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Synergistic Antimicrobial Action of Chlorhexidine and Ozone in Endodontic Treatment

机译：氯己定和臭氧在牙髓治疗中的协同抗菌作用

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Objectives. The aim of this study was to determine whether irrigation with sodium hypochlorite, chlorhexidine, and ozone gas, alone or in combination, were effective against Enterococcus faecalis and Candida albicans; these are microorganisms frequently isolated from teeth with periapical lesions resistant to endodontic treatment. Material and Methods. 220 single root teeth, recently extracted, were inoculated with Candida albicans and Enterococcus faecalis. The formulations tested were sodium hypochlorite at 1, 3, and 5% chlorhexidine at 0.2% and 2% and ozone gas applied for different periods of time. The combination of sodium hypochlorite at 5% and chlorhexidine at 2%, with gaseous ozone, were also assessed. For the most active treatments the mechanism of action was assessed through flow cytometry. Results. Sodium hypochlorite, chlorhexidine, and gaseous ozone alone were ineffective in completely eliminating the microorganisms. The association of chlorhexidine at 2% followed by ozone gas for 24 seconds promoted the complete elimination of Candida albicans and Enterococcus faecalis. Flow cytometry shows that ozone and chlorhexidine act differently, which could explain its synergic activity. Conclusions. This new disinfection protocol, combining irrigation with chlorhexidine at 2% and ozone gas for 24 seconds, may be advantageous when treating infected root canals.
机译：目标。这项研究的目的是确定用次氯酸钠，洗必泰和臭氧气体单独或组合灌溉对粪肠球菌和白色念珠菌是否有效。这些是经常从具有根尖周病变的牙齿中分离出来的对牙髓治疗有抵抗力的微生物。材料与方法。最近拔出的220颗单根牙接种了白色念珠菌和粪肠球菌。所测试的制剂是分别以0.2％和2％的1、3和5％氯己定的次氯酸钠和在不同时间段施加的臭氧气体。还评估了5％的次氯酸钠和2％的洗必太与气态臭氧的组合。对于最活跃的治疗，通过流式细胞仪评估其作用机理。结果。单独的次氯酸钠，洗必太和气态臭氧无法完全消除微生物。 2％的洗必泰和随后的24小时臭氧气体的结合促进了白色念珠菌和粪肠球菌的完全清除。流式细胞仪显示臭氧和洗必泰的作用不同，这可以解释其协同活性。结论。这种新的消毒方案结合2％的洗必泰冲洗液和24小时的臭氧气体冲洗，在治疗受感染的根管时可能是有利的。

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