Comparative study of the effect of two different disinfection methods on indoor air disinfection in comprehensive dental clinics
Objective To study the air disinfection effect of plasma sterilisation and ultraviolet plane disinfection in the com-prehensive dental treatment room,and to compare the effective and suitable air disinfection methods.Methods 360 patients underwent ultrasonic cleaning,and two different disinfection methods were used to disinfect the comprehensive dental treatment room and set up sampling points immediately after the cleaning.120 cases were set up with sampling points in front of the shelter,control group Ⅰ with ultraviolet planar disinfection,and experimental group Ⅰ with plasma steric disinfection,each group with 60 cases.120 randomly distribu-ted sampling points(there was a possibility that the sampling points were located at the back of the shelter),control group Ⅱ for ultravi-olet planar disinfection,experimental group Ⅱ for plasma sterilisation,60 cases each;120 cases distributed sampling points at the back of the shelter,control group Ⅲ for ultraviolet planar disinfection,experimental group Ⅲ for plasma sterilisation,60 cases each.Results Control group Ⅰ and experimental group Ⅰ before and after the experiment,the median difference between the total number of colonies before and after the experiment was 1.85 and 1.90,the experimental group Ⅰ air colony number decreased compared with the control group Ⅰ,the difference was not statistically significant(P＞0.05).The median difference between the total number of colonies in experimental group Ⅱ and control group Ⅱ before and after the experiment was respectively 2.80 and 1.70(P＜0.05),and the de-crease in the number of air colonies in experimental group Ⅱ was higher than that in control group Ⅱ.The median difference between the total number of colonies in experimental group Ⅲ and control group Ⅲ before and after the experiment was respectively 2.25 and 0.30(P＜0.05),and the decrease in the number of air colonies in experimental group Ⅲ was higher than that in control group Ⅲ.Conclusion The effectiveness of plasma sterilisation method for air disinfection in comprehensive dental treatment room is better than that of ultraviolet plane disinfection method,which is worthy of clinical promotion and application.
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