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International Journal of Applied Dental Sciences
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ISSN Print: 2394-7489, ISSN Online: 2394-7497
ICV 2019: 92.11

International Journal of Applied Dental Sciences

2018, Vol. 4 Issue 3, Part D

Evaluation of the effect of different conditioning methods on core-veneer bond strength of zirconia restorations an in-vitro study

AUTHOR(S): Dr. Jayasree Komala, Dr. Mohd. Umair, Dr. Sailasri K, Dr. Subhasri K
ABSTRACT:The aim of this study was to evaluate and compare shear bond strength of zirconia core to veneering porcelain after different methods of surface conditioning of the core. Materials and methods: 40 zirconia blocks were milled in the CAD/CAM system and divided into four groups (n=10). After sintering, Group A, control, no surface conditioning, group B specimens were subjected to air-borne particle abrasion with 110 µ aluminium oxide, Group C specimens were sandblasted with silica coated alumina particles. For Group D a mixture zirconia powder and adhesive were applied on the surface of the specimens before sintering. All these specimens were veneered with dimensions 3mm length, 5mm width and 3mm in height. Specimens were subjected to shear force and the shear bond strength was calculated. Fractured specimens were observed under scanning electron microscope. Results: The mean shear bond strength values in MPa were 40.06, 41.91, and 42.89, 47.24 for group A, B C and D respectively and statistically significant (p<0.05). Group D demonstrated higher shear bond strength than other groups. Scanning electron microscope evaluation showed cohesive fracture in the veneering porcelain in modified zirconia, while the other groups principally fractured at the core-veneer interface.
Conclusion: Surface conditioning of zirconia core with zirconia powder slurry significantly improved the shear bond strength.
Pages: 232-237  |  580 Views  14 Downloads
How to cite this article:
Dr. Jayasree Komala, Dr. Mohd. Umair, Dr. Sailasri K, Dr. Subhasri K. Evaluation of the effect of different conditioning methods on core-veneer bond strength of zirconia restorations an in-vitro study. Int J Appl Dent Sci 2018;4(3):232-237. DOI: https://doi.org/10.22271/oral.2018.v4.i3d.07
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International Journal of Applied Dental Sciences