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Dental color standards: shade tab arrangement
R D Paravina1, J M Powers, R M Fay
1Department of Restorative Dentistry and Biomaterials, University of Texas Health Science Center at Houston, 77030-3402, USA. radeparavina@usa.net
Summary
Analyzing dental shade guides revealed arrangement inconsistencies. Arranging tabs by total color difference offers a universally applicable improvement for dental color standards, enhancing clinical accuracy.
Area of Science:
- Dental materials science
- Colorimetry
- Visual perception
Background:
- Accurate shade selection is crucial for esthetic dental restorations.
- Existing dental shade guides, such as Vitapan Classical and Vitapan 3-D Master, have established arrangements.
- Objective analysis of these arrangements is needed to identify potential improvements.
Purpose of the Study:
- To analyze the shade tab arrangement of Vitapan Classical and Vitapan 3-D Master dental shade guides.
- To identify shortcomings in the manufacturers' arrangement.
- To propose improved arrangement methods and clinical guidelines for dental color standards.
Main Methods:
- Shade tab data were recorded using a colorimeter (CIE L*a*b* system).
- Manufacturers' arrangements were analyzed, alongside proposed improvements.
- Regression analysis was employed to evaluate arrangement consistency and effectiveness.
Main Results:
- Shortcomings were identified in the manufacturers' arrangement of both shade guides.
- Vitapan 3-D Master showed more consistency but decreased lightness and saturation in some groups.
- Arranging tabs by deltaE* relative to the lightest tab yielded high correlation coefficients (r2 values up to 0.98).
Conclusions:
- Arrangement based on total color difference from the lightest tab is recommended.
- Dividing tabs into adequate groups improves arrangement predictability.
- This approach offers a universally applicable method for organizing dental color standards.