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COMPARISON OF SHADE CHANGES ACCORDING TO DRY/WET CONDITION OF TEETH USING INTRA-ORAL COLORIMETER

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Authors
Lee, Dong-Hwan; Han, Jung-Suk; Yang, Jae-Ho; Lee, Jai-Bong
Issue Date
2005
Publisher
대한치과보철학회
Citation
대한치과보철학회지 2005;43(3)
Keywords
Shade takingDry shadeColorimeterShadeScan System(TM)VITA easyshade(R)
Abstract
Objectives. The purpose of this study was to compare the shade changes in wet and dry conditions of natural teeth using two different intra-oral colorimeters. Materials and methods. Twenty volunteer subjects have no restorations and fillings in the maxillary central incisors were involved in this clinical study. The color of tooth was measured by two different instruments that were a Shade System and a VITA , Five times consecutive measurements were done for each subject with both instruments. Groups of measurement are an initial wet condition as control, dry in 5 minutes, 15 seconds after re-wetting with saliva, re-wetting after 5minutes and re-wetting after 30 minutes. Using ShadeScan , tooth image was captured and converted to the mapping image of Vitapan 3D master. Three main shades were chosen from each subject and calculated the area in Global Lab Image software. Data were analyzed using paired T-Test and Wilcoxon Signed Ranked Test. Using VITA , color differences(E) between measurements were analyzed with one sample T-test. Results. Using ShadeScan , there were significant differences between control group and dry(P=.023), dry and re-wetting 15 seconds, 5 minutes, 30 minutes as well(P=.021, P=.017, P=.030) in comparison of primary shade. However, comparing three main shades, there was no significant difference between control and dry(P=.105). Using VITA , color differences(E) between control and dry, dry and re-wetting 30 minutes were statistically different(P=.002, P=.022). Conclusion. Primary shade could be changed in dry and wetting procedure in time, however there was no significant shade changes in overall.
ISSN
0301-2875
Language
English
URI
http://hdl.handle.net/10371/47769
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College of Dentistry/School of Dentistry (치과대학/치의학대학원)Dept. of Dentistry (치의학과)Journal Papers (저널논문_치의학과)
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