Nisha Swet, Shivamallu Avinash Bettahalli, Gujjari Sheela Kumar, Shashikumar Pratibha, Ali Nada Musharraf, Kulkarni Madhuri
Department of Periodontology, J.S.S Dental College and Hospital, JSS Academy of Higher Education and Research, Mysuru, Karnataka, India.
Department Of Microbiology, J.S.S Medical College and Hospital, JSS Academy of Higher Education and Research, Mysuru, Karnataka, India.
Contemp Clin Dent. 2021 Jul-Sep;12(3):282-288. doi: 10.4103/ccd.ccd_374_20. Epub 2021 Sep 21.
Aerosols and droplets contaminated with bacteria and blood are produced during ultrasonic scaling. Measures to control aerosol contamination in dental clinics are recommended by the Centers for Disease Control and Prevention. This study aimed to evaluate the efficacy of preprocedural boric acid (BA) mouthrinse in reducing bacterial contamination in dental aerosols generated during ultrasonic scaling.
This was a randomised clinical trial in 90 systemically healthy subjects (25-55 yrs) diagnosed with chronic periodontitis who were allocated into three groups of 30 subjects each to receive, Group A - 0.12% chlorhexidine (CHX), Group B - 0.75% BA and Group C-water, as a preprocedural rinse for 1 min. The aerosol generated while performing ultrasonic scaling for 30 min was collected at three locations on blood agar plates. Incubation of the blood agar plates at 37°C for next 48 h for aerobic culture was performed and subsequently colony-forming units (CFUs) were counted.
CFUs in Group A were significantly reduced compared with Group B ( < 0.001). When we compare CFUs in all the three groups, CFUs in Groups A and B were statistically significantly reduced compared with Group C ( < 0.001). Furthermore, it was also observed that the assistant's chest area had lowest CFUs whereas patient's chest area had highest.
This study recommends routine use of preprocedural mouthrinse as a measure to reduce bacterial aerosols generated during ultrasonic scaling and that 0.12% CHX gluconate is more effective than 0.75% BA mouthwash in reducing CFUs count.
超声洁治过程中会产生被细菌和血液污染的气溶胶和飞沫。疾病控制与预防中心推荐了控制牙科诊所气溶胶污染的措施。本研究旨在评估术前使用硼酸（BA）漱口水在减少超声洁治过程中产生的牙科气溶胶中细菌污染的效果。
这是一项随机临床试验，研究对象为90名被诊断为慢性牙周炎的全身健康受试者（25 - 55岁），他们被分为三组，每组30名受试者，分别接受以下术前漱口1分钟的处理：A组 - 0.12%氯己定（CHX），B组 - 0.75% BA，C组 - 水。在进行30分钟超声洁治时产生的气溶胶在血琼脂平板上的三个位置收集。将血琼脂平板在37°C下进行需氧培养48小时，随后计数菌落形成单位（CFU）。
与B组相比，A组的CFU显著降低（<0.001）。当比较所有三组的CFU时，A组和B组的CFU与C组相比在统计学上显著降低（<0.001）。此外，还观察到助手胸部区域的CFU最低，而患者胸部区域的CFU最高。
本研究建议常规使用术前漱口水作为减少超声洁治过程中产生的细菌气溶胶的措施，并且0.12%葡萄糖酸氯己定在减少CFU计数方面比0.75% BA漱口水更有效。
