Detection results of the total number of bacterial colonies in dental diagnosis and treatment water in 35 medical institutions in Chongqing
Objective To understand the hygienic quality of dental diagnosis and treatment water in medical institutions at all levels in Chongqing,and to provide theoretical basis for improving the quality of oral water.Methods From June 2022 to June 2023,a stratified random sampling method was used to select 35 medical institutions in Chongqing to conduct sampling of dental diagnosis and treatment water and detection of total bacterial colony count.The qualified rate of water samples was determined by referring to the National Standards for Drinking Water Quality.The comparison of rates was conducted by x2 test,and P＜0.05 was considered to be statistically significant.Results A total of 170 water samples were collected from the dental department of 35 medical institutions in Chongqing,of which 133 were qualified,with a qualified rate of 78.2％.Among the water samples that exceeded the standards,the total number of bacterial colonies reached a maximum of over 100 000 CFU/ml.In addition to the qualified rate of dental source water was 100％,the highest qualified rate was mouthwash(82.3％)and the lowest was dental handpiece water(66.7％).The qualified rates of water for dental diagnosis and treatment were 87.8％in first-level hospitals,66.7％in second-level hospitals and 82.6％in third-level hospitals,respectively,and the difference was statistically significant(x2=7.696,P=0.021).There was no statistically significant difference in the qualified rate of water samples with or without filtration treatment equipment(x2=0.824,P=0.346).Conclusions The pollution of dental diagnosis and treatment water in medical institutions at all levels in Chongqing was serious.It is suggested that the relevant standards and specifications of dental water should be formulated as soon as possible to improve the hygiene quality of dental water.
medical institutionsdental chair unitsdiagnosis and treatment watertotal number of bacterial colonies
万方数据
维普
