Publication: Análisis de la resistencia a la flexión y translucidez de materiales cerámicos sometidos a envejecimiento artificial
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2018-11-05
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Universidad Complutense de Madrid
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Abstract
Actualmente hablar de restauraciones estéticas indirectas de recubrimiento total, implica hablar de cerámicas sin metal. Desde hace más de una década, la aparición de nuevos formulaciones de cerámicas y el establecimiento definitivo de la aplicación de la tecnología CAD-CAM han revolucionado los tratamientos dentales.Los materiales cerámicos de alta resistencia, tienen el inconveniente de ser materiales con una gran opacidad, por lo que se han desarrollado diversos mecanismos para aumentar la translucidez y por tanto mejorar las propiedades ópticas de estos materiales como el dopaje con polietilenamina y alúmina, la disminución del tamaño de grano, la disminución de los poros, desarrollando una estructura tetragonal de microcristales de zirconia homogénea para reducir la dispersión de luz,aumentando la temperatura de sinterización a 1550ºC, utilizando polvo de partículas 40 nm y aumentando la fase cúbica en la zirconia. El desarrollo de este tipo de cerámicas translúcidas permite realizar restauraciones monolíticas de contorno completo sin necesidad de estratificar las estructuras, reduciendo por lo tanto muchos de los problemas de las restauraciones totalmente cerámicas, así disminuir la posibilidad de la fractura de la restauración, eliminar fases en el proceso de fabricación y por lo tanto minimizar errores, abaratar costes y hacer preparaciones dentarias más conservadoras...
For more than a decade, the development of new materials and the CAD-CAM technology have revolutionized dental treatment. Ceramic materials with high strength, have the disadvantage of high opacity, so we have developed several mechanisms to increase translucency and thus improve the optical properties of these materials as: doping with polyethyleneimine and alumina, decreasing grain size, decreasing the pores, developing a tetragonal structure microcrystals oxide homogeneous zirconium to reduce light scattering, increasing the sintering temperature of1550 ° C, using powder particles 40 nm and increasing the cubic phase in thezirconia.The development of these type of ceramics allows develop monolithic restorations full contour reducing many of the problems of ceramic restorations, thereby reducing the possibility of fracture restoration, eliminate stages in the manufacturing process and thus minimize errors, reduce costs and make more conservative tooth preparations. Purpose: the main objective is to evaluate the flexural strength in 3 points and the translucency of different ceramic materials as well as to analyze the relationship between both variables, before and after being subjected to artificial aging...
For more than a decade, the development of new materials and the CAD-CAM technology have revolutionized dental treatment. Ceramic materials with high strength, have the disadvantage of high opacity, so we have developed several mechanisms to increase translucency and thus improve the optical properties of these materials as: doping with polyethyleneimine and alumina, decreasing grain size, decreasing the pores, developing a tetragonal structure microcrystals oxide homogeneous zirconium to reduce light scattering, increasing the sintering temperature of1550 ° C, using powder particles 40 nm and increasing the cubic phase in thezirconia.The development of these type of ceramics allows develop monolithic restorations full contour reducing many of the problems of ceramic restorations, thereby reducing the possibility of fracture restoration, eliminate stages in the manufacturing process and thus minimize errors, reduce costs and make more conservative tooth preparations. Purpose: the main objective is to evaluate the flexural strength in 3 points and the translucency of different ceramic materials as well as to analyze the relationship between both variables, before and after being subjected to artificial aging...
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Tesis inédita de la Universidad Complutense de Madrid de la Facultad de Odontología del Departamento de Estomatología I, leída el 22 de Enero de 2018