“…Methods that have been shown to be effective toward this end, such as ultraviolet irradiation, aerosolized chemical disinfectants, and good air filtration'7 or laminar air purge,18 all require structural alterations of the operatories. The use of masks and eye shields designed for both patient and dentist have been studied by Baily et al, 19 Travaglini and Larato,20 and Kortsch.2' However, a mouthrinse has only a slight effect on the oral microbial flora; and the masks, with the exception of bulky fiber glass filter masks'9-21 are, for the most part, ineffective.…”