Dental Hygiene Concepts Practice Test 2025 – The Complete All-in-One Guide to Mastering DHYG Concepts!

Mask filtration efficiency is critical in healthcare settings, particularly when protecting against airborne pathogens. A mask categorized as Level 3 according to ASTM (American Society for Testing and Materials) standards is designed with a specific filtration capability.

The correct choice indicates that Level 3 masks have a Bacterial Filtration Efficiency (BFE) of 95% against particles that are 3 microns in size. This means that such masks are effective at filtering out a significant majority of bacteria from the air inhaled, making them suitable for using in situations where the risk of exposure to infectious agents is higher.

Masks with a BFE of 95% at 3 microns are particularly important in clinical environments where procedures may generate aerosols or when a higher level of protection is needed for both the wearer and the patients. This filtration efficiency helps to minimize the risk of airborne transmission of infections.

Other options mention varying efficiencies or particles that do not align with the established standards for a Level 3 mask. Therefore, understanding the BFE and the specific filtration capabilities helps practitioners select the appropriate personal protective equipment for their roles in patient care.