Effect of veneering method on the fracture and bond strength of bilayered zirconia restorations.
This study evaluated the fracture strength and microtensile bond strength of a new computer-aided design (CAD) veneering method for zirconia frameworks. A new CAD/computer-assisted manufacture system was used to fabricate a resin replica of the esthetic ceramic required to veneer a zirconia framework. The replicas were processed using press-on technology. Identical manually layered zirconia specimens served as a control (n = 18; alpha = .05). Statistical analysis revealed that the fracture strength (442.8 +/- 25 N) and microtensile bond strength (26.6 +/- 2 MPa) of CAD-veneered zirconia were significantly higher (P < .001) compared to the control (346 +/- 24 N and 15.1 +/- 1 MPa, respectively). CAD veneering is a reliable method for veneering zirconia frameworks.
Department of Dental Materials Science, Academisch Centrum Tandheelkunde Amsterdam, Universiteit van Amsterdam and Vrije Universiteit, The Netherlands. dentalmaterials@acta.nl
Moustafa N
MN
Aboushelib
Marcel
M
de Kler
Jef M
JM
van der Zel
Albert J
AJ
Feilzer
D017076:Computer-Aided Design; D001840:Dental Bonding; D003764:Dental Materials / Q000737:chemistry*; D003776:Dental Porcelain / Q000737:chemistry; D017267:Dental Prosthesis Design; D003801:Dental Veneers; D006801:Humans; D008422:Materials Testing; D008855:Microscopy, Electron, Scanning; D019279:Resin Cements / Q000737:chemistry; D013314:Stress, Mechanical; D013499:Surface Properties; D013718:Tensile Strength; D015040:Zirconium / Q000737:chemistry*
C438313:Clearfil SE Bond; D003764:Dental Materials; C508050:IPS e.max Press; D019279:Resin Cements; D003776:Dental Porcelain; D015040:Zirconium; C028541:zirconium oxide