@misc{10481/99179,
year = {2020},
month = {12},
url = {https://hdl.handle.net/10481/99179},
abstract = {Objective. To evaluate color and whiteness changes of natural tooth structure under
nine white LED illuminants recently proposed by CIE.
Methods. From spectral reflectance factors of 36 caries-free upper central incisors,
corresponding colors under illuminant D65 and CIE 1931 standard colorimetric
observer were computed for all tested illuminants, using the chromatic adaptation
transform CAT16. Color differences (CIELAB and CIEDE2000 units) and whiteness (
and indices) from teeth illuminated by CIE standard illuminants (D65 and A) and white
LED illuminants were calculated. The appearance of 630 pairs of teeth under all
illuminants was also evaluated.
Results. Color gamuts from 36 teeth under tested illuminants showed similar volume
and shape in CIELAB color space, but their centers of gravity changed in many
different directions with respect to colors under D65 or A illuminants: Considering
colors under D65/A, color shifts produced by white LED illuminants were in the ranges
2.0-8.6/1.1-7.0 CIELAB units (1.4-8.2/0.6-6.8 CIEDE2000 units). Average and values
for the 36 teeth under different illuminants ranged from -5.8 to +19.3 and from -7.7 to
+11.1, respectively. Considering 630 pairs of teeth, average color differences (mainly
lightness differences) were below 0.5 CIELAB units (0.3 CIEDE2000 units), and
average whiteness differences ranged 8.1-10.7 for (23.4-25.1 for ).
Significance. Using CIE LED illuminants, most changes in color and whiteness for
individual tooth were above typical threshold values of perceptibility and acceptability in
dentistry. However, considering pairs of teeth, the average color and whiteness
differences under all tested illuminants were very similar.},
organization = {Departamento de Optica},
organization = {Ministry of Science and Innovation of the National Govern-ment of Spain, research projects FIS2016-80983-P and PID2019-107816GB-I00, with support from European Regional Devel-opment Fund (ERDF). Operative Program FEDER-ANDALUSIA2014-2020, research project A-FQM-30-UGR20. National Nat-ural Science Foundation of China, grant numbers 61575090and 61775169. Research project PGC2018-101904-A-100 fromthe Spanish Ministry of Science, Innovation and Universities},
publisher = {Elsevier},
keywords = {White light-emitting diode},
keywords = {Color},
keywords = {Whiteness},
keywords = {CIEDE2000},
keywords = {CAT16},
title = {Color inconstancy of natural teeth measured under white light-emitting diode illuminants},
doi = {https://doi.org/10.1016/j.dental.2020.10.001},
author = {Melgosa Latorre, Manuel and Ruiz López, Javier and Li, Changjun and García López, Pedro Antonio and Della Bona, Alvaro and Pérez Gómez, María Del Mar},
}