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KMID : 1004520130290010081
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Journal of Dental Rehabilitation and Applied Science
2013 Volume.29 No. 1 p.81 ~ p.93
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Shade Comparative Analysis of Natural tooth Measured by Visual and Two Colorimeters(ShadeEyeⓡ, Shadepilotⓡ)
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Ahn Jin-Hee
Choi Mee-Ra
Shim Hye-Won
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Abstract
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The objectives were to evaluate the accuracy of shade selection by human visual system(VS) and 2 different colorimeters
(ShadeEyeⓡ(SE) and Shadepilot (SP)). Maxillary anterior teeth of 30 volunteers which had no caries or restorations were included in the study. Firstly, the accordance in shade selection by 3 dentists and 2 colorimeters was investigated. Secondly,the color of the teeth were measured by 1 observer’s naked eye and 2 colorimeters under different illumination conditions (Sunny versus cloudy day). Additionally testing of inter-observer variability selected colors by 2 novice and 2 experienced dentists were compared. For comparing visual and 2 different colorimeters, SP(60%) showed significantly highest rate of accordance than the visual (23.3%) or SE (16.7%) and lowest mean ΔE (2.62±0.74 versus 3.83±1.38;SE or
4.04±1.61;VS)(p<0.001). If accuracy of shade selection were measured using VS, the mean ΔE value of cloudy day was
higher than that of sunny day (4.35±1.70 versus 3.53±1.31; p<0.001). There were no significant difference of the mean
ΔE value between sunny and cloudy day in both SE and SP. Inter- observer repeatability was higher in 2 experienced group (73.3%) than novice group (36.7%). The mean ΔE of experienced group was lower than that of novice group (3.60 ± 1.47 versus 4.70 ± 1.67; p<0.001). Colorimeters (SE or SP) is more accurate and more reproducible compared with human shade assessment. Using visual system may be limited by cloudy and inexperience of tester, then more experience and using colorimeters may be helpful of raising the accurate repeatability of shade selection
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KEYWORD
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Shade selection, Colorimeter, ShadeEye-Nccⓡ, ShadepilotTM
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