不同消毒剂对口腔综合治疗台水路消毒效果研究

目的比较不同消毒剂对口腔综合治疗台水路(DUWLs)的消毒效果。方法将18台DUWLs随机分成4组,分别为过氧化氢消毒剂(H2O2)组、次氯酸钠消毒剂(NaClO)组、过氧化氢银离子消毒剂(Sanosil)组、蒸馏水冲洗(DW)组。采用对应消毒剂对DUWLs进行消毒,采集三用枪和高速手机水样,比较消毒前后细菌数量。结果消毒前各组细菌数量比较,差异无统计学意义(均P0.05),各组DUWLs细菌数严重超标(均3 000 CFU/mL)。除DW组外,消毒后各组DUWLs细菌数量大幅度下降(均100 CFU/mL),消毒后细菌数量低于消毒前(均P0.001)。3种消毒剂消毒后1周,不同时间各组细菌数量比较,差异有统计学意义(三用枪:Day1—Day5,均P0.05;高速手机:Day2、Day3和Day5,均P0.05)。消毒后第3天三用枪(H2O2组和NaClO组)、消毒后第4天高速手机(H2O2组和NaClO组)、消毒后第5天三用枪和高速手机(Sanosil组)细菌数量均超过美国疾病预防控制中心提出的口腔医疗卫生用水标准。3组消毒剂在消毒后1周细菌数量均超过或接近消毒前水平。结论 3种消毒剂均可有效降低水路中的细菌载量。与其他消毒剂相比,Sanosil在消毒后抑制细菌生长更具优势。

Disinfection efficacy of different disinfectants on dental unit waterlines

ObjectiveTo compare the disinfection efficacy of different disinfectants on dental unit waterlines (DUWLs). Methods18 sets of DUWLs were randomly divided into 4 groups, and disinfected or treated with  hydrogen peroxide (H2O2) disinfectant, sodium hypochlorite  (NaClO) disinfectant, hydrogen peroxide silver ion disinfectant(Sanosil),and  distilled water (DW) respectively. Water specimens from triple syringes and high speed handpieces were taken, bacterial count before and after disinfection were compared. ResultsBefore disinfection,no significant differences in bacterial counts were found among four groups (all P>0.05), bacterial counts of DUWLs of all groups severely exceeded the standard(all＞3 000 CFU/mL）. After disinfection,except DW group, bacterial counts of DUWLs of the other groups declined dramatically  (all ＜100 CFU/mL）, bacterial count after disinfection were all obviously lower than  before disinfection （all P＜0.001).One week after disinfection, bacterial counts among three disinfectant groups in different time periods were statistically different (triple syringes: Day1—Day5,all P<0.05; high speed handpieces:  Day2,Day3 and Day5，all P＜0.05). Day3 after disinfection of triple syringes by H2O2 and  NaClO, Day4 after disinfection of high speed handpieces by H2O2 and  NaClO, and Day5 of triple syringes and high speed handpieces by Sanosil all exceeded the standard of  Center for Disease Control and Prevention of America. One week after disinfection, bacterial counts of three disinfection groups all exceeded or approximated to that before disinfection. ConclusionThree types of disinfectants can all effectively reduce bacterial load in DUWLs. Compared with  other disinfectants, Sanosil has advantage of inhibiting bacterial growth after disinfection.