The specific objective of this study is: * Evaluate and quantify colorimetric changes in young permanent anterior teeth; * Compare the efficiency and efficacy of three gels used for self-administered home whitening and an over the counter whitening strip; * Analyze the increase in dental sensitivity in adolescent patients submitted to home whitening with 6% and 7.5% hydrogen peroxide with and without the addition of calcium (whitening strips); * Assess sensitivity, comfort and acceptance of whitening strips by patients; * Assess patient satisfaction with the method and material used for home whitening.
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Discoloration
Timeframe: Change of teeth color after 7 days of the beginning of treatment