Effect of Surface Conditioning Methods on Microtensile Bond Strength of Resin Cement to Glass Infiltered Ziriconia-Reinforced Ceramic.
Journal Title: International Journal of Dental Science and Innovative Research (IJDSIR) - Year 2019, Vol 2, Issue 3
Abstract
Aim and objectives: The objective of the study was to evaluate the effect of three surface conditioning methods on the microtensile bond strength of resin cement to a glass infiltrated zirconia reinforced alumina based core ceramic. Method: 30 blocks of Zirconia In-Ceram were fabricated according to the manufacturer’s instructions and duplicated in resin composite. One composite resin block was fabricated for each ceramic block and assigned to one of the three treatment conditions (n=10). Group I (Laboratory Gritblasting): Surface conditioning was done with 110 m aluminum oxide. Group II (Laboratory Silica Coating): Silica coating process was conducted using a laboratory type of air abrasion device in which the specimens were first conditioned by air-abrasion with 110µm grain sized Al2O3 particles and with 110µm grain sized SiO2. Group III (Hydrofluoric Acid-etching): The ceramic substrates were etched with 9.5% hydrofluoric acid gel according to the manufacturer’s strict regulations. Following all the three conditioning methods, the blocks were coated with silane coupling agent and the ceramic-composite blocks were then cemented with the resin cement. The samples were subjected to universal testing machine to evaluate the bond strength. Result: Comparison of the bond strength of the three groups (I, II, III) by one way ANOVA was done. It was seen that there was a statistically significant difference within the groups (P<0.05) with Group II that is laboratory silica coating showing the highest mean bond strength (28.23 + 1.53 MPa), followed by Group I that is laboratory grit blasting (20.2 + 2.33 MPa). Group III that is hydrofluoric acid-etching showed the least mean bond strength (10.41 +1.46 MPa). Conclusion: The effect of three surface conditioning methods on the microtensile bond strength of resin cement to a glass infiltrated zirconia reinforced alumina based core ceramic was variable. Roughening the ceramic surfaces with air particle abrasion with 110µm Al2O3 followed by silica coating with particle size of 110 µm SiO2 and silanization prior to cementation provided higher bond strength when compared with air particle abrasion with 110µm Al2O3 and silanization. Hydrofluric acid gel used for conditioning the reinforced ceramics showed the least mean shear bond strength.
Authors and Affiliations
Dr. Ashfaq Yaqoob
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