in present study we evaluated the effect of air-abrasion of pre-sintered ceramic blocks on bond strength of a resin cement to zirconia.
Methods: a total of thirty Y-TZP blocks (2 ×5×10 mm) were prepared and divided into 3 groups. In the first group specimens were air-borne particle abraded with 50 µm alumina particles before sintering while specimens of second group were sintered and then air-abraded in the same manner. The third group have received no surface treatment. Then the micro sylanders of resin cement (Panavia F2.0, kuraray) were bonded to samples using tygon tubes (0.7mm) and were cured for 40 seconds. After 24 hours storage in 100% moisture inside an incubator, samples were subjected to micro-shear bond strength test with micro tensile tester (Bisco) at a constant speed of 1mm/min.
Results:
The means and standard deviations of the micro tensile bond strength of group 1, 2 and 3 were 14 ±4.7 , 12.5± 3.6 and 11.3 ±3.1 respectively.
Conclusions:
the adhesion of resin luting cement to zirconia ceramic might be related to using air-abrasion before sintering.