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Does the Bleaching Gel Application Site Interfere With the Whitening Result? A Randomized Clinical Trial
Lmb Esteves1, T C Fagundes2, P H Dos Santos3
1Lara Maria Bueno Esteves, DDS, MS student, Department of Preventive and Restorative Dentistry, São Paulo State University (UNESP), School of Dentistry Araçatuba, São Paulo, Brazil.
Operative Dentistry
|January 3, 2022
Summary
The location where 35% hydrogen peroxide (H2O2) bleaching gel is applied does not affect overall tooth whitening results. However, applying gel only to the cervical region increased spontaneous tooth sensitivity.
Area of Science:
- Dental Aesthetics
- Materials Science in Dentistry
Background:
- Tooth whitening is a popular cosmetic dental procedure.
- The application technique of bleaching agents may influence efficacy and patient experience.
Purpose of the Study:
- To investigate how the application site of 35% hydrogen peroxide (H2O2) bleaching gel impacts tooth color change and postoperative sensitivity.
- To compare cervical, incisal, and full facial application sites.
Main Methods:
- Thirty patients were divided into three groups based on gel application site (cervical, incisal, full facial).
- Color changes were measured using spectrophotometry (ΔE, Wid).
- Sensitivity was assessed via questionnaires and thermosensory analysis (TSA).
Main Results:
- Chromatic alteration was independent of the gel application site.
- The incisal region showed momentary color improvement, but overall results were similar across groups by treatment end.
- Spontaneous sensitivity was higher in the cervical application group.
- The full facial application group experienced less thermal sensitivity influence.
Conclusions:
- Tooth whitening efficacy is not dependent on the bleaching gel's application site.
- Concentrating 35% H2O2 gel on the cervical region increases spontaneous sensitivity.
- Thermal sensitivity can persist for up to 14 days post-treatment, with full facial application showing less impact.
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