Sterilizing handpieces | Registered Dental Hygienist (RDH ...
On the other hand, when the internal motor was contaminated, the microbes were transmitted to the prophy angle in 47% of 160 other samples. In another in vivo study of 20 subjects, 75% of the 420 samples obtained from low-speed handpiece/prophy angle systems were contaminated with oral flora. 2.