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Impact of short-term dental dehydration on in-vivo dental color and whiteness.

Authors
  • Ruiz-López, Javier1
  • Pulgar, Rosa2
  • Lucena, Cristina3
  • Pelaez-Cruz, Priscilla4
  • Cardona, Juan C5
  • Perez, Maria M6
  • Ghinea, Razvan7
  • 1 Department of Optics, Faculty of Science, University of Granada, Campus Fuente Nueva, Edificio Mecenas, S/N 18071, Granada, Spain. Electronic address: [email protected] , (Spain)
  • 2 Department of Stomatology, Faculty of Dentistry, University of Granada, Campus de Cartuja S/N, Granada, 18071, Spain. Electronic address: [email protected] , (Spain)
  • 3 Department of Stomatology, Faculty of Dentistry, University of Granada, Campus de Cartuja S/N, Granada, 18071, Spain. Electronic address: [email protected] , (Spain)
  • 4 Department of Stomatology, Faculty of Dentistry, University of Granada, Campus de Cartuja S/N, Granada, 18071, Spain. Electronic address: [email protected] , (Spain)
  • 5 Department of Optics, Faculty of Science, University of Granada, Campus Fuente Nueva, Edificio Mecenas, S/N 18071, Granada, Spain. Electronic address: [email protected] , (Spain)
  • 6 Department of Optics, Faculty of Science, University of Granada, Campus Fuente Nueva, Edificio Mecenas, S/N 18071, Granada, Spain. Electronic address: [email protected] , (Spain)
  • 7 Department of Optics, Faculty of Science, University of Granada, Campus Fuente Nueva, Edificio Mecenas, S/N 18071, Granada, Spain; Department of Physics, Faculty of Sciences, University of Craiova, 13 AI Cuza Street, Craiova, 200585, Romania. Electronic address: [email protected] , (Spain)
Type
Published Article
Journal
Journal of dentistry
Publication Date
Feb 01, 2021
Volume
105
Pages
103560–103560
Identifiers
DOI: 10.1016/j.jdent.2020.103560
PMID: 33352224
Source
Medline
Keywords
Language
English
License
Unknown

Abstract

To determine in-vivo chromatic and whiteness changes produced by short-term dental dehydration. 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, ΔEab*) 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. 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 ΔEab* 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. Short-term dental dehydration produces clinically unacceptable changes in tooth color and clinically perceptible increase in tooth whiteness level. 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. Copyright © 2020 Elsevier Ltd. All rights reserved.

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