| Metameric effect between natural teeth and the shade tabs of a shade guide. | |
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MedLine Citation:
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PMID: 20572867 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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The objective of this study was to evaluate metameric effects, that is, the dependence of the colours of teeth and shade tabs on the illuminant used. The colours of 49 teeth of 37 participants and of the corresponding shade tabs of the 3D-Master (VITA Zahnfabrik; colour match DeltaE(ab)< 2) were measured using an intra-oral spectrophotometer (VITA Easyshade). Spectral reflectance data (from 400 to 700 nm) were recorded. Commission Internationale de l'Eclairage (CIE) L*a*b* values were calculated for D65 (reference daylight), A (incandescent light), and TL84 (store/office light) as reference illuminants. A modified metamerism index (Mod-M) and hue-angle ratios were calculated to express differences between tooth and tab colour relative to the difference observed under D65 illumination. The Mod-M for teeth and tabs was greater than unity (indicating a greater colour difference relative to D65) by 57.1% for A and by 49.3% for TL84. Hue-angle ratios of teeth and tabs using the test illuminants were different from those obtained using the standard illuminant D65. If teeth and shade tab matching is conducted using daylight illumination, the colour difference may not be the same under other lighting conditions, leading to perceptible, or even unacceptable, colour differences under these conditions. |
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Authors:
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Nicoleta Corcodel; Stephan Helling; Peter Rammelsberg; Alexander J Hassel |
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Publication Detail:
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Type: Comparative Study; Journal Article |
Journal Detail:
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Title: European journal of oral sciences Volume: 118 ISSN: 1600-0722 ISO Abbreviation: Eur. J. Oral Sci. Publication Date: 2010 Jun |
Date Detail:
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Created Date: 2010-06-24 Completed Date: 2010-09-28 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 9504563 Medline TA: Eur J Oral Sci Country: Denmark |
Other Details:
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Languages: eng Pagination: 311-6 Citation Subset: D; IM |
Affiliation:
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Department of Prosthodontics, University of Heidelberg, Heidelberg, Germany. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Bicuspid
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anatomy & histology Color Color Perception / physiology Cuspid / anatomy & histology Dentin / anatomy & histology Female Humans Incisor / anatomy & histology Light* Lighting / instrumentation Male Materials Testing Prosthesis Coloring / instrumentation* Reproducibility of Results Spectrophotometry Sunlight Tooth / anatomy & histology* |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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