摘要翻译：
世界卫生组织最近的指南建议在新冠肺炎疫情期间推迟非必要的口腔保健，并呼吁对牙科手术期间产生的气溶胶进行研究。因此，本研究的目的是评估牙科诊所的牙科气溶胶扩散机制，并根据定量研究提供建议，以尽量减少感染在牙科诊所的传播。在牙科诊所的牙科手术中产生的气溶胶粒子的扩散和清除是在来源附近和办公室的角落测量的。我们研究了空气净化（开/关）、门条件（开/关）和颗粒大小对颗粒浓度时间分布的影响。结果表明，在最坏情况下，0.5μm颗粒的沉降需要95分钟，而较大颗粒的沉降需要更短的时间。测试的室内空气净化器加速去除时间至少比场景空气净化器关闭快6.3倍。空气中的粒子可能会从源头传输到房间的其他地方，即使在产生区的粒子浓度回到背景水平。这些结果对牙科办公室和类似建筑环境中感染疾病控制的相关政策制定和技术开发具有一定的参考价值。
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英文标题：
《In situ Measurement of Airborne Particle Concentration in a Real Dental
  Office: Implications for Disease Transmission》
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作者：
Maryam Ravazi, Zahid Butt, Mark H.E. Lin, Helen Chen, Zhongchao Tan
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最新提交年份：
2020
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分类信息：

一级分类：Quantitative Biology        数量生物学
二级分类：Other Quantitative Biology        其他定量生物学
分类描述：Work in quantitative biology that does not fit into the other q-bio classifications
不适合其他q-bio分类的定量生物学工作
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一级分类：Physics        物理学
二级分类：Fluid Dynamics        流体动力学
分类描述：Turbulence, instabilities, incompressible/compressible flows, reacting flows. Aero/hydrodynamics, fluid-structure interactions, acoustics. Biological fluid dynamics, micro/nanofluidics, interfacial phenomena. Complex fluids, suspensions and granular flows, porous media flows. Geophysical flows, thermoconvective and stratified flows. Mathematical and computational methods for fluid dynamics, fluid flow models, experimental techniques.
湍流，不稳定性，不可压缩/可压缩流，反应流。气动/流体力学，流体-结构相互作用，声学。生物流体力学，微/纳米流体力学，界面现象。复杂流体，悬浮液和颗粒流，多孔介质流。地球物理流，热对流和层流。流体动力学的数学和计算方法，流体流动模型，实验技术。
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一级分类：Physics        物理学
二级分类：Medical Physics        医学物理学
分类描述：Radiation therapy. Radiation dosimetry. Biomedical imaging modelling.  Reconstruction, processing, and analysis. Biomedical system modelling and analysis. Health physics. New imaging or therapy modalities.
放射治疗。辐射剂量学。生物医学成像建模。重建、处理和分析。生物医学系统建模与分析。健康物理学。新的成像或治疗方式。
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英文摘要：
  Recent guidelines by WHO recommend delaying non-essential oral health care amid COVID-19 pandemic and call for research on aerosol generated during dental procedures. Thus, this study aims to assess the mechanisms of dental aerosol dispersion in dental offices and to provide recommendations based on a quantitative study to minimize infection transmission in dental offices. The spread and removal of aerosol particles generated from dental procedures in a dental office are measured near the source and at the corner of the office. We studied the effects of air purification (on/off), door condition (open/close), and particle sizes on the temporal concentration distribution of particles. The results show that in the worst-scenario scenario it takes 95 min for 0.5 um particles to settle, and that it takes a shorter time for the larger particles. The indoor air purifier tested expedited the removal time at least 6.3 times faster than the scenario air purifier off. Airborne particles may be transported from the source to the rest of the room, even when the particle concentrations in the generation zone return to the background level. These results are expected to be valuable to related policy making and technology development for infection disease control in dental offices and similar built environments.
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PDF链接：
https://arxiv.org/pdf/2008.10998