Root canals decontamination by coherent photons initiated photoacustic streaming (PIPS) of irrigants: an ex-vivo study

Plasma Physics by Laser and Applications 2013 Conference

Pedullà, E.^1 ; Genovese, C.^2 ; Scolaro, C.^3 ; Cutroneo, M.^3 ; Tempera, G.^2 ; Rapisarda, E.^1 ; Torrisi, L.^3

Dipartimento di Chirurgia, Universitá di Catania, 628 via Plebiscito, 95100 (CT), Italy^1

Dip.to di Scienze Biomediche, Universitá di Catania, via Androne, 81, 95100 (CT), Italy^2

Dip.to di Fisica e S.d.T., Universitá di Messina, S.F. d'Alcontres 31, Messina, 98166 S. Agata, Italy^3

关键词: Abrasive instruments;    Colony forming units;    Enterococcus faecalis;    Multiple comparison test;    Planktonic bacteria;    Positive control group;    Sodium hypochlorites;    Statistically significant difference;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/508/1/012026/pdf
DOI  :  10.1088/1742-6596/508/1/012026

来源: IOP

【 摘 要 】

The aim of this ex vivo study was to assess the antibacterial effectiveness of coherent photon initiated photoacoustic streaming (PIPS) of irrigants using an Er:YAG laser equipped with a newly designed, stripped and tapered, tip in extracted teeth with infected root canals. One hundred-forty-eight single-rooted extracted teeth were prepared using a rotary abrasive instrument providing a root channel with a suitable size. The samples were sterilized and all teeth except ten (negative control group) were inoculated with Enterococcus faecalis and incubated in a CO2 chamber at 37°C for 15 days in Eppendorff tubes filled with trypticase soy broth medium changed every 2 days. Infected teeth were then randomly divided into 4 test groups (n=32 for each): pulsed erbium:YAG laser at non-ablative settings for 30 seconds with sterile bi-distilled water (Group A) or 5% sodium hypochlorite (NaOCl) (Group B); without laser activated sterile bi-distilled water irrigation for 30 seconds (Group C) or 5% NaOCl irrigation for 30 seconds (Group D); the positive control group received no treatment in infected teeth (n=10). Colony-forming units (CFUs) were counted from bacteriologic samples taken before (S1) and after treatment (S2). Data were analyzed by Kruskal-Wallis and post hoc Dunn's multiple comparison tests. CFU counts were significantly lower in groups B and D than in group C (P0.05). None of the four groups predictably generated negative samples. Under the conditions of this ex vivo study, statistically significant difference wasn't found in planktonic bacteria reduction between the laser and NaOCl or NaOCl alone groups.