不同根管动能冲洗方式冲洗效果的研究OACSTPCD

Objective To compare the effect of ultrasonic activated irrigation,EDDY irrigation and Er∶YAG laser shock-wave enhanced emission photo acoustic streaming(SWEEPS)on the removal of Enterococcus faecalis in root ca-nals.Methods This study was carried out in the Department of Endodontics and the Laboratory of Oral Microecology and Systemic Diseases,the Ninth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine from February to June 2023.Fifteen root canal models of mandibular first premolars infected with Enterococcus faecalis were constructed and divided into ultrasound group,EDDY group,and SWEEPS-Er∶YAG group,with five models in each group.The root canals of three groups of tooth models were irrigated with the corresponding irrigation methods mentioned above,each tooth model was rinsed 3 times,and the samples of main root canals and lateral root canals were collected with sterile paper before and after each rinse,and the samples were detected and analyzed by plate bacterial count meth-od.Results SWEEPS-Er∶YAG group had significantly fewer colonies in the main root canal at 30 s and 60 s after irrigation and in the lateral root canal at 60 s and 90 s af-ter irrigation than ultrasonic group and EDDY group(all P＜0.05).The reduction rate of bacterial load in the main root canal at 30 s and 60 s afterirrigation and in the lateral root canal at 30 s,60 s and 90 s after irrigation in SWEEPS-Er:YAG group was significantly higher than that in ultrasonic group and EDDY group(all P＜0.05).Conclusion Er∶YAG laser SWEEPS mode can remove Entero-coccus faecalis in root canals faster and better than passive ultrasonic activated irrigation and EDDY irrigation.