Related Experiment Video
Updated: Jun 22, 2026
04:40
Impact of Common Fruit Juices and Toothbrushing on the Discoloration of Primary Teeth
Published on: March 27, 2026
Development of a whiteness index for dentistry
Wen Luo1, Stephen Westland, Roger Ellwood
1School of Design, University of Leeds, Leeds, UK.
Journal of Dentistry
|June 9, 2009
Summary
Researchers developed a new whiteness index (WIO) that accurately measures perceived tooth whiteness. This optimized formula improves upon existing methods for dental aesthetic evaluations.
Area of Science:
- Dental Science
- Color Science
- Perception Science
Background:
- Accurate measurement of tooth whiteness is crucial for dental aesthetics.
- Existing whiteness indices may not precisely correlate with human perception of tooth color.
Purpose of the Study:
- To develop a novel whiteness index that aligns with the perception of tooth whiteness.
- To evaluate the efficacy of existing indices in measuring tooth whiteness.
Main Methods:
- Conducted psychophysical experiments with observer panels under standardized and clinical viewing conditions.
- Compared existing whiteness and yellowness indices against perceived tooth whiteness.
- Utilized Pearson coefficient of determination and '% wrong decision' methods for index evaluation.
Main Results:
- Developed a new whiteness formula, WIO, by optimizing the CIE whiteness formula (WIC).
- WIO demonstrated superior performance in predicting tooth whiteness in laboratory settings.
- Validation with 88 NHS patients under clinical conditions confirmed WIO's predictive accuracy.
Conclusions:
- The newly developed whiteness formula (WIO) is effective for predicting perceived tooth whiteness.
- WIO offers an improved objective measure for dental shade assessment.
- The study validates the formula's applicability in real-world clinical scenarios.
