What is the minimum filtration efficiency required for surgical masks used in a dental setting according to ASTM standards?

For aerosol-generating dental procedures, the CDC and OSHA recommend N95 respirators, which filter at least 95% of airborne particles. Standard surgical masks used in dentistry meet ASTM Level 1, 2, or 3 standards for fluid resistance and bacterial filtration efficiency (BFE of at least 95–98%). For procedures with high aerosol risk (e.g., ultrasonic scaling, high-speed handpieces), N95 or higher respirators are indicated. The 95% filtration standard (N95) is the benchmark referenced in dental infection control guidelines.