title: Bactericidal activity of erbium, chromium:yttrium-scandium-gallium-garnet laser in root canals.
abstract: The aim of this study was to investigate the effectiveness of the erbium, chromium:yttrium-scandium-gallium-garnet (Er,Cr:YSGG) laser by measuring its bactericidal effect inside root canals experimentally colonized with Enterococcus faecalis. We also determined the optimal conditions for the Er,Cr:YSGG laser to achieve the maximal bactericidal effect. An Er,Cr:YSGG Waterlase laser was used, and its antimicrobial effect was compared with that of sodium hypochlorite (NaOCl) at various concentrations as widely used in clinics. This laser emits photons at a wavelength of 2.78 microm. It is a pulsed laser operating at 20 Hz (20 pulses/s). Significant differences between measurements in the different groups (P < 0.05) were observed, depending on time and power used. The use of NaOCl 5% was the most effective procedure, with NaOCl 0.5% being the least effective; however, laser treatment was as effective as NaOCl 5% when applied at 2 W for 60 s.
authors: Department of Pathology and Experimental Therapeutics, University of Barcelona, Feixa Llarga s/n, Hospitalet, Barcelona, Spain.
authors: Josep
authors: J
authors: Arnabat
authors: Cesar
authors: C
authors: Escribano
authors: Anna
authors: A
authors: Fenosa
authors: Teresa
authors: T
authors: Vinuesa
authors: Cosme
authors: C
authors: Gay-Escoda
authors: Leonardo
authors: L
authors: Berini
authors: Miguel
authors: M
authors: Viñas
mesh_terms: D058491:Bacterial Load / Q000187:drug effects / Q000528:radiation effects; D019551:Dental Disinfectants / Q000627:therapeutic use; D003786:Dental Pulp Cavity / Q000187:drug effects / Q000382:microbiology* / Q000528:radiation effects*; D004203:Disinfection / Q000379:methods; D013293:Enterococcus faecalis / Q000187:drug effects / Q000302:isolation & purification / Q000528:radiation effects; D016908:Gram-Positive Bacterial Infections / Q000188:drug therapy / Q000382:microbiology / Q000532:radiotherapy; D006801:Humans; D066298:In Vitro Techniques; D053844:Lasers, Solid-State / Q000627:therapeutic use*; D028022:Low-Level Light Therapy / Q000379:methods*; D012390:Root Canal Therapy / Q000379:methods*; D012973:Sodium Hypochlorite / Q000627:therapeutic use
chemical_list: D019551:Dental Disinfectants; D012973:Sodium Hypochlorite