N (66.93 Mpa) for Rely XU100, respectively. Micro shear bond strength values for Panavia F2 cement were significantly higher than those for Rely XU100. Air abrasion has increased micro shear bond strength in both groups and the amount of increase was significant in Panavia F2 group (p<0.001). Air-abrasion before cementation increases bond strength to Cercon porcelain.
Sahabi Mahasti, Fayaz Ali and Yaghmaie Kaveh, 2010. Effect of Air-Abrasion on Micro shear Bond Strength of Two Resin Cements to Cercon Porcelain. Research Journal of Medical Sciences, 4: 142-145.