Reduction of microbial concentration in the air of dental operating rooms. I. High-efficiency particulate air filters.
D000391:Air Microbiology; D001419:Bacteria / Q000302:isolation & purification; D003428:Cross Infection / Q000517:prevention & control*; D003777:Dental Prophylaxis; D003814:Dentistry, Operative; D005374:Filtration; D009873:Operating Rooms; D014465:Ultrasonics