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Quintessence Publishing: Journals: IJP
The International Journal of Prosthodontics

Edited by George A. Zarb, BChD, DDS, MS, MS, FRCD(C)

ISSN 0893-2174

Publication:
March/April 2010
Volume 23 , Issue 2

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Evaluation of Color Duplication in Metal-Ceramic Complexes Using Visual and Instrumental Shade-Matching Systems

Eman M. Al-Hamdan, BDS, MS/Ihab Adel Hammad, BDS, MS, DS/Esam Tashkandi, BDS, MS, PhD

Pages: 149151
PMID: 20305853

This study was designed to evaluate color differences (DE) between intended and fabricated shades of various metal-ceramic complexes using visual and instrumental shade determination. Forty-two master disks were made to represent every tab in two shade guides. The shades of the master disks were determined visually and instrumentally. Accordingly, 84 experimental disks were fabricated. Color measurements of the master and fabricated disks were performed using a spectrophotometer. Visual shade determination showed a significantly lower DE value than the instrumental shade determination. However, all groups showed DE values exceeding 2.75, which could be considered perceivable and therefore clinically unacceptable. A reliable shade duplication of an existing metal-ceramic restoration cannot be ensured, regardless of the method of shade assessment. Int J Prosthodont 2010;23:149151.

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