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A study of the prevention of environmental pollution caused by infections aerozol from dental treatment

牙科治疗中气溶胶感染环境污染的防治研究

基本信息

批准号：
07672235
负责人：
SUYAMA Yuji
金额：
$ 1.54万
依托单位：
TOKYO DENTAL COLLEGE
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
1995
资助国家：
日本
起止时间：
1995 至 1996
项目状态：
已结题

项目摘要

Blood and drill dust from dental plaque microorganisms, teeth, and filling materials can cause environmental pollution in the dental clinic. Currently, as a preventive measure against air pollution from a patient's mouth during dental treatment. Detction of oral streptococci in the air-borne is used as an index on the presence of aerosol in consequence of the use of tooth preparation with high-speed air turbines. The air-borne bacteria in the dental clinics consisted of Guram-positive cocci (33%), Guram-positive bacilli (37%), Myces (38%). We recognized 30.6% oral-alpha-haemolytic streptococci according to the growth shown on Mitis-Salivarius agar disk, while 4.5% recognized on blood agar disk. But we could not find oral-alpha-streptococci from the airborne bacterium in the dental clinic's waiting room and in the research room.It was proved that oral-alpha-haemolytic streptococci was useful as an indicator for splashing infection control in the present study. We tested the eliminating effects by the Extra-Oral Vacuum Aspirator (EOVA) with the plaque solution aerosol and the aerosol from drilling a tooth by examining the distribution of floating aerosol in the air turbine's tank when a plaque solution was sprayd and when a human tooth was drilled with a plaque solution. We concluded that infectious aerosol increases in diameter with the drilling of human teeth to the size of about 0.5-5.0 mum, which is microbiologically and hygienically hazardous and also can be inhaled without much difficulty.In order to examine environmental pollution in the dental clinic during tooth preparation and operation area during scaling procedures using ultra sonic scaler. The EOVA was therefore viewed as an effective method for reducing air pollution in the dental clinic, and should be used when treating patients with certain infectious diseases. In tooth preparation with high-speed air turbines, tooth preparation dust from the patient's mouth is one risk for airborne infections.

牙菌斑微生物、牙齿和填充物产生的血液和钻屑会造成牙科诊所的环境污染。目前，作为一项预防措施，防止病人在牙科治疗期间口腔内的空气污染。在空气中检测口腔链球菌被用作气溶胶存在的指标，因为使用高速空气涡轮机进行牙齿准备。口腔门诊空气传播细菌主要为葛兰阳性球菌（33%）、葛兰阳性杆菌（37%）、真菌（38%）。根据Mitis-Salivarius琼脂盘上的生长情况，我们识别出30.6%的口服溶血性链球菌，而血液琼脂盘上的识别率为4.5%。但在牙科诊所的候诊室和研究室，我们没有从空气传播的细菌中发现口腔α链球菌。本研究证明口服溶血性链球菌可作为飞溅感染控制的一项指标。我们通过检测空气涡轮气罐中悬浮气溶胶的分布情况，测试了牙菌斑溶液喷雾和牙菌斑溶液钻牙时，口腔外真空抽吸器（EOVA）与牙菌斑溶液气溶胶的消除效果。我们得出的结论是，随着人类牙齿的钻孔，传染性气溶胶的直径会增加到约0.5-5.0 μ m，这在微生物和卫生方面都是危险的，并且可以很容易地吸入。为了检测口腔诊所预备牙区及手术区在超声除垢过程中的环境污染情况。因此，EOVA被视为减少牙科诊所空气污染的有效方法，在治疗某些传染病患者时应使用。在使用高速空气涡轮机进行牙齿准备时，患者口腔中的牙齿准备粉尘是空气传播感染的风险之一。