Abstract
The efficacy of a newly-developed anti-cross-contamination device in dentistry, the Air Flushing Clean System (AFCS), was tested under experimental and clinical conditions. In the experimental situation, a dental air turbine handpiece with or without AFCS was contaminated with two bacterial strains, Staphylococcus aureus FDA209P and Streptococcus mutans ATCC25175. After contamination with these bacteria, the handpieces were subjected to two disinfecting methods. Residual bacteria inside the handpiece or an air/water line were cultured and counted, and compared with controls. In this experiment, with AFCS but no dental vacuum suction, wiping of the handpiece with 70% ethanol gauze reduced the count of S. aureus by 99%. No bacterial contamination in the air/water line was detected after exchanging with an autoclaved handpiece. With AFCS and dental vacuum suction, bacterial contamination in the air/water line, as well as in the interior of the handpiece, was not detected. These results indicate that AFCS could reduce bacterial contamination within the air turbine handpiece more effectively than the conventional handpiece regardless of whether or not the dental vacuum suction was used.
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