Joining dental ceramic layers with glass

Abstract Objective Test the hypothesis that glass-bonding of free-form veneer and core ceramic layers can produce robust interfaces, chemically durable and esthetic in appearance and, above all, resistant to delamination. Methods Layers of independently produced porcelains (NobelRondo™ Press porcela...

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Bibliographic Details
Published in:Dental materials 2011-10, Vol.27 (10), p.1011-1016
Main Authors: Saied, M.A, Lloyd, I.K, Haller, W.K, Lawn, B.R
Format: Article
Language:English
Subjects:
Advanced Basic Science
Aluminum Oxide
Ceramic core
Ceramics
Crown
Crowns
Dental Bonding
Dental materials
Dental Porcelain
Dental Stress Analysis
Dental Veneers
Dentistry
Elastic Modulus
Glass
Glass - chemistry
Glass bonding
Hardness
Interface
Materials Testing
Porcelain
Tetragonal zirconia polycrystals
Veneer
Vitrification
Yttria stabilized zirconia
Yttrium
Zirconium
Zirconium dioxide
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Summary:Abstract Objective Test the hypothesis that glass-bonding of free-form veneer and core ceramic layers can produce robust interfaces, chemically durable and esthetic in appearance and, above all, resistant to delamination. Methods Layers of independently produced porcelains (NobelRondo™ Press porcelain, Nobel BioCare AB and Sagkura Interaction porcelain, Elephant Dental) and matching alumina or zirconia core ceramics (Procera alumina, Nobel BioCare AB, BioZyram yttria stabilized tetragonal zirconia polycrystal, Cyrtina Dental) were joined with designed glasses, tailored to match thermal expansion coefficients of the components and free of toxic elements. Scanning electron microprobe analysis was used to characterize the chemistry of the joined interfaces, specifically to confirm interdiffusion of ions. Vickers indentations were used to drive controlled corner cracks into the glass interlayers to evaluate the toughness of the interfaces. Results The glass-bonded interfaces were found to have robust integrity relative to interfaces fused without glass, or those fused with a resin-based adhesive. Significance The structural integrity of the interfaces between porcelain veneers and alumina or zirconia cores is a critical factor in the longevity of all-ceramic dental crowns and fixed dental prostheses.
ISSN:0109-5641
1879-0097
DOI:10.1016/j.dental.2011.06.008