Fractographic Study of the Interface Between Zirconia Y-TZP and Its Veneering Ceramic After Shear Strength Testing

• Autores: María Victoria López Mollá, Amparo Martínez González, Vicente Amigó Borrás, José Félix Mañes Ferrer
• Localización: The International Journal of Prosthodontics, ISSN-e 1942-4426, Vol. 28, Nº. 4, 2015, págs. 432-434
• Idioma: inglés
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• Resumen

  • This study analyzed the shear strength and fracture characteristics of the interface between zirconia samples and their veneering ceramic compared with a metal-ceramic and a lithium disilicate glass-ceramic control group together with an assessment of the possible relationship between the fracture characteristics and the recorded shear strength. The greatest shear strengths corresponded to the lithium disilicate glass-ceramic control group followed by the metal-ceramic control group, with lesser strengths in the zirconia groups. Since the fractographic study showed cohesive-type failure to predominate in the zirconia samples, it is concluded that improvements are needed in the veneering ceramic and liner used in zirconia restorations.