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This parallel, randomized, and controlled clinical trial will assess the effect of a single prior session of in-office dental bleaching on time required to achieve satisfactory tooth color with at-home bleaching. Participants enrolled will randomly allocated to receive or not a single session of dental bleaching with 35% hydrogen peroxide applied for 45 min. Following, all participants will use customized trays filled with 10% carbamide peroxide for 1h per day until obtain satisfactory results. The primary outcome will be the number of days necessary to obtain satisfactory tooth color. Furthermore, tooth sensitivity and color changes measured with spectrophotometer will be assessed.
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| Label | Type | Description | Intervention Names |
|---|---|---|---|
| Combined technique | Experimental | A single session of in-office tooth bleaching will be performed with 35% hydrogen peroxide for 45 minutes. Following, the teeth will be further bleached with customized trays filled with 10% carbamide peroxide and used for 1h per day. |
|
| At-home bleaching | Active Comparator | The teeth will be bleached only with customized trays filled with 10% carbamide peroxide and used for 1h per day. |
|
| Name | Type | Description | Arm Group Labels | Other Names |
|---|---|---|---|---|
| Bleaching Agents | Drug | In-office tooth bleaching with 35% hydrogen peroxide in a single application of 45 minutes. |
|
| Measure | Description | Time Frame |
|---|---|---|
| Time to tooth color satisfaction | Time in days performing at-home bleaching necessary to participant reports that is satisfied with the tooth color obtained | up to 1 month after beginning the tooth bleaching procedures |
| Measure | Description | Time Frame |
|---|---|---|
| Color change | Values of delta E measured with a spectrophotometer from color at baseline | up to 1 month after beginning the tooth bleaching procedures |
| Tooth sensitivity | Maximum level of tooth sensitivity reported by participants using an analogue visual scale. The distance between the patient's marking and the no pain border was recorded in cm. |
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Inclusion Criteria:
Exclusion Criteria:
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| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| Universidade Federal de Sergipe | Aracaju | Sergipe | 49060100 | Brazil |
| PubMed Identifier | Type | Citation | Retractions |
|---|---|---|---|
| 26919081 | Background | Rezende M, Ferri L, Kossatz S, Loguercio AD, Reis A. Combined Bleaching Technique Using Low and High Hydrogen Peroxide In-Office Bleaching Gel. Oper Dent. 2016 Jul-Aug;41(4):388-96. doi: 10.2341/15-266-C. Epub 2016 Feb 26. | |
| 20884923 | Background | Cardoso PC, Reis A, Loguercio A, Vieira LC, Baratieri LN. Clinical effectiveness and tooth sensitivity associated with different bleaching times for a 10 percent carbamide peroxide gel. J Am Dent Assoc. 2010 Oct;141(10):1213-20. doi: 10.14219/jada.archive.2010.0048. |
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| ID | Term |
|---|---|
| D014075 | Tooth Discoloration |
| ID | Term |
|---|---|
| D014076 | Tooth Diseases |
| D009057 | Stomatognathic Diseases |
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| ID | Term |
|---|---|
| D057886 | Bleaching Agents |
| ID | Term |
|---|---|
| D016877 | Oxidants |
| D020313 | Specialty Uses of Chemicals |
| D020164 | Chemical Actions and Uses |
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| Bleaching Agents | Drug | At-home tooth bleaching with 10% carbamide peroxide for 1 hour per day. |
|
| 1, 2, 3, and 4 week after beginning the tooth bleaching procedures |