Effectiveness of Shade Measurements Using a Scanning and Computer Software System: a Pilot Study

Objectives: The aim of the present study was to evaluate a digital scanning and color measuring system in vivo in relation to the subjective, visual shade determination and an objective, wellknown digital spectrophotometric system. Methods: Shade determination with the 3D-Master system was performed at 29 patient including 87 teeth using a new scanning and computer-based system (3Shape TRIOS ® Color system), a well-known spectrophotometric computer-based system (MHT SpectroShade™) and the subjective visual shade assessment. The reliability of the two objectives and the subjective color assessment methods was calculated as an inter-individual comparison of the shade determination obtain by two dentists. Thereafter the validity of the objective methods was compared with the subjective methods by a pairwise comparison of color tabs selected by two dentists with each method. Each dentist determined which color tap was the best match. Results: The reliability of the objective, computer-based systems was high compared with the subjective, visual method for color determination. The validation test demonstrated no significant differences between the new Trios® Color System and the conventional, visual method and between the MHT SpectroShade™ spectrophotometric system and the conventional, visual method. Conclusion: The effectiveness of the new digital scanning and computer software system for color determination was as good as an earlier tested and validated digital colorimetric system and as the conventional, visual method for color determination of teeth.

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