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Tooth-Specific Personalization of In-Office Whitening Time: A Three-Case Report
Matheus de Castro Costa1, Priscila Toninatto Alves de Toledo1, Diana Gabriela Soares1
1Department of Operative Dentistry, Endodontics and Dental Materials, Bauru School of Dentistry, University of São Paulo (USP), São Paulo, Brazil, usp.br.
Case Reports in Dentistry
|August 13, 2026
Summary
Tooth whitening can cause sensitivity, especially in thinner teeth. Reducing application time alone did not eliminate this, indicating a need for individualized dental treatments for better patient comfort and results.
Area of Science:
- Dentistry
- Dental Materials Science
Background:
- Dental sensitivity is a common issue during tooth whitening.
- This sensitivity can negatively impact patient comfort and treatment acceptance.
Purpose of the Study:
- To evaluate the effectiveness of a modified in-office tooth whitening protocol using a calcium-containing 35% hydrogen peroxide gel.
- To assess the impact of reduced application times on tooth sensitivity and aesthetic outcomes, considering anatomical variations.
Main Methods:
- A case report involving three patients undergoing three in-office whitening sessions at 7-day intervals.
- Utilized a 35% hydrogen peroxide gel with a calcium-containing agent.
- Implemented a differential application time protocol, reducing exposure from 40 to 20 minutes, especially for incisors.
Main Results:
- All patients experienced some degree of tooth sensitivity, particularly in mandibular incisors, despite reduced application times.
- A uniform aesthetic outcome was achieved across all treated teeth.
- High patient satisfaction with the aesthetic results was reported.
Conclusions:
- Reducing application time alone is insufficient to fully control tooth sensitivity during whitening, especially in teeth with thinner enamel and dentin.
- Individualized bleaching protocols considering dental anatomy are necessary to optimize both sensitivity management and aesthetic results.
- Further strategies beyond reduced application time may be required for managing sensitivity in vulnerable teeth.
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