Effect of hydrogen peroxide on developing plaque and gingivitis in man

Area of Science:

• Oral microbiology
• Periodontology
• Preventive dentistry

Background:

• Plaque and gingivitis development are influenced by oral microbiota composition.
• Hydrogen peroxide (H2O2) is a known antimicrobial agent with potential applications in oral hygiene.

Purpose of the Study:

• To evaluate the impact of a hydrogen peroxide-releasing mouthwash on human plaque microbiota.
• To assess the effect of the mouthwash on plaque formation and gingivitis development.
• To investigate the pathogenecity of plaque under mouthwash use as the sole oral hygiene measure.

Main Methods:

• A double-blind, placebo-controlled crossover study involving 14 dental students.
• Participants used either an active mouthwash (Amosan) or placebo as their only oral hygiene measure for two 2-week periods.
• Plaque and gingival indices were measured, and bacterial samples were analyzed at 7 and 14 days.

Main Results:

• The hydrogen peroxide mouthwash significantly reduced plaque amount and gingivitis.
• It effectively prevented the colonization of key anaerobic bacteria, including filaments, fusiforms, motile/curved rods, and spirochetes.
• Bacterial analysis confirmed a shift in plaque composition away from anaerobic species.

Conclusions:

• Mouthwashes releasing hydrogen peroxide can effectively control plaque and gingivitis development.
• H2O2 may inhibit the colonization and multiplication of anaerobic bacteria in oral plaque.
• This suggests a role for hydrogen peroxide mouthwashes in oral hygiene, particularly when mechanical cleaning is limited.