Effects of ozone and photo-activated disinfection against Enterococcus faecalis biofilms in vitro

• Published in: Nigerian journal of clinical practice Vol. 18; no. 6; pp. 814 - 818
• Main Authors: Tuncay, Ö, Dinçer, A N, Kuştarcı, A, Er, Ö, Dinç, G, Demirbuga, S
• Format: Journal Article
• Language: English
• Published: India Medknow Publications and Media Pvt. Ltd 01.11.2015
• Subjects: Biofilms - drug effects; Care and treatment; Comparative analysis; Dental Pulp Cavity - microbiology; Disinfection; Disinfection - methods; Enterococcal infections; Enterococcus faecalis - isolation & purification; Humans; Methods; Ozone; Ozone - pharmacology; Phototherapy; Root Canal Irrigants - therapeutic use; Root Canal Preparation - methods; Sodium Hypochlorite - pharmacology
• DOI: 10.4103/1119-3077.163289
• ISSN: 1119-3077

The purpose of this study was to compare the antibacterial effects of gaseous ozone (O3) and photo-activated disinfection (PAD) methods against Enterococcus faecalis (E. faecalis) biofilms. Sixty-five human mandibular premolars with straight root canals were selected. After root canal preparation, the samples were sterilized and placed into eppendorf tubes with 1 mL brain heart infusion broth containing 1.5×10(8) colony-forming units (CFUs)/mL of E. faecalis. The contaminated samples were then divided into four groups (n=15) according to the disinfection method used: Group 1, Saline (positive control); Group 2, NaOCl (negative control); Group 3, Gaseous O3; and Group 4, PAD. Three non-contaminated teeth were used to control the infection and sterilization process. The CFUs were counted and the data were analyzed statistically. There was a statistically significant difference between the experimental and control groups (P<0.05). The saline group had the highest number of remaining microorganisms. Complete sterilization was achieved in the 2.5% NaOCl group. There were no statistically differences between PAD and gaseous O3 (P>0.05). Both PAD and gaseous O3 have a significant antibacterial effect on infected root canals. However, 2.5% NaOCl was superior in terms of its antimicrobial abilities compared with the other disinfection procedures.