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Combined Bleaching Technique Using Low and High Hydrogen Peroxide In-Office Bleaching Gel
Operative Dentistry
|February 27, 2016
Summary
Combined dental bleaching is effective and stable for 12 months. Using 20% hydrogen peroxide for in-office bleaching reduces tooth sensitivity (TS) risk and intensity compared to 35%.
Area of Science:
- Dental Aesthetics
- Operative Dentistry
- Biomaterials
Background:
- Tooth whitening is a common cosmetic dental procedure.
- Combined bleaching techniques aim to enhance efficacy and stability.
- Hydrogen peroxide and carbamide peroxide are common bleaching agents.
Purpose of the Study:
- To evaluate the efficacy, color stability, risk, and intensity of tooth sensitivity (TS) of combined bleaching techniques.
- To compare 20% and 35% hydrogen peroxide for in-office bleaching protocols.
Main Methods:
- Thirty patients underwent a single in-office bleaching session (20% or 35% hydrogen peroxide) followed by at-home bleaching (10% carbamide peroxide).
- Color change was assessed using the Vita Classical shade guide up to 12 months.
- Tooth sensitivity (TS) intensity was recorded using a five-point verbal scale.
Main Results:
- Both protocols achieved effective and stable whitening (average three shade guide units) for 12 months.
- The 35% hydrogen peroxide group exhibited a significantly higher risk (p=0.02) and intensity (p=0.04) of TS.
- No significant difference in TS intensity was noted immediately after in-office or during at-home bleaching phases.
Conclusions:
- Combined bleaching techniques are effective and stable for 12 months, irrespective of in-office hydrogen peroxide concentration.
- A 20% hydrogen peroxide in-office protocol resulted in lower risk and intensity of tooth sensitivity (TS).
