Dental Caries Clinical Trial
Official title:
The Impact of Hydrogen Peroxide (H₂O₂) Fumigation on Bacterial Level in Dental Office Environment: A Clinical Trial Investigation
The study's null hypothesis posits no significant difference in bacterial levels in the dental office environment before and after implementing hydrogen peroxide (H₂O₂) fumigation. The study comprised 30 participants, 18 females and 12 males, all diagnosed with moderate caries decay (ICDAS 3 and 4) in their mandibular molars, averaging 42.2 ± 8.3 years in age. Sample size calculations for 30 microbiological plates in each group utilized G*Power software (Kiel University, Germany), factoring in prior research, with a significance level of 0.05, effect size (d) of 0.72, 95% confidence interval, and 85% power. Aerobic bacterial content in the dental office air was assessed using the Koch sedimentation method. The study employed 60 Petri dishes with Columbia Agar and 5% Sheep Blood. During caries treatment, thirty plates were opened and sealed 40 minutes later, while another set of thirty plates was opened and closed 60 minutes post-fumigation. Measurements were taken 1 meter above the ground and 2 meters from the patient's mouth. After 48 hours of incubation at 37°C, microbiological contamination was calculated as CFUs (colony-forming units) in one cubic meter using the formula: L = a × 1000 / (πr² × k). Fumigation involved a 20-minute treatment with 6% hydrogen peroxide biosanitizer (Saniswiss, Switzerland) via a compressed air device (Fumi-Jet, Kormed, Poland). The process included 3 minutes of fumigation and a 17-minute waiting period for the chemotoxic effect, with 45 ml of 6% hydrogen peroxide sprayed in a 20 m² room.
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