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VOLUME 16 , ISSUE 2 ( February, 2015 ) > List of Articles

RESEARCH ARTICLE

Comparison of Shade of Ceramic with Three Different Zirconia Substructures using Spectrophotometer

Syed Rashid Habib, Ibraheem F Al Shiddi

Citation Information : Habib SR, Shiddi IF. Comparison of Shade of Ceramic with Three Different Zirconia Substructures using Spectrophotometer. J Contemp Dent Pract 2015; 16 (2):135-140.

DOI: 10.5005/jp-journals-10024-1650

Published Online: 01-02-2015

Copyright Statement:  Copyright © 2015; Jaypee Brothers Medical Publishers (P) Ltd.


Abstract

Objective

This study assessed how changing the Zirconia (Zr) substructure affected the color samples after they have been overlaid by the same shade of veneering ceramic.

Materials and methods

Three commercial Zr materials were tested in this study: Prettau® Zirconia (ZirKonZahn, Italy), Cercon (Dentsply, Germany) and InCoris ZI (Sirona, Germany). For each system, 15 disk-shaped specimens (10 × 1 mm) were fabricated. Three shades of A1, A2 and A3.5 of porcelain (IPS e.MaxCeram, IvoclarVivadent, USA) were used for layering the specimens. Five specimens from each type of Zr were layered with same shade of ceramic. Color measurements were recorderd by a spectrophotometer Color-Eye® 7000A (X-Rite, Grand Rapids, MI). Mean values of L, a, b color coordinates and ?E were recorded and comparisons were made.

Results

Differences in the ΔE were recorded for the same porcelain shade with different Zr substructures and affected the color of the specimens (p < 0.01, ANOVA). The maximum difference between the ΔE values for the A1, A2 and A3.5 shades with three types of Zr substructures was found to be 1.59, 1.69 and 1.45 respectively. Multiple comparisons of the ΔE with PostHoc Tukey test revealed a statistically significant difference (p < 0.05) between the three types of Zr, except between Type 2 Zr and Type 3 Zr for the Shade A1. The mean values of L, a, b and ΔE for the Prettau® Zirconia substructure were found to be the least among the three types.

Conclusions

The brand of Zr used influences the final color of the all ceramic Zr based restorations and this has clinical significance.

How to cite this article

Habib SR, Al Shiddi IF. Comparison of Shade of Ceramic with Three Different Zirconia Substructures using Spectrophotometer. J Contemp Dent Pract 2015;16(2): 135-140.


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