Evaluation of the film thickness, compressive strength, and tensile bond strength for 10 types of temporary cement

Abstract

Purpose: Ceramic materials are frequently used in restorative and prosthetic treatment because of their superior esthetics, and it is important that temporary crowns are maintained in the abutment space until the final prosthetic is fitted. The objective of this study was to evaluate the properties of 10 commercial temporary cements.
Materials and Methods: Ten temporary cements were investigated: four types of resin-based cements and two types each of zinc oxide-based, carboxylate-based, and glass ionomer-based cements. The film thickness, tensile bond strength and compressive strength of these cements were measured, and the results were statistically analyzed using post-hoc Tukey multiple comparison tests.
Results and Discussion: Zinc oxide-based and glass ionomer-based cements recorded the thinnest film thickness. The carboxylate-based cements were significantly thicker than the other cements. The tensile bond strength of the resin-based cements was the highest after storage at room temperature, but the bond strength of almost all groups decreased significantly after water storage. However, the bond strength of the zinc oxide-based cements was not significantly decreased after water immersion, because of the oil component of the cement. The compressive strength of the resin-based cements was greater than that of the other cements.
Conclusion: Our findings suggested that the strength of temporary cements affected the bond strength.