Format

Send to

Choose Destination
See comment in PubMed Commons below
J Adv Prosthodont. 2013 Aug;5(3):296-304. doi: 10.4047/jap.2013.5.3.296. Epub 2013 Aug 31.

Effect of polishing and glazing on the color and spectral distribution of monolithic zirconia.

Author information

1
Department of Prosthodontics and Dental Research Institute, School of Dentistry, Seoul National University, Seoul, Republic of Korea.

Abstract

PURPOSE:

The aim of this study was to evaluate the effect of polishing and glazing on the color and spectral distribution of monolithic zirconia.

MATERIALS AND METHODS:

Forty-five monolithic zirconia specimens (16.3 mm × 16.4 mm × 2.0 mm) were fabricated and divided into 5 groups according to the number of A2-coloring liquid applications (Group I to V). Each group was divided into 3 subgroups according to the method of surface treatments (n=3): N: no treatment; P: polishing; G: glazing. Color and spectral distribution of five different areas of each specimen were measured according to CIELAB color space in the reflectance mode relative to the standard illuminant D65 on a reflection spectrophotometer. Data were analyzed using one-way ANOVA followed by Tukey's HSD test, Pearson correlation and regression analysis (α=.05).

RESULTS:

There was a significant difference in CIE L (*) between Subgroup N and P, and in CIE b (*) between Subgroup P and G in each group. Spectral reflectance generally decreased in Subgroup P and G in comparison with Subgroup N. Color differences between Subgroup P and G were within the perceptibility threshold (ΔE (*) ab< 3.7) in most groups. Highly significant correlation was found between CIE b (*)and each subgroups as the number of coloring liquid applications increased (R (2)>0.88, P<.001).

CONCLUSION:

A perceptible color difference can be detected after polishing of monolithic zirconia. Polishing decreases the lightness, and glazing also decreases the lightness, but increases the yellowness of monolithic zirconia.

KEYWORDS:

Color; Dental polishing; Surface properties; Zirconia-based ceramic

PubMed Commons home

PubMed Commons

0 comments
How to join PubMed Commons

    Supplemental Content

    Full text links

    Icon for The Korean Academy of Prosthodontics Icon for PubMed Central
    Loading ...
    Support Center