Evaluation method of infectiosity pollution by the air-born bacteria in dentistry clinic.

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-Sali varius琼脂盘上的生长情况，我们识别出30.6%的口腔-α，γ-溶血性链球菌，而血液琼脂盘上的识别率为4.5%。但在口腔门诊候诊室和研究室均未发现口腔-α-γ溶血性链球菌。口腔-α-γ溶血性链球菌使用唾液滴法作为监测口腔治疗时液滴感染和临床环境污染的指标更有效，可作为检测口腔临床环境污染的有效手段。结合牙钻后2 h口腔-α-γ溶血性链球菌的检测结果，分析了空气传播细菌状态监测的必要性。我们测试了空气净化系统（CLEAN PARTITON）对牙菌斑溶液气溶胶和钻牙产生的气溶胶的消除效果，通过检测空气涡轮气罐中悬浮气溶胶在喷牙菌斑溶液和用牙菌斑溶液钻牙时的分布情况。

Blood and drill dust from dental plaque microorganisms, teeth, and filling materials can cause environmental polllution in the dental clinic. Currently, as a preventive measure against air pollution from a patient's mouth during dental treatment. Detetion 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-α,γ-haemolytic streptococci according to the growth shown on Mitis-Sali varius agar disk, while 4.5% recognized on blood agar disk. But we could not find oral-α-γ haemolytic streptococci from the airborne bacterium in the denal clinic's waiting room and in the research room. Oral-α-γ haemolytic streptococci using Mitis Salivarius ager showed more efficiency as the index in monitoring droplet infection at dental treatments and pollution of the in-clinic environment, thus considered as an efficient procedure in detection environmental pollution in the dental clinic. With detection of oral-α-γ haemolytic streptococci two hours after tooth-drilling, necessity of monitoring on standing of air-borne bacteria was considered. We tested the eliminating effects by the air-cleaning system (CLEAN PARTITON) with the plaque solution aerosol and the aerosol from drilling a tooth by examing the distriution of floating aerosol in the air turbine's tank when a plaque solution was sprayed and when a human tooth was drilled with a plaque solution.