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The evaluation of E. faecalis colonies dissolution ability of sodium hypochlorite in microenvironment by a novel device.

Sun, Xiaoqiang; Li, Shaorong; Wang, Shujing; Luo, Chunxiong; Hou, Benxiang.
Biomed Microdevices; 20(2): 36, 2018 04 12.
Artigo em Inglês | MEDLINE | ID: mdl-29651562
Enterococcus faecalis(E. faecalis) is a common microorganism could be isolated from the infected canals, especially in the case of refractory apical periodontitis. Due to its ability to invade the dentinal tubules and highly resistant to antimicrobial strategies, the thorough debridement of E.faecalis is hard to achieve. And that may be one of the reasons to cause reinfection and therapeutic failure. According to the anatomy of dentinal tubules published before and the results of our team previous work, we designed six types of microtubes with different sizes. By using the method of centrifugation and incubation, a standard infected model mimicking dentinal tubules was established. Sodium hypochlorite (NaClO) is the most popular irrigant applied in root canal treatment. We used three different concentrations with four distinct irrigation duration to observe the antibacterial process of E. faecalis colonies within microtubes dynamically. We concluded that the role of NaClO in the microtubes is concentration dependent and duration dependent. And the interpretation of the results has a certain reference value for clinicians.