Colorimetric evaluation after in-office tooth bleaching with violet LED: 6- and 12-month follow-ups of a randomized clinical trial

Objectives To evaluate the long-term outcomes of in-office bleaching with violet LED light (LED) alone or combined with carbamide (CP) or hydrogen (HP) peroxides. Methods Volunteers of a previous short-term study were recalled for 6- and 12-month follow-ups, according to the following interventions...

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Bibliographic Details
Published in:Clinical oral investigations 2022, Vol.26 (1), p.837-847
Main Authors: Kury, Matheus, Wada, Erica Eiko, da Silva Palandi, Samuel, Picolo, Mayara Zaghi Dal, Giannini, Marcelo, Cavalli, Vanessa
Format: Article
Language:English
Subjects:
Bleaching
Clinical trials
Color
Colorimetry
Dentistry
Ethics
Follow-Up Studies
Free radicals
Humans
Hydrogen Peroxide
Intervention
Light
Medicine
Original Article
Peroxides
Teeth
Tooth Bleaching
Tooth Bleaching Agents
Urea
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Summary:Objectives To evaluate the long-term outcomes of in-office bleaching with violet LED light (LED) alone or combined with carbamide (CP) or hydrogen (HP) peroxides. Methods Volunteers of a previous short-term study were recalled for 6- and 12-month follow-ups, according to the following interventions ( n  = 18/group): LED, CP, LED/CP, HP, and LED/HP. The objective color (ΔE ab , ΔE 00 ) and whiteness index (ΔWI D ) changes were calculated applying the CIELab coordinates’ values obtained using a spectrophotometer. A visual shade guide determined the tooth’s subjective color change (ΔSGU). Data were submitted to one-way ANOVA or Welch’s ANOVA, following appropriate post hoc tests ( α  = 5%). Results The LED and CP groups exhibited the lowest ΔE ab , ΔE 00 , and ΔSGU ( p  
ISSN:1432-6981
1436-3771
DOI:10.1007/s00784-021-04062-9