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In-office bleaching with complete cervical third protection protocol: A split-mouth, double-blind, randomized
Juliana L de Sá1, Jardel S Silva1, Fernando J Herkrath2
1School of Dentistry, Federal University of Amazonas, Manaus, Amazonas, Brazil.
American Journal of Dentistry
|October 24, 2021
Summary
Protecting the cervical third of teeth with a gingival dam during in-office bleaching did not significantly alter tooth sensitivity or bleaching effectiveness compared to traditional application methods.
Area of Science:
- Dental materials science
- Cosmetic dentistry
- Clinical research
Background:
- In-office dental bleaching is a popular cosmetic procedure.
- Gingival protection is crucial to prevent sensitivity during bleaching.
Purpose of the Study:
- To compare the bleaching sensitivity and effectiveness of in-office bleaching using a modified gingival dam technique versus a traditional method.
- The modified technique involves complete cervical third protection.
Main Methods:
- A double-blind, split-mouth randomized clinical trial involving 35 participants.
- Gingival barrier placement was compared: traditional (sulcus only) vs. extended (cervical third).
- Bleaching sensitivity was assessed using standardized scales; effectiveness was measured with a digital spectrophotometer.
Main Results:
- No statistically significant differences were found in the risk or intensity of bleaching sensitivity between the two groups.
- Bleaching effectiveness, measured by color change (ΔEab, ΔE00, ΔWi) in the cervical area, also showed no significant difference after 30 days.
Conclusions:
- Extending gingival dam protection to the cervical third of teeth does not reduce bleaching sensitivity.
- This modified technique does not compromise the overall bleaching effectiveness of in-office treatments.
