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Effects of two surface finishes on the color of cemented and colored anatomic-contour zirconia crowns. | LitMetric

Effects of two surface finishes on the color of cemented and colored anatomic-contour zirconia crowns.

J Prosthet Dent

Associate Professor, School of Dental Technology, Taipei Medical University, Taipei, Taiwan. Electronic address:

Published: August 2016

AI Article Synopsis

  • The esthetic appearance of colored zirconia restorations is affected by the coloring liquid and the optical qualities of the luting cements, with limited research on the impact of surface-finishing methods.
  • This study aimed to examine how different surface finishing techniques (no treatment, polishing, glazing) affect the color distribution of zirconia crowns before and after cementing them on abutments.
  • Results showed significant color differences between surface treatment methods, indicating that the finishing technique and the application of luting cement greatly influence the final color appearance of zirconia crowns.

Article Abstract

Statement Of Problem: The esthetic appearance of anatomic-contour zirconia restorations is influenced by the shade of the coloring liquid and the optical properties of the luting cements. However, few studies are available on the effects of surface-finishing methods and luting cements on colored anatomic-contour zirconia restorations.

Purpose: The purpose of this in vitro study was to investigate the effects of surface finishing methods on the color distribution of colored anatomic-contour zirconia crowns before and after being cemented onto abutments.

Material And Methods: Implant-supported anatomic-contour zirconia premolar crowns were fabricated and immersed in A3-coloring liquid for 30 seconds. The colored zirconia crowns were separated into 3 groups according to the method of surface treatment: no treatment (N), polishing (P), and glazing (G). The zirconia crowns without coloring liquid application served as the control group. CIELab color coordinates were obtained, and color differences (ΔE) between shaded crowns were calculated with a spectrophotometer. The color stability of the crown before and after cement application was also investigated.

Results: Before cement application, the mean color difference between groups N and P was 2.85 ΔE units, whereas the mean ΔE value between groups N and G was 3.27. Mean ΔE values with and without cement application among groups ranged from 2.75 to 3.45 ΔE units.

Conclusions: The color appearance of the colored zirconia crowns was strongly influenced by the surface-finishing methods and luting cement application.

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Source
http://dx.doi.org/10.1016/j.prosdent.2015.12.012DOI Listing

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