Comparación in vitro de la resistencia a la fractura ante fuerzas compresivas, entre una restauración en silicato de litio reforzado con zirconio cementado sobre esmalte y esmalte-dentina en dientes premolares

Abstract

Introduction: This investigation seeks to identify the resistance to fracture against compressive forces of the lithium silicate material reinforced with cemented zirconium on only enamel and a restoration in lithium silicate reinforced with cemented zirconium on enamel-dentine. Objective: To evaluate the resistance to fracture against compressive forces, between a restorations of lithium silicate reinforced with cemented zirconium on enamel and enamel-dentine in premolar teeth. Methodology: Fracture is defined for the study, as the moment when the team interrupts the constant application of forces, is the moment when the body loses resistance. Experimental in vitro, refers to a technique to perform a certain experiment in a controlled environment outside a living organism. For this case an experiment was performed on an organ of a human being. 38 natural healthy upper permanent premolar teeth, 19 teeth are taken for the cemented group only in enamel and 19 for the cemented group in dentin and enamel; and a sample of 6 teeth for pilot testing. Conclusion: The occlusal veneers cemented on dentin showed a lower record at the time of the fracture, but did not show statistically significant differences than the cemented on enamel. According to the standard deviation, the decision cannot be made to cement the occlusal veneers exclusively on a tissue evaluated according to the time and displacement variables. Keywords: In vitro comparison, Premolar teeth, Dentin enamel, Compressive forces, Resistance, Lithium silicate, Cemented zirconium