for the fabrication of machinable ceramic blocks for dental restoration. Different compositions of pure and mixed oxide ceramics Al2O3/Y-PSZ from 0% to 100% Y-PSZ have been produced and tested. Microstructure and mechanical performances as strength, fracture toughness are investigated to identify the potential prosthetic class of application. Tetragonal partially stabilized Zirconia Y-PSZ exhibited best performance: strength 1070 [MPa], fracture toughness (measured with SEVNB method) 8,5 [MPa √m]. Prototypes of three-unit dental bridges made of tetragonal stabilized Zirconia are fabricated with CAD/CAM system. An in vitro bridge test is developed to simulate masticatory loads and to evaluate the load bearing capacity of a three unit bridge made of elaborated Y-PSZ. Keywords: alumina, zirconia, mechanical properties, slip casting, CAD/CAM.
Alumina/Zirconia System for dental applications
LICCIULLI, ANTONIO ALESSANDRO;DISO, Daniela;MAFFEZZOLI, Alfonso
2008-01-01
Abstract
for the fabrication of machinable ceramic blocks for dental restoration. Different compositions of pure and mixed oxide ceramics Al2O3/Y-PSZ from 0% to 100% Y-PSZ have been produced and tested. Microstructure and mechanical performances as strength, fracture toughness are investigated to identify the potential prosthetic class of application. Tetragonal partially stabilized Zirconia Y-PSZ exhibited best performance: strength 1070 [MPa], fracture toughness (measured with SEVNB method) 8,5 [MPa √m]. Prototypes of three-unit dental bridges made of tetragonal stabilized Zirconia are fabricated with CAD/CAM system. An in vitro bridge test is developed to simulate masticatory loads and to evaluate the load bearing capacity of a three unit bridge made of elaborated Y-PSZ. Keywords: alumina, zirconia, mechanical properties, slip casting, CAD/CAM.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
