@misc{10481/86803,
year = {2021},
month = {2},
url = {https://hdl.handle.net/10481/86803},
abstract = {Objective: To determine in-vivo chromatic and whiteness changes produced by short-term dental dehydration.
Methods: Spectral reflectance of 452 upper incisors (226 centrals and 226 laterals) of 113 participants were
measured using a spectroradiometer at baseline and after short-term dehydration (minutes 2, 4, 6, 8 and 10). CIE
L*a*b* color coordinates (L*, a*, b*, C*ab and hab) and whiteness index for dentistry (WID) were calculated. Color
differences (ΔE00, ΔE∗
ab) and whiteness differences (ΔWID) were computed and interpreted based on their
respective 50:50% perceptibility (PT) and acceptability thresholds (AT). Statistical analysis was performed using
the related samples Wilcoxon signed-rank test.
Results: L* showed an increasing trend with dehydration, while a*, b*, C*ab and hab have a decreasing tendency.
All chromatic coordinates showed statistically significant differences (p <0.003) at each interval of dehydration
compared with baseline, except a* for all teeth. For ΔE00 and ΔE∗
ab values were higher than PT after 2 min of
teeth dehydration and higher than AT after 6 and 8 min, respectively. The percentage of teeth exceeding corresponding
PT was higher than 50% after 2 min. WID index increased with dehydration time, while whiteness
differences were clinically perceptible after 4 min. Statistically significant differences were found for WID between
all dehydration intervals (except 8− 10 min). The percentage of teeth exceeding whiteness PT was higher
than 50% after 6 min of teeth dehydration.
Conclusions: Short-term dental dehydration produces clinically unacceptable changes in tooth color and clinically
perceptible increase in tooth whiteness level.
Clinical significance: Clinical shade matching must be done within the first two minutes of any clinical procedure
that requires precise chromatic determination but implies a risk of tooth dehydration.},
organization = {Spanish Ministry of Science, Innovation and Universities PGC2018-101904-A-I00},
organization = {University of Granada A.TEP.280.UGR18},
publisher = {Elsevier},
keywords = {Dental dehydration},
keywords = {Color difference},
keywords = {Whiteness changes},
keywords = {Perceptibility thresholds},
keywords = {Acceptability thresholds},
title = {Impact of short-term dental dehydration on in-vivo dental color and whiteness},
doi = {10.1016/j.jdent.2020.103560},
author = {Ruiz López, Javier and Pulgar Encinas, Rosa María and Lucena Martín, Cristina and Peláez-Cruz, Priscilla and Cardona Pérez, Juan De La Cruz and Pérez Gómez, María Del Mar and Ghinea, Razvan Ionut},
}