The effect of some fluids on surface oxidation and amount of released iron of stainless steel endodontic files.
Endodontic files come in contact with blood, infected pulp tissue, and irrigating solutions during root canal therapy. Some instruments such as stereomicroscopy and scanning electron microscopy are used to observe corrosion of endodontic files which are complicated and dependent on preparation methods. Having knowledge of the corrosion and ion release of endodontic files can help in drawing firm deductions as to which files would perform better in the clinical scenario. Therefore, we have used energy dispersive X-ray analysis and an atomic absorption spectrophotometer to track oxygen on the surface and iron in the exposed media to observe the oxidative rate of the media. In this study, corrosion by blood was higher than other biological fluids, but less than with sodium hypochlorite (NaOCl). Observations of energy dispersive X-ray analysis and atomic absorption spectrophotometer results demonstrated that after exposure the amount of oxygen on the surface and surrounding areas increased. Therefore, the files should be rinsed as soon as possible during and after use to hinder the oxidation rate, but blood may produce a different behavior and it might be considered as a decreased risk of broken stainless steel files remaining in the root canal after treatment.
Department of Dental Material, Dental Branch, Azad University, Tehran, Iran. Saghiri@gmail.com
Mohammad Ali
MA
Saghiri
Franklin
F
García-Godoy
Mehrdad
M
Lotfi
Peyman
P
Mehrvazfar
Mohsen
M
Aminsobhani
Samad
S
Rezaie
Kamal
K
Asgar
D003343:Corrosion; D004708:Endodontics / Q000379:methods*; D004864:Equipment and Supplies; D007501:Iron / Q000032:analysis; D010084:Oxidation-Reduction; D010100:Oxygen / Q000032:analysis; D013052:Spectrometry, X-Ray Emission; D013054:Spectrophotometry, Atomic; D013193:Stainless Steel
D013193:Stainless Steel; D007501:Iron; D010100:Oxygen