Tooth discoloration
Conditions
Interventions
The study is a randomized clinical trial, split-mouth, double-blind.
Fifty-six patients were selected for this study, in which two bleaching sessions will be held with an interval of one week. Both i
In the control with 38% hydrogen peroxide (n = 28), the bleaching was performed for a consecutive period 45 min and 40 min, respectively. In addition, the bleaching gels were applied with and without
Procedure/surgery
E06.420.750
Sponsors
Universidade Federal do Amazonas - Faculdade de Odontologia
Universidade Federal do Amazonas - Faculdade de Odontologia
Eligibility
Age
18 Years to No maximum
Inclusion criteria
Inclusion criteria: Patients included in this clinical trial were men and women over 18 years; who were in good general and oral health; with six maxillary and mandibular anterior teeth without caries lesions or restorations; the right superior incisor should be shade C2 or darker as judged by comparison with a VITA Classical value-oriented shade guide (Vita Zahnfabrik, Bad Säckingen, Germany)
Exclusion criteria
Exclusion criteria: Pregnant or lactating patients were excluded; smokers; bruxism habits; severe internal tooth discoloration (tetracycline stains, fluorosis, pulpless teeth); orthodontic appliance users; gingival recessed; exposed dentine; who took anti-inflammatories, analgesics or antioxidants.
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| The color difference between the initial condition and after bleaching (1 week and 1 month) will be assessed using the Vita Classical (visual) and Vita Bleachedguide color scales and also with the Vita Easyshade (instrumental) spectrophotometer. Expected Outcome 1: 38% PH and 37% PC gels will produce similar whitening effectiveness when not sonically activated.;Outcome 1: In both visual and color instrumental evaluation, the whitening effectiveness was found to be the same for both 37% carbamide peroxide and 38% hydrogen peroxide.;Expected Outcome 2: The use of sonic activation will not change the effectiveness of whitening with 37% carbamide peroxide.;Outcome found 2: In both visual and instrumental color evaluation, it was observed that the whitening effectiveness was higher in the control and experimental groups where the sonic activation was not used. | — |
Secondary
| Measure | Time frame |
|---|---|
| Number of patients reporting spontaneous pain at any time during the tooth whitening technique and up to 48 hours after the procedure through self-report. This number will be transformed into percentage of patients with pain and will be called absolute risk of dental sensitivity. Expected Outcome 3: The use of sonic activation will not influence the sensitivity risk associated with 37% carbamide peroxide bleaching..;Outcome found 3: There was a statistically significant increase in the absolute sensitivity risk in the groups with sonic activation of the whitening gel, with the hydrogen peroxide group at 38% H presenting the highest percentage (55%).;The intensity of dental sensitivity will be evaluated using the visual analog scale VAS (0-10) and will be presented as mean and standard deviation at different periods (during tooth whitening, up to 1 h, from 1 h to 24 h and from 24 to 48 h after -whitening). Expected Outcome 4: The use of sonic activation will not influence the intensity of sensitivity associated with 37% carbamide peroxide bleaching.;Outcome found 4: Tooth sensitivity was higher in the groups where the sonic activation of the gel was performed, both in the 37% carbamide peroxide group and in the 38% hydrogen peroxide group. | — |
Countries
Brazil
Contacts
Public ContactJuliana de Sá
Universidade Federal do Amazonas - Faculdade de Odontologia
Outcome results
None listed