Bond strength of a composite luting agent to alumina ceramic surfaces

Author： Derand Tore Molin Margareta Kvam Ketil

ISSN： 0001-6357

Source： Acta Odontologica Scandinavica, Vol.64, Iss.4, 2006-08, pp. : 227-230

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Abstract

Objective. The purpose of this study was to evaluate the shear bond strength (SBS) of a dental luting agent to alumina ceramics after different surface pretreatment. Material and Methods. Specimens ( n =50) of pressed blocks (10×0×5 mm) of alumina ceramic (Procera AllCeram) were divided into untreated specimens (AF) as provided by the manufacturer and polished specimens (AP). Five groups of specimens ( n =5×10) with different surface pretreatments were prepared. Groups 1 and 2: AF and AP without any pretreatment; Group 3: AF treated with silane, (AF-s); Group 4: AF treated with RF plasma spray (AF-RF); Group 5: AF treated with low fusing porcelain (AF-p) glass pearls. Composite cylinders (5×5 mm) were cemented to the test specimens with a resin luting agent. The specimens were loaded to failure in shear mode using a universal testing machine. Recorded loads were used to calculate SBS in MPa. The results were analyzed using one-way ANOVA and the Tukey HSD multiple comparison test at  = 0.05. Scanning electron microscopic micrographs (SEM) were used to characterize surfaces of interest. Results. Polished surfaces had significantly lower SBS ( p