Comparative analysis of SAF, Protaper Next and BT-Race in eliminating Enterococcus faecalis from long oval canals: An ex vivo study.
Comparison of the ability of newly designed rotary files to eliminate viable Enterococcus faecalis populations from long oval root canals of extracted human teeth to that of the self-adjusting file (SAF). One hundred caries-free, single-rooted, long oval teeth were contaminated with E. faecalis. The teeth were randomly distributed into four groups (n = 25) as follows: G.1, manual; G.2, SAF; G.3, ProTaper Next; and G.4, BT-Race. Two microbial samples were obtained from each tooth with sterile paper points, (s1) before and (s2) after instrumentation. The relative reduction in colony-forming units (CFUs) from s1 to s2 measurements was calculated and compared among the groups using parametric Kruskal-Wallis one-way anova on ranks and Dunn's method (a = 0.05). The results indicated a descending order of the groups with regard to efficacy as follows: BT-Race, Next, SAF and manual. The statistical analysis showed that the relative percentage reduction (RR) of CFUs was lower in the manual group than in the other groups, while the SAF group showed a significantly lower RR than the BT-Race group (P < 0.05). The efficacy in reduction of the microbiological load of viable E. faecalis from long oval root canals was different between the tested endodontic systems.
Department of Endodontics, School of Dentistry, National and Kapodistrian University of Athens, Athens, Greece.
Andreas
A
Krokidis
Laboratory of Microbiology, School of Medicine, University of Brescia, Brescia, Italy.
Carlo
C
Bonfanti
Department of Restorative Dentistry, School of Dentistry, University of Brescia, Brescia, Italy.
Antonio
A
Cerutti
Department of Restorative Dentistry, School of Dentistry, University of Brescia, Brescia, Italy.
Nicola
N
Barabanti
Department of Biomaterials, School of Dentistry, National and Kapodistrian University of Athens, Athens, Greece.
Spyros
S
Zinelis
Department of Endodontics, School of Dentistry, National and Kapodistrian University of Athens, Athens, Greece.
Panos
P
Panopoulos
D058491:Bacterial Load; D003762:Dental Instruments; D003786:Dental Pulp Cavity / Q000382:microbiology*; D013293:Enterococcus faecalis / Q000302:isolation & purification*; D006801:Humans; D066298:In Vitro Techniques; D011897:Random Allocation; D018915:Root Canal Preparation / Q000295:instrumentation*

SAF
; BT-Race; ProTaper Next; long oval canals; microbiology