Comparison of the antimicrobial effects of Nd:YAG laser,Er:YAG laser and ultrasonic irrigation on infected root canals
HUANG Xian-bo
YANG Yong-jin
LI Guang
Abstract：AIM:To compare the in vitro and in vivo root canal disinfection effects of Nd:YAG laser (NdL),Er:YAG laser(ErL),ultrasonic irrigation(US)and normal saline(NS)irrigation.METHODS:For the in vitro study,85 single -rooted teeth were selected and contaminated with Enterococcus faecalis.The specimens were randomly divided into 4 groups(n=20)and were then treated with NdL,ErL,US and NS irrigation respectively.Bac-teria were collected from the root canals and cultured.For the in vivo study,280 teeth with chronic apical periodontitis were selected and randomly divided into 4 groups(n=70).After root canal preparation,the root canals were treated with NdL,ErL,US and NS respectively,and were then filled.The patients were followed-up at 1 d,3 d,5 d and 1 year after treatment.RESULTS:In vitro study showed that the root canal disinfection effects of NdL and ErL were sig-nificantly stronger than that of US and NS (P<0.05).No significant difference was found between US and NS(P>0. 05 ).In vivo study showed that NdL,ErL and US decreased the incidence of EIAE after root canal filling at 1 d (P<0.05).At 1 year follow-up,the success rate of NdL and ErL groups were higher than that of US and NS groups (P<0.05).However,no significant difference was found between US and NS groups (P>0.05).CONCLUSION:Nd:YAG laser and Er:YAG laser is effective in root canal disinfection.
Keywords：root canal disinfectionEnterococcus faecalisinfected root canallaserultrasonic
Publication Date：2015-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：4( 322-325 )