Evaluation Of The Internal Surface Treatment Type Of Zirconia On The Shear Bond Strength Of Different Patternsofresin Cements (In Vitro Study)

Aim: to evaluate the shear bond strength of zirconia bonded with two dual cure adhesive resin cements PANAVIA F 2.0 and PERMAFLO DC using two surface treatment techniques: sand blasting and silica coating using Cojet system. Materials and Methods: 60 cubes samples with dimensions (10×10×10mm) and 60 cylinders samples with dimensions (3mm diameter, 2mm height ) were cut from three zirconia ceramic blocks. Sandblasting was done using air blasting machine with 110 μm AL2O3 particles and Silica coating surface treatment was done using Cojet system with 30 μm SiO2 particles. Half of the cylinders sandblasted zirconia samples were cemented to half the sand blasted cubic samples using PANAVIA F 2.0 adhesive resin cement and the rest were cemented using PERMAFLO DC adhesive resin cement. Also, half of the small silica coated zirconia samples were cemented to half the silica coated large samples using both cements. Thermocycling were done for 5000 thermal cycles. The shear bond strength was tested using a computerized universal testing machine. Results: Zirconia specimens cemented with PANAVIA F 2.0 showed higher shear bond strength than specimens cemented with PERMAFLO DC with silica-treated zirconia surfaces and sandblasted surface treatments. Conclusion: PANAVIA F 2.0 resin cement and silica coating surface treatment could be the best cement and surface treatment for zirconia and sand blasting could be a promising alternative surface treatment.