This is a randomized, controlled, double-blind and repeated-measures clinical trial evaluated the photoactivation of hydrogen peroxide gels in different concentrations with blue or violet LED in terms of whitening efficacy and tooth sensitivity.
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
OTHER
Masking
DOUBLE
Enrollment
40
Tooth whitening with 6% hydrogen peroxide gel (Lase Peroxide Lite, DMC, São Carlos, Brazil) activated by violet LED
Tooth whitening with 6% hydrogen peroxide gel (Lase Peroxide Lite, DMC, São Carlos, Brazil) activated by blue LED
Tooth whitening with 35% hydrogen peroxide gel (Lase Peroxide Sensy, DMC, São Carlos, Brazil) activated by violet LED
Federal University of Pará
Belém, Pará, Brazil
Color
A operator measured the color of the six upper anterior teeth using a digital spectrophotometer (VITA Easyshade V, Wilcos, Petrópolis, RJ, Brazil).
Time frame: Color assessment was carried out before bleaching, 1 week after bleaching and 3 months after bleaching
Bleaching Sensitivity
The degree of tooth sensitivity of patients was recorded using a visual analogue scale (VAS) from 0 to 10, where 0 represents no tooth sensitivity and 10 represents the greatest tooth sensitivity ever felt by the patient.
Time frame: Assessments were carried out three times: before bleaching, immediately after bleaching, and 24 hours after bleaching.
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Tooth whitening with 35% hydrogen peroxide gel (Lase Peroxide Sensy, DMC, São Carlos, Brazil) activated by blue LED