Horsophonphong Sivaporn, Chestsuttayangkul Yada, Surarit Rudee, Lertsooksawat Wannee
Department of Pediatric Dentistry, Faculty of Dentistry, Mahidol University, Bangkok Thailand.
Dental Department, Rajavithi Hospital, Bangkok Thailand.
J Dent Res Dent Clin Dent Prospects. 2021 Summer;15(3):197-202. doi: 10.34172/joddd.2021.033. Epub 2021 Aug 25.
Ultrasonic scaling generates aerosols and splatters contaminated with microorganisms, increasing the risk of disease transmission in the dental office. The present study aimed to evaluate the effectiveness of extraoral suction (EOS) units in aerosol and splatter reduction during ultrasonic scaling. Ultrasonic scaling was conducted on a dental manikin headset to simulate a scaling procedure. Water containing at a concentration of 10 colony-forming units per milliliter and 1% fluorescein solution was used as the water supply of the scaler. The scaling procedure was conducted with a high-volume evacuator (HVE) or the combination of HVE and an EOS unit. de Man-Rogosa-Sharpe agar plates were placed at different distances surrounding the dental chair. Filter papers were placed at various positions surrounding the oral cavity and on areas of the body. Bioaerosols were detected at every sampling site and could travel as far as 150 cm from the oral cavity. The combination of HVE and EOS significantly reduced the total number of bacterial colonies in the air ( < 0.001). Dissemination of the stain was in the range of 20 cm from the oral cavity. The maximum contaminated surface area was at the 4 o'clock position from the oral cavity. The combination of EOS and HVE significantly reduced the contaminated area ( < 0.05). The stain was also found on the wrists, chest, abdomen, and lap of the operator and assistant. The lap was the most contaminated area of the body. EOS was effective in reducing the bioaerosols and splatters generated during ultrasonic scaling.
超声洁治会产生被微生物污染的气溶胶和飞沫，增加了牙科诊所内疾病传播的风险。本研究旨在评估口外抽吸（EOS）装置在超声洁治过程中减少气溶胶和飞沫方面的有效性。在牙科人体模型头戴上进行超声洁治以模拟洁治过程。将每毫升含10个菌落形成单位的水和1%荧光素溶液用作洁治器的供水。使用大容量吸引器（HVE）或HVE与EOS装置的组合进行洁治过程。将德氏-罗氏-夏普琼脂平板放置在牙科椅周围的不同距离处。将滤纸放置在口腔周围的各个位置以及身体部位。在每个采样点都检测到了生物气溶胶，其可传播至距口腔150厘米远的地方。HVE与EOS的组合显著降低了空气中细菌菌落的总数（<0.001）。污渍的传播范围在距口腔20厘米内。最大污染表面积位于距口腔4点钟方向的位置。EOS与HVE的组合显著减少了污染面积（<0.05）。在操作者和助手的手腕、胸部、腹部和大腿上也发现了污渍。大腿是身体上污染最严重的部位。EOS在减少超声洁治过程中产生的生物气溶胶和飞沫方面是有效的。
