It has been concern of dentists and patients that dental treatment procedure can cause infectious diseases via instrumentation and room air. Infections caused by direct contact with contaminated materials can be prevented by proper sterilization
and
asepsis technique. But infections transmitted by airborne microorganisms are easy to be overlooked. This paper is a study on the microbiological hygiene monitored by serial room air culture in different districts of dental OPD.
@ES The results were as followed:
@EN 1. Mean colony in each district was 17.8±6.6
2. Among the colonies, Gram(+)rod comprised 35.7%, Fungus 12.9%, Bacillus genus 25%, Gram(-)rod 1.4%, and Staphylococcos aureus 0.07%.
3. Mean colony count was significantly high in poorly ventilated and illuminated rooms, and significantly low in OPD operation room in which ultraviolet light is used during night time.
4. Mean colony count was significantly high in summer and low in winter. In summer, the proportion of Gram(-) rods and genus of Bacillus increased. Fungus count was high in spring and low in fall.
5. Monthly patient number has a weak correlation with the mean colony number.
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