[The spread of the backspray under different working conditions]

Area of Science:

• Dentistry
• Infection Control
• Biomedical Engineering

Background:

• High-speed dental preparation instruments necessitate intensive spray cooling.
• This process increases aerosol generation and potential infection hazards for dental professionals due to spray rebound.
• Effective containment of spray rebound is crucial for maintaining a safe clinical environment.

Purpose of the Study:

• To quantify the spatial spread of spray rebound during simulated dental preparations.
• To evaluate the efficacy of a spraying mist exhaust system in reducing aerosol spread.
• To provide objective data on infection control measures in dental settings.

Main Methods:

• Simulated dental preparations were conducted on various tooth surfaces and patient positions.
• Photogrammetry was employed to objectively document equipment arrangement and measurement conditions.
• Spray rebound was measured with and without the use of a spraying mist exhaust system under clinical conditions.

Main Results:

• The use of high-speed instruments significantly increases spray rebound, posing an infection hazard.
• The spraying mist exhaust system demonstrated a reduction in spray rebound by 50% to 65%.
• Objective data classification through photogrammetry allowed for clear interpretation of measurement results.

Conclusions:

• Spraying mist exhaust systems are effective in mitigating infection risks associated with dental spray rebound.
• Implementing such exhaust systems is a vital measure for enhancing safety for dentists and their assistants.
• Further research into optimizing aerosol containment in dental procedures is warranted.