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Table 1 Summary of experimental conditions

From: Tooth whitening with hydrogen peroxide in adolescents: study protocol for a randomized controlled trial

Group Presence or absence of change in tooth color Application site Treatment
1 Presence Maxillary and mandibular anterior teeth Placebo gel without hydrogen peroxide - Formula e Açao – Sao Paulo/SP
- without activating source
2 Presence Maxillary and mandibular anterior teeth 6.0% hydrogen peroxide –White Class with Calcium, FGM – Joenville/SC
- without activating source
3 Presence Maxillary and mandibular anterior teeth 7.5% hydrogen peroxide –White Class with Calcium – FGM – Joenville/SC
- without activating source
4 Presence Maxillary and mandibular anterior teeth 7.5% hydrogen peroxide – Oral-B 3D White, Oral-B - EUA
- without activating source