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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
engineering
Microtensile bond strength of different components of core veneered all-ceramic restorations. Part II: Zirconia veneering ceramics
Dental Materials, Volume 22, No. 9, Year 2006
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Description
Objectives: The purpose of this research was to investigate microtensile bond strength between one type of zirconia substrate and various commercial veneer ceramics. The effect of an optional liner material between the core and veneer was also evaluated where applicable. Methods: Bilayered zirconia veneer discs were fabricated from five layering and two pressable veneer ceramics. Additionally, discs from each veneer ceramic were prepared. The discs were cut into microbars of 6 mm in length and 1 mm in cross-section. The microtensile bond strength was tested in a universal testing machine. The fracture surfaces of the microbars were examined with scanning electron microscopy (SEM) and EDAX. Results: The microtensile strength of Rondo Dentine and Lava Dentine veneer ceramics were significantly higher than the other tested veneer ceramics. Furthermore, the layered systems Rondo Dentine and Ceram Express were significantly stronger than the other tested core-veneer ceramics. The application of liner material dramatically affected the bond strength and failure mode, which was also material dependent. SEM analysis showed that two pressable veneers and one type of layering veneer ceramic failed entirely cohesively in veneer side while the remaining test groups had higher percentage of interfacial failure. Significance: Selection of stronger veneer ceramics which have good bond strength with zirconia can reduce the chances of chipping and delamination under function. The liner material should only be used with some layering veneers but not in combination with pressable veneers as it will result in weakening of the microtensile bond strength. © 2005 Academy of Dental Materials.
Authors & Co-Authors
Aboushelib, Moustafa Nabil M.
Netherlands, Amsterdam
Universiteit Van Amsterdam
Kleverlaan, Cornelis J.
Netherlands, Amsterdam
Universiteit Van Amsterdam
Feilzer, Albert Joseph
Netherlands, Amsterdam
Universiteit Van Amsterdam
Statistics
Citations: 253
Authors: 3
Affiliations: 1
Identifiers
Doi:
10.1016/j.dental.2005.11.014
ISSN:
01095641
Research Areas
Health System And Policy