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This double-blind randomized clinical trial evaluated the effect of 1.5% potassium oxalate on pain sensitivity control and color change after home tooth whitening. It also evaluated the influence of potassium oxalate on health-related quality of life (HRQOL) and on the degree of patient satisfaction after bleaching treatment.
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| Label | Type | Description | Intervention Names |
|---|---|---|---|
| Group G1 | Other | Home bleaching treatment (Carbamide Peroxide (PC) 22%) + placebo gel |
|
| Group G2 | Experimental | Home bleaching treatment (Carbamide Peroxide (PC) 22%) + 1.5% Potassium Oxalate gel |
|
| Name | Type | Description | Arm Group Labels | Other Names |
|---|---|---|---|---|
| Carbamide Peroxide (PC) 22%) + placebo gel | Other | Application of one drop of Polanight bleaching agent (SDI, SP, Brazil) on each corresponding tooth in a tray that was used for 45 minutes a day, for a period of twenty-one days. After the bleaching treatment, the participants were instructed to wash the trays under running water and dry them. The volunteers were instructed to apply a small amount of placebo gel, without active ingredient, with color, texture and odor similar to 1.5% oxalate gel (Painless, BM4, SC, Brazil) in the spaces related to the vestibular portions of the teeth trays, which were used for 10 minutes. |
| Measure | Description | Time Frame |
|---|---|---|
| dentin sensitivity | evaluation of dentinal sensitivity during treatment through a daily questionnaire, using a visual analogue scale with values from 0 to 10, with higher values indicating a worse level of pain. | 21 days after the start of the whitening treatment |
| dental color assessment | Color evaluation was performed using the EasyshadeAdvanced spectrophotometer (Vita-Zahnfabrik, GE, Germany), using the CIE L*a*b* system. | 21 days and 1 month after the bleaching treatment |
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Inclusion Criteria:
Exclusion Criteria:
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| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| Federal University of Pará | Belém | Pará | 66075-110 | Brazil |
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|
| Carbamide Peroxide (PC) 22%) + Potassium Oxalate gel 1.5% | Other | Application of one drop of Polanight bleaching agent (SDI, SP, Brazil) on each corresponding tooth in a tray that was used for 45 minutes a day, for a period of twenty-one days. After the bleaching treatment, the participants were instructed to wash the trays under running water and dry them with absorbent paper. The volunteers applied a small amount of 1.5% potassium oxalate gel (Painless, BM4, SC, Brazil) in the spaces relative to the vestibular portions of the tray's teeth, which were used for 10 minutes. |
|
| ID | Term |
|---|---|
| D003807 | Dentin Sensitivity |
| ID | Term |
|---|---|
| D014076 | Tooth Diseases |
| D009057 | Stomatognathic Diseases |
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| ID | Term |
|---|---|
| D000077463 | Carbamide Peroxide |
| ID | Term |
|---|---|
| D010545 | Peroxides |
| D010087 | Oxides |
| D000838 | Anions |
| D007477 | Ions |
| D004573 | Electrolytes |
| D007287 | Inorganic Chemicals |
| D017382 | Reactive Oxygen Species |
| D005609 | Free Radicals |
| D017601 | Oxygen Compounds |
| D014508 | Urea |
| D000577 | Amides |
| D009930 | Organic Chemicals |
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