Publication 7: Shade selection: spectrophotometer vs digital camera – a comparative in-vitro study

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Publication 7: Shade selection: spectrophotometer vs digital camera – a comparative in-vitro  study

 Abstract
Shade determination  may be precisely  performed with  spectrophotometers, however this  technique is time  consuming and requires special devices. The aim of this study was to ascertain if digitally acquired images with an SLR camera can be used as an alternative to the VITA easyshade spectrophotometer for obtaining the shade of the teeth. Twenty extracted anterior tooth samples
were analysed to determine the L*, a*, b* values with a spectrophotometer. The same samples were imaged with a digital camera, and same colour parameters were determined on  the digital images with a  software. Statistical analysis  was performed using pearson coefficient of correlation. It was observed that the L* and b* values obtained by both the methods were highly significant (r≥0.7,
p≤0.05) with r = 0.798 (p=0), r = 0.858 (p=0) whereas ‘a’ value was not significant with r=0.246 (p=0.377).   It can be concluded that an SLR camera with Adobe photoshop CS5.1 as an adjunct can be used as an  alternative to spectrophotometer in obtaining ‘l’ and ‘b’ values accurately.

Keywords: Digital analysis, Spectrophotometric analysis, Colour analysis, Cielab

https://www.researchgate.net/publication/309308311_Shade_Selection_Spectrophotometer_vs_Digital_camera_-_A_comparative_in-vitro_study

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