title: A comparison of three rotary systems and hand instrumentation technique for the elimination of Enterococcus faecalis from the root canal.
abstract: The aim of this study was to compare the in vitro reduction of a bacterial population in a root canal by mechanical instrumentation using three rotary systems and hand instrumentation technique. The root canals contaminated with a suspension of Enterococcus faecalis were instrumented using ProTaper, K3, HeroShaper and K-file hand instrumentation technique. Later the root canals were sampled. After serial dilutions, samples were incubated in culture media for 24 h. Bacterial colonies were counted and the results were given as number of colony-forming units per millilitre. The results showed that all the canal instrumentation systems reduced the number of bacterial cells in the root canals. Statistically, ProTaper instruments were more effective in reducing the number of bacteria than the other rotary files or hand instruments.
authors: Department of Endodontics, Faculty of Dentistry, Hacettepe University, Ankara, Turkey. mgorduysus@yahoo.com
authors: Melahat
authors: M
authors: Gorduysus
authors: Emre
authors: E
authors: Nagas
authors: Ozgur Yildirim
authors: OY
authors: Torun
authors: Omer
authors: O
authors: Gorduysus
mesh_terms: D058491:Bacterial Load; D001431:Bacteriological Techniques; D003786:Dental Pulp Cavity / Q000187:drug effects / Q000382:microbiology* / Q000648:ultrastructure; D003804:Dentin / Q000187:drug effects / Q000382:microbiology / Q000648:ultrastructure; D004492:Edetic Acid / Q000627:therapeutic use; D013293:Enterococcus faecalis / Q000254:growth & development / Q000302:isolation & purification*; D004867:Equipment Design; D006801:Humans; D008422:Materials Testing; D012388:Root Canal Irrigants / Q000627:therapeutic use; D018915:Root Canal Preparation / Q000295:instrumentation* / Q000379:methods; D012399:Rotation; D016369:Smear Layer; D013696:Temperature; D013997:Time Factors
chemical_list: D012388:Root Canal Irrigants; D004492:Edetic Acid