During the ongoing COVID-19 pandemic, healthcare professionals are at the forefront of managing the highly infectious coronavirus. As the most common route of transmission is via aerosols and droplet inhalation, it is critical for healthcare workers to have the correct personal protective equipment (PPE) including gowns, masks and goggles. Surgical masks are not effective in preventing the influenza and SARS, so they are unlikely to be able to resist contaminated aerosols from entering the respiratory system. Therefore, it is vital to use respirators which have been proven to offer better protection against droplets, aerosols and fluid penetration and which form a tight seal around the mouth and nose. Various types of respirators are used in healthcare settings, such as half-mask filtering facepiece respirators (FFRs) and powered air-purifying respirators (PAPRs). The most commonly used FFR is the N95 disposable respirator, which is tight fitting and has a 95% or above particle filtering efficiency for a median particle size of 0.3 µm. This review discusses respirators, their purpose, types, clinical efficiency and proper donning and doffing techniques.

中文翻译：

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呼吸器在控制新型冠状病毒 (COVID-19) 在牙科保健提供者中传播中的作用：综述。

在持续的 COVID-19 大流行期间，医疗保健专业人员处于管理高传染性冠状病毒的最前沿。由于最常见的传播途径是通过气溶胶和飞沫吸入，因此医护人员必须拥有正确的个人防护设备 (PPE)，包括防护服、口罩和护目镜。外科口罩不能有效预防流感和SARS，因此它们不太可能抵抗受污染的气溶胶进入呼吸系统。因此，使用已被证明可以更好地防止飞沫、气溶胶和液体渗透并在口鼻周围形成紧密密封的呼吸器至关重要。各种类型的呼吸器用于医疗保健环境，例如半面罩过滤式面罩呼吸器 (FFR) 和动力空气净化呼吸器 (PAPR)。最常用的 FFR 是 N95 一次性呼吸器，它是紧密贴合的，对于 0.3 µm 的中值粒径具有 95% 或以上的颗粒过滤效率。这篇综述讨论了呼吸器、它们的用途、类型、临床效率和正确的穿脱技术。