ABSTRACT
Objective@#To compare the disinfection effects of 500 mg/L chlorine-containing disinfectant and 3% hydrogen peroxide disinfectant applied to the threaded plastic hose at the fixed end of the saliva suction pipe of the oral comprehensive treatment table after diagnosis and treatment of patients in stomatology to provide a basis for clinical cleaning and disinfection.@* Methods @#The fixed ends of saliva suction pipes of 12 comprehensive treatment tables in the dental pulp department and maxillofacial surgery were selected as the research objects. The absorption was randomly divided into two groups and a control group: experimental group 1 with 500 mg/L chlorine disinfectants and experiment 2 group with 3% hydrogen peroxide disinfectant rinse disinfection and the control group with 0.9% sterile saline flushing pipe once a week for four weeks. Before and after washing and disinfection, samples from the inner wall of the threaded plastic hose interface were collected for bacterial culture and colony count, and colony counts within and between groups were compared before and after disinfection. Statistical analysis was conducted using SPSS 24.0 software.@*Results@#The baseline number of bacterial colonies in the first three groups was balanced, with no statistically significant difference (χ2 = 0.538, P = 0.764). The number of bacterial colonies after washing and disinfection was lower than that before washing and disinfection. The difference between 500 mg/L chlorine-containing disinfectant and 3% hydrogen peroxide disinfectant before and after disinfection was highly significant (Z = -4.801, P<0.001; Z = -4.429, P<0.001). There was no significant difference between the disinfection effect of 500 mg/L chlorine-containing disinfectant and 3% hydrogen peroxide disinfectant, but they were both better than the control group (χ2 = 18.070, P<0.001).@*Conclusion@#Disinfecting the saliva suction pipe with disinfectant between diagnosis and treatment can effectively reduce the bacterial contamination at the fixed end threaded plastic hose interface of the saliva suction pipe. The disinfection method is simple and convenient, and it is worth applying in the oral clinic.