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VOLUME 19 , ISSUE 7 ( 2018 ) > List of Articles


Comparison of Adhesion of a Novel Pre-sintered Cobalt-Chromium to Pre-sintered Zirconia and Cast Nickel–Chromium

Elie E Daou, Pascale Salameh, Nadin Al-Haj Husain

Keywords : Computer-aided design/computer-aided manufacturing, Pre-sintered cobalt-chromium, Shear bond

Citation Information : Daou EE, Salameh P, Husain NA. Comparison of Adhesion of a Novel Pre-sintered Cobalt-Chromium to Pre-sintered Zirconia and Cast Nickel–Chromium. J Contemp Dent Pract 2018; 19 (7):816-823.

DOI: 10.5005/jp-journals-10024-2341

License: CC BY-NC 3.0

Published Online: 01-01-2018

Copyright Statement:  Copyright © 2018; The Author(s).


Aim: This study compared the bond strength of pre-sintered Ceramill Sintron to pre-sintered zirconia and cast nickel–chromium (NiCr). Materials and methods: Specimens (n = 60) (diameter: 15 mm; thickness: 2 mm) were prepared (n = 20/group) (Ceramill Sintron, Ceramill Zi, and Wirobond 99). Disks were layered with vita VM ceramic (4 mm). Specimens were randomly divided into two subgroups. Only one subgroup was thermocycled. Specimens were tested under shear strength. Energy-dispersive X-ray (EDX) mapping was done on one disk of each material before and after ceramic layering. Results: Failure types were mostly mixed failures. Significant difference was found between the three materials for Y and Z failure types (p-values: 0.032 and 0.010 respectively). Thermocycling had no major effect on the results reported. Considering Fmax (force-inducing bonding failure) registered, significant difference was found between the control group and milled alloys groups. No significant difference was found between Ceramill Sintron and Zi. The EDX mapping showed a net increase in the control group oxide layer, whereas only slight increase and decrease were reported for Zi and Sintron respectively. Conclusion: When compared with cast NiCr, novel Ceramill Sintron has higher bond strength, comparable to Ceramill Zi. Thermocycling had no major effects on the results. Clinical significance: Ceramic–alloy bonding is a primary factor in the prosthesis’ longevity.

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