Estudio in vitro de la resistencia a la tracción de postes de fibra de vidrio cementados con cuatro agentes cementantes

Abstract

Introduction: The most frequent cause of the glass-fiber post failure was push-out due to a failure in the adhesion dentin/agent cement interface. Purpose. The purpose of this in vitro study was to evaluate and compare the dislocation resistance of glassfiber post cemented by 4 different cement agents. Material and methods. Forty extracted canine were transversal sectioned at roof pulp level (n=10). Each group received fiber posts were randomly cemented using cement Panavia F 2.0, Unicem, Fuji plus, Variolink. Each sample was loaded in tension in an Instrom universal testing machine. The maximum force required to dislodge each post was recorded. Data were subjected to 1-way ANOVA and Tukey tests. (p<0.05). Results. The determination coefficient (R2) of the model was 80%. The one-way ANOVA disclosed significant differences between groups (p<0.0001), and a multiple comparisons test revealed that statistically significant difference among the 4 cementing agents (p<0.05). Conclusions. This in vitro study demonstrated that dual-cured resin cement Panavia F 2.0 resulted in the highest dislodgement force thus would be within the clinically acceptable standard.