Cleaning Effectiveness of Different Irrigation Techniques on Root Canal Walls: an in vitro Study

doi:10.13701/j.cnki.kqyxyj.2021.09.008

Abstract

Abstract: Objective: To compare the effect of four different irrigation techniques on smear layer removal in root canals in vitro. Methods: Sixty mandibular premolars extracted from patients in the Department of Oral and Maxillofacial Surgery of the First Affiliated Hospital of Zhengzhou University were collected. All the crowns of the single-root human teeth were cut off and the root length was trimmed to 15mm. The specimens were instrumented with ProTaper Universal Ni-Ti files. Then they were randomly divided into four groups according to irrigation techniques: needle irrigation (NI), passive ultrasonic irrigation (PUI), EDDY irrigation (EDDY), and PIPS-Er:YAG laser irrigation (PIPS). Finally, the roots were split longitudinally and observed using scanning electron microscopy (SEM) for assessment of smear layer removal. The smear layer score was assessed and the results were statistically analyzed. Results: In the coronal part of the canal, the mean score of smear layer was similar among four groups (P>0.05). In the middle and apical part of the canal, the smear layer score in PUI group, EDDY group, and PIPS group were significantly lower than those in NI group (P<0.05). In the apical part of the canal, the smear layer score in PIPS group was lower than that of other groups (P<0.05). Conclusion: PIPS-Er:YAG laser irrigation technology can effectively remove smear layer of root canals. The cleaning effect of passive ultrasonic irrigation and EDDY irrigation is better than that of Needle irrigation technology.

Key words: passive ultrasonic irrigation, EDDY, PIPS- Er: YAG laser, smear layer

ZHANG Han, WANG Suping, REN Yingchao, KONG Xianghong, WANG Dandan, XIAO Yan. Cleaning Effectiveness of Different Irrigation Techniques on Root Canal Walls: an in vitro Study[J]. Journal of Oral Science Research, 2021, 37(9): 805-809.

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