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机构地区:[1]上海交通大学医学院附属第九人民医院.口腔医学院口腔内科
出 处:《上海口腔医学》2005年第5期507-510,共4页Shanghai Journal of Stomatology
基 金:上海市口腔医学重点实验室基金(036505013)~~
摘 要:目的:观察十二烷基硫酸钠(sodiumdoecylsulfate,SDS)促进血链菌生物膜表面脱落的效果,并对其和氯己定、玉洁纯联合应用的效果进行比较。方法:在模拟人口腔环境的人工口腔内,形成4h血链菌生物膜,分别放入300mmol·L-1SDS、300mmol·L-1SDS+2%氯己定和300mmol·L-1SDS+0.3%玉洁纯中,作用时间为3、10、30min,然后应用激光共聚焦扫描显微镜和死菌/活菌荧光染色技术相结合,比较其促进血链菌生物膜表面脱落的作用,对所得数据进行方差分析。结果:300mmol·L-1SDS应用于4h血链菌生物膜,可以有效促进细菌脱落,300mmol·L-1SDS和2%氯己定联合应用的效果较差;300mmol·L-1SDS和0.3%玉洁纯联合应用于生物膜3min,细菌几乎全部脱落。结论:300mmol·L-1SDS和0.3%玉洁纯联合应用,对促进菌斑生物膜脱落的作用最强。PURPOSE: To investigate the effects of sodium doecyl sulfate on Streptococcus sanguis biofilm. METHODS: Streptococcus sanguis biofilm was formed on saliva-coated glass(SCG) in a flow culture system, then exposed to different dental plaque control agents for 3,10,30 minutes including A:300mmol·L^-1 sodium doecyl sulfate (SDS); B: 2% chlorhexidine combined with 300 mmol·L^-1 SDS; C:0.3%triclosan combined with 300 mmol·L^-1 SDS. Confocal laser scanning microscopy and vital/dead fluorescent staining technique(vital stained green, dead stained red) were combined to observe biofilm thickness, bacterial density and viability, analysis of variance was used for comparison. RESULTS: The biofilm thickness and bacteria density reduced after treatment by 300 mmol·L^-1 SDS. However, there was no significant difference after treatment by 2% chlorhexidine combined with 300 mmol·L^-1 SDS; When treated by 0.3% triclosan combined with 300 mmol·L^-1 SDS, most or all of the bacteria detached from the surface and dispersed. CONCLUSIONS: The combination of SDS (aimed at detachment) and triclosan(aimed at killing bacteria) may be most effective in controlling biofilm.
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