Evaluation of aerosol contamination during debonding procedures

Area of Science:

• Dental Aerosol Research
• Infectious Disease Transmission in Dentistry
• Orthodontic Procedure Safety

Background:

• Air turbine handpieces used in orthodontics generate aerosols.
• These aerosols may carry infectious agents, posing risks to dental professionals and patients.
• The effectiveness of pre-procedural mouth rinses in mitigating this risk is not well-established.

Purpose of the Study:

• To quantify aerosol generation during orthodontic debonding.
• To assess the efficacy of a 0.2% chlorhexidine gluconate mouth rinse in reducing microbial aerosol contamination.
• To inform infection control strategies in orthodontic practices.

Main Methods:

• Collection of aerosol samples using blood agar plates on face shields and dental chairs.
• Comparison of microbial colony forming units (CFU) between baseline, control, and debonding groups.
• Evaluation of CFU counts before and after a 1-minute 0.2% chlorhexidine gluconate mouth rinse during debonding.

Main Results:

• Aerosol contamination significantly increased during the debonding procedure compared to baseline and control groups (P < .01).
• No significant reduction in CFU was observed after the chlorhexidine mouth rinse.
• Orthodontists face substantial aerosol exposure during adhesive removal.

Conclusions:

• Orthodontic debonding procedures create a high-risk environment for aerosolized infectious agents.
• Pre-procedural chlorhexidine mouth rinse is ineffective in reducing microbial aerosol contamination.
• Implementation of barrier protection measures is crucial for infection control during these procedures.