Combined Sodium Hypochlorite and 940 nm Diode Laser Treatment Against Mature E. Faecalis Biofilms in-vitro
نویسندگان
1 Unit of Dental Pathology and Therapeutics II, School of Medicine and Dentistry, University of Santiago de Compostela.
2 Unit of Dental Pathology and Therapeutics II, School of Medicine and Dentistry, University of Santiago de Compostela, Rúa EntrerrÃos s/n 15782, Santiago de Compostela, Spain. Telephone: +34981563100, Extension.12352, Fax: 981562226.
3 Unit of Microbiology, School of Medicine and Dentistry, University of Santiago de Compostela, Rúa de San Francisco s/n 15782, Santiago de Compostela, Spain
4 Unit of Dental Pathology and Therapeutics II, School of Medicine and Dentistry, University of Santiago de Compostela, Rúa EntrerrÃos s/n 15782, Santiago de Compostela, Spain. Telephone: +34981563100, Extension.12352, Fax: 981562226.
5 Unit of Dental Pathology and Therapeutics II, School of Medicine and Dentistry, University of Santiago de Compostela, Rúa EntrerrÃos s/n 15782, Santiago de Compostela, Spain. Telephone: +34981563100, Extension.12352, Fax: 981562226.
6 Unit of Dental Pathology and Therapeutics II, School of Medicine and Dentistry, University of Santiago de Compostela, Rúa EntrerrÃos s/n 15782, Santiago de Compostela, Spain. Telephone: +34981563100, Extension.12352, Fax: 981562226.
7 Unit of Dental Pathology and Therapeutics II, School of Medicine and Dentistry, University of Santiago de Compostela, Rúa EntrerrÃos s/n 15782, Santiago de Compostela, Spain. Telephone: +34981563100, Extension.12352, Fax: 981562226.
8 Unit of Microbiology, School of Medicine and Dentistry, University of Santiago de Compostela, Rúa de San Francisco s/n 15782, Santiago de Compostela, Spain. Telephone: +34981563100.
9 Department of Clinic Epidemiology. University of Santiago de Compostela. Complejo Hospitalario Universitario De Santiago de Compostela, Choupana, s/n 15706 Santiago De Compostela, Spain. Telephone: +34981563100.
10 Department of Operative Dentistry and Endodontology, School of Dentistry, Ghent University, Ghent University Hospital,De Pintelaan 185/P8, B-9000 Gent, Belgium
doi
3074چکیده
INTRODUCTION: Laser irradiation has been introduced in endodontic treatment due to its bactericidal effect. The aim of this study is to evaluate the bactericidal efficacy of a 940 nm diode laser alone or in combination with 5% sodium hypochlorite (NaOCl) against mature biofilms of E. Faecalis.METHODS: Sixty-eight (60 for the three groups, 4 for SEM and 4 as negative controls) single-rooted human central incisors were prepared and contaminated with E. Faecalis. After two weeks of incubation, specimens were randomly divided in three groups; group 1 (n =20), the teeth were irradiated with a 940 nm diode laser; group 2 (n=20), specimens were rinsed with 5% NaOCl; group 3 (n=20), the teeth were rinsed with 5% NaOCl and then were irradiated with 940 nm diode laser. Four teeth were used to observe the biofilms by SEM. Intracanal bacteria sampling was done, and the samples were plated to determinate the CFU count.RESULTS: At 24 hours and 7 days, group 3 showed a significant difference (P=0,02; P=0,00) in disinfection if compared to group 1 but did not show this difference if compared to group 2 (P=1, P=0,66), although group 3 obtaining a more extensive disinfection. Groups 1 and 2 did not show difference after 24 hours (P=0,09) but showed a significant difference 7 days afterwards (P=0,04).CONCLUSION: The combination of sodium hypochlorite and diode laser light (940 nm) has a synergistic effect, intensifying the bactericidal action.
