Clearup Effects of Nickel-titanium Rotary Instrument and Ultrasonic Irrigation on Endotoxin Level in Root Canals of Chronic Apical Periodontitis

doi:10.13701/j.cnki.kqyxyj.2018.11.009

Abstract

Abstract: Objective: To study the clearup effects of nickel-titanium rotary instrument and ultrasonic irrigation on the endotoxin level in root canals of chronic apical periodontitis. Methods: Thirty maxillary anterior teeth clinically diagnosed with chronic apical periodontitis were randomized into three groups. Group A was prepared with nickel-titanium rotary instrument. Group B was given one minute ultrasonic irrigation with sterile distilled water after root canal preparation with nickel-titanium rotary instrument. Group C was given one minute ultrasonic irrigation with 3% NaClO after root canal preparation with nickel-titanium rotary instrument. The concentration of endotoxin in the root canals was detected before and after treatments. Results: There were no statistical differences between three groups before treatments (P>0.05). The endotoxin concentrations in the three groups were (8.52±2.04) EU/mL, (1.61±0.41) EU/mL, and (0.22±0.11) EU/mL, respectively after treatments (P<0.05). Conclusion: Nickel-titanium rotary instrument and ultrasonic irrigation has a good effect on the clearup effect of endotoxin level in the root canals, and the effect with ultrasonic irrigation for one minute with 3% NaClO was better than ultrasonic irrigation for one minute with sterile distilled water.

Key words: Ultrasonic irrigation, Endotoxin in the root canal, Root canal disinfection, Chronic apical periodontitis

HU Yong-qing, LI Ya, LI Shu-juan, LIANG Xiang-yang, YANG Dong-ru. Clearup Effects of Nickel-titanium Rotary Instrument and Ultrasonic Irrigation on Endotoxin Level in Root Canals of Chronic Apical Periodontitis[J]. Journal of Oral Science Research, 2018, 34(11): 1182-1185.

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