Oral Surgery, Oral Medicine, Oral Pathology, Oral Radiology, and Endodontology
EndodontologyStructural effects of sodium hypochlorite solution on RaCe rotary nickel-titanium instruments: an atomic force microscopy study
Section snippets
Materials and Methods
Four new RaCe rotary NiTi files were used in the present study (two 30.06 and two 30.02). One 30.06 and one 30.02 file were immersed in 5.25% NaOCl solution for 5 min. The other two files were used as controls.
All RaCe files were attached to a metal holder using a rapid-setting cyanoacrylate glue. Each sample was placed on the AFM and analyzed on 11 points along a 3-mm section at the tip of the file. The AFM images were recorded using the needle mode operation on an Omicron VT STM AFM (Omicron
Results
Three-dimensional AFM images of the rotary NiTi files are shown in Fig. 2. Topographic irregularities at nanometric scale were observed for all instruments. Mean RMS values for control and NaOCl-treated 30.06 files were 2.06 ± 0.49 nm and 6.99 ± 2.18 nm, respectively, and the difference between them was statistically significant (P < .01). Mean RMS values for control and NaOC-treated 30.02 files were 3.68 ± 0.98 nm and 6.72 ± 1.72 nm, respectively, and the difference between them also was
Discussion
In the present study, the topographic changes occurred on RaCe files immersed in NaOCl solution was evaluated using AFM, and significant deterioration on the surface was detected. It has been reported that topographic irregularities may have a considerable impact on resistance to fracture of endodontic instruments.4, 6, 12
Sodium hyocholorite is used as an endodontic irrigant as it is an effective antimicrobial and has tissue-dissolving capabilities.13 Corrosion and deterioration of NiTi
References (25)
- et al.
An initial investigation of the bending and torsional properties of nitinol root canal files
J Endod
(1988) - et al.
Scanning electron microscope observations of new and used nickel-titanium rotary files
J Endod
(2003) - et al.
SEM observations of nickel-titanium rotary endodontic instruments that fractured during clinical use
J Endod
(2005) - et al.
Cyclic fatigue of different nickel-titanium endodontic rotary instruments
Oral Surg Oral Med Oral Pathol Oral Radiol Endod
(2006) Atomic force microscopy of biomaterials surfaces and interfaces
Surf Sci
(2001)- et al.
Mechanical properties of nickel-titanium endodontic instruments and the effect of sodium hypochlorite treatment
J Endod
(1998) - et al.
Rotary NiTi instrument fracture and its consequences
J Endod
(2006) - et al.
Cutting efficacy of nickel-titanium endodontic instruments and the effect of sodium hypochlorite treatment
J Endod
(1998) - et al.
Fracture of nickel-titanium superelastic alloy in sodium hypochlorite solution
Mater Sci Eng A
(2004) - et al.
Effect of immersion in sodium hypochlorite on torque and fatigue resistance of nickel-titanium instruments
J Endod
(2007)
Effect of prion decontamination protocols on nickel-titanium rotary surfaces
J Endod
The laboratory assessment of enamel erosion: a review
J Dent
Cited by (34)
Effect of Dynamic Immersion in Sodium Hypochlorite and EDTA Solutions on Cyclic Fatigue Resistance of WaveOne and WaveOne Gold Reciprocating Nickel-titanium Files
2018, Journal of EndodonticsCitation Excerpt :Sodium hypochlorite and EDTA solutions are the most frequently used for root canal irrigation in endodontics (6) because of their good organic solvent properties and antimicrobial effect (18) and for chelation and lubrication purposes, respectively (19, 20). In previous studies, it was reported that NaOCl and EDTA solutions caused significant deterioration on the surfaces of NiTi files (13, 21). No studies examining the effect of NaOCl and EDTA solutions on the cyclic fatigue resistance of WO and WOG files have been conducted yet.
Effect of Sterilization and Irrigating Solutions on Nanostructure Alteration of Ni‑Ti Rotary Instruments in Endodontics: An Atomic Force Microscopic Study
2024, Journal of Pharmacy and Bioallied SciencesInfluence of 17% EDTA and Sapindus mukorossi on the Surface Property of Protaper Gold Rotary Endodontic Instruments
2022, Applied Sciences (Switzerland)Cyclic Fatigue Resistance and Surface Roughness of Rotary NiTi Instruments after Simulated Clinical Use in Curved Root Canals – An Atomic Force Microscopy Study
2022, Pesquisa Brasileira em Odontopediatria e Clinica Integrada
Supported by Turkish State Planning Organization (project no. 2001K20590) and Gazi University Research Foundations (BAP 03/2007-13).
- ⁎
These authors contributed equally to this work.