Photodiagnosis Photodyn Ther 2021 Jun 8:102385. Epub 2021 Jun 8.
Postgraduate Program in Biophotonics Applied to Health Sciences, Universidade Nove de Julho, UNINOVE, São Paulo, Brazil. Electronic address:
Background: Although there is little evidence showing the effectiveness of violet LED on in-office tooth whitening, there are some studies which have reported satisfactory results. This double-blind randomized controlled clinical trial aimed to evaluate the effect of a violet light emission diode (LED) (405nm) system, used in-office, on tooth whitening, sensitivity, use of medication after whitening and quality of life.
Methods: Eight patients were randomized into 4 groups (n = 20): G1 - violet LED, G2 - 35% carbamide peroxide (CP) and violet LED, G3 only CP 35% and G4 35% hydrogen peroxide (HP). Read More