| Lightness, chroma, and hue distributions of a shade guide as measured by a spectroradiometer. | |
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MedLine Citation:
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PMID: 20813231 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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STATEMENT OF PROBLEM: The color attributes of commercially available shade guides have been measured by spectrophotometers (SP), which are designed to measure flat surfaces. However, there is limited information on the color distribution of shade guides as measured by spectroradiometers (SR), which are capable of measuring the color of curved surfaces. PURPOSE: The purpose of this study was to determine the distributions of lightness (CIE L*) and chroma (C*(ab)) step intervals between adjacent shade tabs of a shade guide based on the lightness, chroma, and hue attributes measured by an SR. MATERIAL AND METHODS: Lightness, chroma, hue angle, and CIE a* and b* values of the shade tabs (n=26) from a shade guide (Vitapan 3D-Master) were measured by an SR under daylight conditions. The distributions of the ratios in lightness and chroma of each tab compared with the lowest lightness tab or the lowest chroma tab were determined. The values for each color parameter were analyzed by a 3-way ANOVA with the factors of lightness, chroma, and hue designations of the shade tabs (alpha=.05). RESULTS: The chroma and CIE a* and b* values were influenced by the lightness, chroma, and hue designations of the shade tabs (P<.001); however, the lightness and hue angle were influenced by the lightness and hue designations, but not by the chroma designation. Distributions for the CIE a* and b* values, in each lightness group, corresponded with the chroma designation. However, the intervals in the lightness and chroma scales between adjacent tabs were not uniform. CONCLUSIONS: The intervals in the color parameters between adjacent shade tabs were not uniform based on SR measurements. Therefore, a shade guide in which shade tabs are more equally spaced by the color attributes, based on the values as measured by an SR along with observers' responses with respect to the equality of the intervals, should be devised. |
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Authors:
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Yong-Keun Lee; Bin Yu; Ho-Nam Lim |
Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: The Journal of prosthetic dentistry Volume: 104 ISSN: 1097-6841 ISO Abbreviation: J Prosthet Dent Publication Date: 2010 Sep |
Date Detail:
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Created Date: 2010-09-03 Completed Date: 2010-12-13 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 0376364 Medline TA: J Prosthet Dent Country: United States |
Other Details:
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Languages: eng Pagination: 173-81 Citation Subset: D; IM |
Copyright Information:
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Copyright © 2010 The Editorial Council of the Journal of Prosthetic Dentistry. Published by Mosby, Inc. All rights reserved. |
Affiliation:
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Denforus Co, Seoul, Korea. ykleedm@gmail.com |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Analysis of Variance Color / standards* Colorimetry / methods* Dental Prosthesis Design* Light Prosthesis Coloring* Radiometry / methods Reference Standards |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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