Comparison of digital and spectrophotometric measurements of colour shade guides

Journal of Oral Rehabilitation
E CalT Kose

Abstract

Colour determination may be precisely performed with spectrophotometers, however this technique is time consuming and requires special devices. The aim of this study was to determine the correlation between the colour measurements performed on three shade guides of the same manufacturer, obtained with digital and spectrophotometric analyses. Sixty shade tabs of three shade guides were analysed to determine the L*, a*, b* values with a spectrophotometer. The same shade tabs were also imaged with a digital camera, and same colour parameters were determined on the digital images with the software. Three measurements for each shade tab were made with both methods. Statistical differences between the results of two methods were determined using anova (alpha = 0.05). Additionally, presence of any correlation between two methods within each guide was investigated by using correlation analysis. It was observed that the a* and b* values obtained by digital method were correlated with those of the spectrophotometer. Spectrophotometric analysis revealed no disparities among the L* measurements of the shade tabs of three shade guides (P > 0.05), but significant differences were observed between the L* values of the shade tabs with digital ...Continue Reading

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Citations

Jan 6, 2010·Clinical Oral Investigations·Oi-Hong TungShyh-Yuan Lee
Mar 26, 2010·Clinical Oral Investigations·Pelin GüneriHayal Boyacioğlu
Aug 11, 2011·Clinical Oral Investigations·Siegbert WitkowskiJorge R Strub
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