Study on the effect of ultrasonic irrigation in deactivating and eliminating the endotoxin in the root canals of chronic periapical periodontitis
LIU Gui-xiang1，2, WANG Qing1, DOU Hui-qin2
West China Journal of Stomatology . 2010, (02): 158 -161 .  DOI: 10.3969/j.issn.1000-1182.2010.02.011

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