Comparative evaluation of apical extrusion of intracanal bacteria using ProTaper Next, Mtwo, and ProTaper rotary systems: An in vitro study.

Autor:	Polineni S; Department of Dentistry, All India Institute of Medical Sciences, Mangalagiri, Andhra Pradesh, India., Damaraju B; Department of Conservative Dentistry and Endodontics, Anil Neerukonda Institute of Dental Sciences, Vishakhapatnam, India., Bolla N; Department of Conservative Dentistry and Endodontics, Sibar Institute of Dental Sciences, Guntur, Andhra Pradesh, India., Sunil C; Department of Conservative Dentistry and Endodontics, Sibar Institute of Dental Sciences, Guntur, Andhra Pradesh, India., Krishna NV; Department of Conservative Dentistry and Endodontics, CKS Theja Institute of Dental Sciences, Tirupati, India., Sreeha K; Department of Conservative Dentistry and Endodontics, Konaseema Institute of Dental Sciences, Amalapuram, Andhra Pradesh, India.
Jazyk:	angličtina
Zdroj:	Journal of conservative dentistry : JCD [J Conserv Dent] 2020 May-Jun; Vol. 23 (3), pp. 314-318. Date of Electronic Publication: 2020 Dec 04.
DOI:	10.4103/JCD.JCD_283_19
Abstrakt:	Aim: The aim of this study was to evaluate the number of intracanal bacteria extruded apically after instrumentation with three different nickel-titanium rotary instruments. Materials and Methodology: Forty freshly extracted mandibular premolars were selected, access cavities were prepared, and the teeth were mounted in the bacterial collection apparatus. Root canals were contaminated with a suspension of Enterococcus faecalis and incubated for 24 h at 37°C. The contaminated teeth were divided into four groups of 10 teeth each according to the rotary system used for instrumentation: Group 1: ProTaper universal files, Group 2: MTwo files, Group 3: ProTaper Next files, and Group 4: Control group (no instrumentation). Bacteria extruded after preparations were collected into vials. The number of colony-forming units (CFUs) was determined for each sample. Statistical Analysis: The data obtained were analyzed using the one-way analysis of variance followed by post hoc Tukey's test with a P = 0.05 as the level for statistical significance. Results: The results suggested a statistically significant difference in the number of CFUs between four experimental groups (P < 0.001). Conclusion: Least amount of bacterial extrusion was seen in ProTaper Next Group while more bacterial extrusion was seen in MTwo Group. Competing Interests: There are no conflicts of interest. (Copyright: © 2020 Journal of Conservative Dentistry.)
Databáze:	MEDLINE
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