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Comparative antibacterial efficacies of hydrodynamic and ultrasonic irrigation systems in vitro

机译:流体动力和超声冲洗系统的体外抗菌效果比较

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Introduction To ensure root canal treatment success, endodontic microbiota should be efficiently reduced. The in vitro bactericidal effects of a hydrodynamic system and a passive ultrasonic irrigation system were compared. Methods Single-rooted extracted teeth (n = 250) were contaminated with suspensions of Enterococcus faecalis ATCC 29212, mixed aerobic cultures, or mixed anaerobic cultures. First, the antibacterial effects of the hydrodynamic system (RinsEndo), a passive ultrasonic irrigation system (Piezo smart), and manual rinsing with 0.9% NaCl (the control) were compared. Colony-forming units were counted. Second, the 2 systems were used with 1.5% sodium hypochlorite (NaOCl) alone or NaOCl + 0.2% chlorhexidine (CHX). The colony-forming units in the treated and untreated roots were determined during a period of 5 days. Results Both irrigation systems reduced bacterial numbers more effectively than manual rinsing (P <.001). With NaCl, ultrasonic activated irrigation reduced bacterial counts significantly better than hydrodynamic irrigation (P =.042). The NaOCl + CHX combination was more effective than NaOCl alone for both systems (P <.001), but hydrodynamic irrigation was more effective with NaOCl + CHX than the passive ultrasonic irrigation system. Conclusions Both irrigation systems, when combined with NaOCl + CHX, removed bacteria from root canals.
机译:简介为确保根管治疗成功,应有效减少牙髓病菌群。比较了水动力系统和被动式超声波灌溉系统的体外杀菌效果。方法单根拔牙(n = 250)被粪肠球菌ATCC 29212悬浮液,混合有氧培养物或混合厌氧培养物污染。首先,比较了水力系统(RinsEndo),被动式超声波灌溉系统(Piezo smart)和用0.9%NaCl手动冲洗(对照)的抗菌效果。计算菌落形成单位。其次,两个系统分别使用1.5%的次氯酸钠(NaOCl)或NaOCl + 0.2%的洗必太(CHX)。在5天的时间内确定处理过的和未处理过的根中的菌落形成单位。结果两种灌溉系统均比人工冲洗更有效地减少了细菌数量(P <.001)。使用氯化钠,超声波激活的灌溉减少细菌的数量明显好于流体动力灌溉(P = .042)。对于这两个系统,NaOCl + CHX组合比单独使用NaOCl更为有效(P <.001),但是与被动式超声波灌溉系统相比,使用NaOCl + CHX进行水力灌溉更为有效。结论两种灌溉系统结合NaOCl + CHX可以去除根管中的细菌。

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