Improved tooth bleaching combining ozone and hydrogen peroxide--A blinded study

Area of Science:

• Dental materials science
• Aesthetic dentistry

Background:

• Tooth discoloration is a common aesthetic concern.
• Hydrogen peroxide (H2O2) is a widely used bleaching agent.
• Investigating novel methods to enhance bleaching efficacy is crucial.

Purpose of the Study:

• To compare the effectiveness of tooth bleaching using ozone in conjunction with H2O2 versus H2O2 alone.
• To evaluate the impact of ozone on the shade change of teeth.

Main Methods:

• 70 extracted teeth were divided into two groups.
• Group 1: treated with 38% H2O2 followed by 60s of ozone exposure.
• Group 2: treated with 38% H2O2 alone. Shade values (L*a*b*, Vita Classic) were measured at baseline and post-treatment.

Main Results:

• Both treatments resulted in statistically significant tooth lightening (P ≤ 0.05).
• The combination of H2O2 and ozone yielded significantly greater shade improvement compared to H2O2 alone (P<0.001).
• Ozone application after initial H2O2 bleaching further enhanced tooth lightness (P<0.001).

Conclusions:

• Combining 38% H2O2 with ozone is a more effective tooth bleaching method than using 38% H2O2 alone.
• Ozone acts as an effective enhancer for hydrogen peroxide-based tooth bleaching.