Microbial aerosols in general dental practice
Microbial aerosols in general dental practice
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DOI：
10.1038/sj.bdj.4800859a
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发表时间：
2000-12-23
影响因子：
2.6
通讯作者：
Marsh, PD
中科院分区：
文献类型：
--
作者：
Bennett, AM;Fulford, MR;Marsh, PD
目的测定普通牙科诊所空气中微生物气溶胶的浓度，并进行定量的微生物风险评估。方法对英国西南部6家普通牙科诊所的12次治疗过程中的空气微生物进行连续采样。每立方米空气中的菌落形成单位（cfu.m（-3））。然而，在12次访视中的6次中，至少检测到一个具有更高细菌数量的峰值浓度。峰值浓度与假定的口腔链球菌的回收率增加有关，表明这些气溶胶来自患者的口腔。这些气溶胶峰值在30分钟内消失，并且没有检测到传播到等候区。峰值浓度与机械洁治程序相关（47%的程序产生峰值），在较小程度上与腔体制备相关（11%）。未检测到气溶胶化血液。结论这些数据已用于生成一个框架，用于量化工作人员在普通牙科诊所中接触气溶胶化微生物病原体的风险。例如，牙医和他们的助手可能比普通公众暴露于结核分枝杆菌的风险略高。使用已被证明可以防止雾化微生物的面部密封面罩可以减少这种暴露。
Objective To measure the concentration of microbial aerosols in general dental practices and to use this information to carry out quantitative microbiological risk assessments.Methodology Microbial air sampling was carried out continuously during 12 treatment sessions in 6 general dental practices in the South West of England.Results The microbial aerosol concentration in treatment rooms was generally less than 10(3) colony forming units per cubic metre of air (cfu.m(-3)). However, in 6 out of the 12 visits, at least one peak concentration with much higher numbers of bacteria was detected. The peak concentrations were associated with increased recoveries of presumptive oral streptococci suggesting these aerosols originated from the mouths of patients. These aerosol peaks dissipated within 30 minutes and no dissemination into waiting areas was detected. The peak concentrations were associated with mechanical scaling procedures (47% of procedures giving rise to a peak) and to a lesser extent by cavity preparation (11%). No aerosolised blood was detected.Conclusions The data have been used to generate a framework for quantifying risk of exposure of staff to aerosolised microbial pathogens in general dental practice. For example, dentists and their assistants may have a slightly higher risk of exposure to Mycobacterium tuberculosis than the general public. The use of face seal masks that have been shown to protect against aerosolised micro-organisms may reduce this exposure.