An N95 respirator used in a dental setting is defined by its ability to filter airborne particles. What is the minimum filtration efficiency of an N95 respirator?

An N95 respirator is certified by NIOSH (National Institute for Occupational Safety and Health) to filter at least 95% of airborne particles 0.3 microns and larger, including aerosolized pathogens. The 'N' designation indicates it is not resistant to oil. In dentistry, N95 respirators are recommended when treating patients with aerosol-transmitted infectious diseases such as tuberculosis, COVID-19, or measles. Regular surgical masks do not provide adequate filtration against aerosolized particles; they protect against droplets and splatter but not fine aerosols.