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Effect of Low-level Laser Therapy on Post-bleaching Sensitivity and Color Change

NCT03514290 · Status: COMPLETED · Phase: NA · Type: INTERVENTIONAL · Enrollment: 21

Last updated 2018-05-02

No results posted yet for this study

Summary

Objective: The objective of this clinical study was to evaluate low-level laser (LLL) therapy in tooth sensitivity and in effecting color change after in-officer bleaching treatment across three weeks of treatment.

Methods: Twenty-one volunteers were evaluated through the split-mouth model, so that the right and left maxillary/mandibular quadrants were randomized and allocated to one of two groups: GPLACEBO - the laser tip was positioned without the emission of light (placebo effect) + tooth bleaching with 35% hydrogen peroxide (HP); GLASER - treated with LLL + tooth bleaching with 35% HP. To assess tooth sensitivity, a modified visual analogue scale (VAS) was used after an evaporative stimulus (stimulated pain) and a daily pain questionnaire (unstimulated pain) was also applied. A spectrophotometer was used to measure the color. Three bleaching sessions were performed, with intervals of 7 days. Sensitivity results were tested using Friedman test for intra-group evaluation and Wilcoxon test for inter-group evaluation and ANOVA for color change.

Conditions

  • Tooth Bleaching
  • Low-level Laser Therapy
  • Dentin Sensitivity
  • Clinical Trial

Interventions

RADIATION

Low-lever laser

Received Low-lever laser therapy using the infrared spectrum, with a wavelength of 808 nm in its active medium AsGaAl (arsenic-gallium-aluminum), at two points: on the central of cervical and medial regions of incisors, canines and premolars in the corresponding hemi-arch. At each point, 60 J/cm2 was applied during 16 seconds with an irradiance of 3.75 W/cm² using the therapeutic visible infrared device.

OTHER

Tooth bleaching

Three 15-minute applications of 35% hydrogen peroxide gel (Whiteness HP, FGM®, Joinville, SC, Brazil) were carried out, totaling 45 minutes in each of the four bleaching sessions, with an one-week interval between applications.

OTHER

Placebo

The laser tip was positioned similarly to experimental group but without light irradiation

Sponsors & Collaborators

  • Universidade Federal do Para

    lead OTHER

Principal Investigators

  • Cecy M Silva · Federal University of Para

Study Design

Allocation
RANDOMIZED
Purpose
TREATMENT
Masking
DOUBLE
Model
CROSSOVER

Eligibility

Min Age
18 Years
Max Age
30 Years
Sex
ALL
Healthy Volunteers
Yes

Timeline & Regulatory

Start
2016-07-11
Primary Completion
2016-08-08
Completion
2016-09-30

Countries

  • Brazil

Study Locations

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Read the full study record

This page highlights key information. For complete eligibility criteria, study locations, investigator contacts, and the full protocol, visit the original record on ClinicalTrials.gov.

View NCT03514290 on ClinicalTrials.gov