2019年12月暴发于湖北武汉的新型冠状病毒肺炎（corona virus disease 2019，COVID-19）在短期内扩散至全国，部分患者出现严重的急性呼吸综合征，已成为国际关注的重大公共卫生事件。携带新型冠状病毒的COVID-19患者是主要的传染源，人群普遍易感，因此切断传播途径是首要的防控措施。由于口腔科治疗的特殊性，诊疗过程中会形成大量的气溶胶，交叉感染的风险高，为疫情防控带来困难。该文就口腔科诊疗过程中气溶胶形成特点和气溶胶传播防控方法进行重点讨论。

Corona virus disease 2019 (COVID-19), which broke out in Wuhan, HuBei in December, 2019, spread around the country in a short term. Some infected patients suffered severe acute respiratory syndrome. It has become a major public health event of international concern. COVID-19 patients are the main source of transmission and most people get infection easily, so the current main prevention method is interrupting the pathway of transmission. The dental treatments are very special becathese operations produce substantial aerosols and lead a high risk of cross-infection, which brings challenge for epidemic prevention and control. In this paper, the characteristics of aerosols and prevention methods of aerosol transmission in dental clinics are mainly discussed.