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

U

Universidade Federal do Para

Status

Completed

Conditions

Low-level Laser Therapy
Dentin Sensitivity
Tooth Bleaching
Clinical Trial

Treatments

Radiation: Low-lever laser
Other: Placebo
Other: Tooth bleaching

Study type

Interventional

Funder types

Other

Identifiers

NCT03514290
UFPara-003

Details and patient eligibility

About

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.

Full description

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.

Enrollment

21 patients

Sex

All

Ages

18 to 30 years old

Volunteers

Accepts Healthy Volunteers

Inclusion criteria

  • Do not have previous dental sensitivity
  • The canine had to be shade A2 or darker.

Exclusion criteria

  • Enamel hypoplasia
  • Gingival recession
  • Dentin exposure
  • Visible cracks on buccal enamel
  • Pulpitis

Trial design

Primary purpose

Treatment

Allocation

Randomized

Interventional model

Crossover Assignment

Masking

Double Blind

21 participants in 2 patient groups, including a placebo group

GPLACEBO
Placebo Comparator group
Description:
the laser tip was positioned without the emission of light (placebo effect) + tooth bleaching with 35% hydrogen peroxide (HP).
Treatment:
Other: Tooth bleaching
Other: Placebo
GLASER
Experimental group
Description:
treated with Low-lever laser + tooth bleaching with 35% hydrogen peroxide (HP).
Treatment:
Other: Tooth bleaching
Radiation: Low-lever laser

Trial contacts and locations

1

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Data sourced from clinicaltrials.gov

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