Evaluation of surface alterations in different retreatment nickel-titanium files: AFM and SEM study

Microscopy Research and Technique
Baran Can Sağlam, Güliz Görgül

Abstract

The aim of this study was to evaluate the surface changes of nickel titanium (Ni-Ti) rotary retreatment files after three and five uses. Furthermore, the effects of 2% sodium hypochlorite and chloroform solutions and sterilization procedures on the NiTi rotary retreatment surfaces were investigated. ProTaper Retreatment files, R-endo files, and Mtwo retreatment files were used for this study. The palatinal roots of maxillary molar teeth were obturated with gutta percha and Ah26. Retreatment procedures were performed with these retreatment file systems. The surface changes of untreated NiTi rotary files that were used three and five times, immersed in NaOCl and chloroform and subjected to sterilization procedures were investigated with atomic force microscopy (AFM) and scanning electron microscopy (SEM). The RMS values, three dimensional images and SEM images at various magnifications were obtained. RMS values showed that all three NiTi rotary retreatment file systems showed significant deteriorations after three and five uses. Cracks, damages and spiral construction deteriorations were detected in the SEM images after three and five uses. Furthermore, the Mtwo 15 file was broken off after five uses. AFM data indicated that 2% N...Continue Reading

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Citations

Feb 24, 2016·Journal of Endodontics·Taha Özyürek, Ebru Özsezer Demiryürek
Oct 30, 2016·International Endodontic Journal·F FerreiraM Zaccaro Scelza
Dec 13, 2018·Journal of Applied Oral Science : Revista FOB·Ruixue WuWei Zhao
Oct 24, 2018·Microscopy Research and Technique·Gülşah UsluKoray Yılmaz
Aug 14, 2021·Journal of Dental Research, Dental Clinics, Dental Prospects·Olcay ÖzdemirBaran Can Sağlam

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