Effectiveness of an external pipeline cleaning system on improving disinfection effect of dental unite waterlines
OBJECTIVE To analyze the effectiveness of an external integrated pipeline cleaning system on the disin-fection of dental unite waterlines(DUWLs).METHODS In March 2023,4 dental unites with independent water storage tank were selected in each of endodontic department and emergency-general department,and control group and experimental group were set up.Among them,the control group was disinfected with 25 mg/L chlorine-con-taining disinfectant,while the experimental group was disinfected with the external pipeline cleaning system,and water samples from the independent water reservoirs,combination springe and dental high-speed handpiece before disinfection,immediately after disinfection,the second day after disinfection,the third,the fourth,the fifth,and the sixth days after disinfection were collected for bacterial culture and detection.Meanwhile,the time of manual disinfection operation in control group and the time of disinfection by pipeline cleaning system in experimental group were recorded respectively.RESULTS There was no significant difference between the bacterial values of the two waterways before disinfection.Compared with the control group,the bacterial colony values of the water sam-ples of the experimental group was significantly lower in the immediate post-disinfection period and remained ef-fectively clean during the observation cycle after three consecutive days of cyclic disinfection(mean value＜100 CFU/ml,P＜0.05).The analysis of the difference between the endodontic department and emergency-gener-al department showed that there was no significant difference in the disinfection effect of the external pipeline cleaning system on the independent water reservoirs of the dental unites between the two departments,but in the experimental group,the bacteria value of water sample from the Endodontics department in the combination springe and the dental high-speed handpiece were significantly lower than that of the emergency-general depart-ment(P＜0.05).In terms of labor and time cost,the manual operation time of the external pipeline cleaning sys-tem in the experimental group was about 2 min,while the manual operation time of the conventional process in the control group was about 20 min.CONCLUSION The external pipeline cleaning system could significantly improve the water disinfection effect of the dental unites waterlines(DUWLs),and enables the waterlines of a dental treat-ment table to maintain an effective clean state for a certain period after cyclic disinfections and effectively reduces the time and labor cost of disinfecting the line of a clinical dental treatment table as compared to the routine disin-fection procedure.
Dental uniteDental unite waterlinesDisinfection of waterlinesExternal pipeline cleaning system
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