Jb. Epstein et al., ASSESSING VIRAL RETENTION - AND ELIMINATION IN ROTARY DENTAL INSTRUMENTS, The Journal of the American Dental Association, 126(1), 1995, pp. 87-92
The authors of this article used a laboratory model of herpes simplex
virus infection to assess the potential for contamination of dental ha
ndpieces by a human viral pathogen. They found that although all the h
andpieces in the study were fitted with antiretraction valves, it was
not until the units were flushed internally and disinfected externally
that the pathogens were eliminated.