Color stability of CAD/CAM Zirconia ceramics following exposure to acidic and staining drinks

• Marco Colombo ^[1] ; Marco Cavallo ^[1] ; Matteo Miegge ^[1] ; Alberto Dagna ^[1] ; Riccardo Beltrami ^[1] ; Marco Chiesa ^[1] ; Claudio Poggio ^[1]
  1. [1] University of Pavia

     University of Pavia

     Pavía, Italia

     
• Localización: Journal of Clinical and Experimental Dentistry, ISSN-e 1989-5488, Vol. 9, Nº. 11 (November ), 2017, págs. 1297-1303
• Idioma: inglés
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• Resumen

  • The aim of this in vitro study was to evaluate the color stability of CAD/CAM Zirconia ceramics following exposure to acidic drink (Coca Cola) and after exposure to staining solution (coffee).

    All the samples were immersed in different staining solutions over a 28-day test period. A colorimetric evaluation according to the CIE L*a*b* system was performed by a blind trained operator at 7, 14, 21, 28 days of the staining process. Shapiro Wilk test and Kruskal-Wallis ANOVA were applied to assess significant differences among restorative materials. Paired t-test was applied to test which CIE L*a*b* parameters significantly changed after immersion in staining solutions.

    One week immersion in acidic drink did not cause a perceivable discoloration for all restorative materials (ΔE < 3.3). Subsequent immersion in coffee affected color stability of all Zirconia samples, even if Kruskal-Wallis ANOVA found significant differences among the various restorative materials.

    The ∆Es of CAD/CAM Zirconia ceramics after immersion in coffee varied among the products, but color integrity is not affected by contact with acidic drinks.