Int J Prosthodont 28 (2015), No. 4 28. July 2015
Int J Prosthodont 28 (2015), No. 4 (28.07.2015)
Page 432-434, doi:10.11607/ijp.3873, PubMed:26218031
Fractographic Study of the Interface Between Zirconia Y-TZP and Its Veneering Ceramic After Shear Strength Testing
López-Mollá, Maria Victoria / Martínez-González, Amparo / Amigó-Borrás, Vicente / Mañes-Ferrer, José Félix
This study analyzed the shear strength and fracture characteristics of the interface between zirconia samples and their veneering ceramic compared with a metalceramic 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.