Evaluation of shear bond strength between zirconia core and ceramic veneers fabricated by pressing and layering techniques: In vitro study

Although ceramic veneered on to zirconia core have been in use for quite some time, information regarding the comparative evaluation of the Shear bond strength of Pressable & Layered ceramic veneered on to zirconia core is limited. To evaluate the shear bond strength of zirconia core and ceramic...

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Bibliographic Details
Published in:Journal of pharmacy & bioallied science 2015-08, Vol.7 (Suppl 2), p.S612-S615
Main Authors: Subash, M, Vijitha, D, Deb, Saikat, Satish, A, Mahendirakumar, N
Format: Article
Language:English
Subjects:
Analysis
Bond strength
Ceramics
Chemical bonds
Chemical properties
Conflicts of interest
Cooling
Dental Science - Original
Hypotheses
Polyvinyl chloride
Production methods
Zirconium
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Summary:Although ceramic veneered on to zirconia core have been in use for quite some time, information regarding the comparative evaluation of the Shear bond strength of Pressable & Layered ceramic veneered on to zirconia core is limited. To evaluate the shear bond strength of zirconia core and ceramic veneer fabricated by two different techniques, Layering (Noritake CZR) and Pressing (Noritake, CZR Press). 20 samples of zirconia blocks were fabricated and the samples were divided into group A & B. Group A - Ceramic Veneered over zirconia core by pressing using Noritake CZR Press. Group B - Ceramic Veneered over zirconia core by layering using Noritake CZR. The veneered specimens were mounted on to the center of a PVC tube using self-cure acrylic resin leaving 3 mm of the veneered surface exposed as cantilever. Using a Universal testing machine the blocks were loaded up to failure. The results were tabulated by using independent samples t-test. The mean shear bond strength for Pressed specimens was 12.458 ± 1.63(S.D) MPa and for layered specimens was 8.458 ± 0.845(S.D) MPa. Pressed specimens performed significantly better than the layered specimen with a P value 0.001. Clinicians and dental laboratory technicians should consider the use of pressed ceramics as an alternative to traditional layering procedures to reduce the chances of chipping or de-lamination of ceramics.
ISSN:0976-4879
0975-7406
0975-7406
DOI:10.4103/0975-7406.163568