• V.Agnes Brigitta
• C.Thangavelu
• S.Rajendran

ABSTRACT Orthodontic wires of Ni-Cr and Ni-Ti alloys and its corrosion resistance in the absence and presence of Ciprofloxacin Hydrochloride tablet 500mg in artificial saliva has been evaluated by electrochemical study such as AC impedance spectroscopy. This electrochemical study has been used to investigate the corrosion behaviour of these alloys. The analysis of the protective film formed on the metal surface was done using AC impedance spectra. In presence of Ciprofloxacin Hydrochloride tablet in Artificial saliva, the corrosion resistance of Ni-Ti alloy is increases and Ni-Cr alloy is decreases. This is Evidenced by increases of Charge transfer resistance (Rct),decreases of double layer capacitance (Cdl) in Ni-Ti alloy and decreases of Charge transfer resistance (Rct),increases of double layer capacitance (Cdl) in Ni-Cr alloy. The high corrosion resistance of Ni-Ti alloy is due to the formation of a protective film on the metal surface. This protective film confirmed that the active principles of the tablet ingredients have co-ordinated with the Ni-Ti metal ions through their polar atoms to form a complex. The low corrosion resistance of Ni-Cr alloy is due to the absence of the protective film on the metal surface. Hence these electro chemical studies conclude that people clipped with orthodontic wire made of Ni-Ti alloy can take Ciprofloxacin Hydrochloride (500mg) tablet orally without any hesitation. But in the case of Ni-Cr alloy, People should avoid taking Ciprofloxacin Hydrochloride tablet orally while they are clipping the orthodontic wire made of Ni-Cr alloy.

: Corrosion resistance, AC impedance spectra, orthodontic wire, Ciprofloxacin Hydrochloride, Ni-Cr and Ni-Ti alloys.

"Orthodontic wires of Ni-Cr and Ni-Ti alloys and its corrosion resistance in the absence and presence of Ciprofloxacin Hydrochloride tablet 500mg in artificial saliva ", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.5, Issue 9, page no.214-220, September-2018, Available :http://www.jetir.org/papers/JETIR1809436.pdf

"Orthodontic wires of Ni-Cr and Ni-Ti alloys and its corrosion resistance in the absence and presence of Ciprofloxacin Hydrochloride tablet 500mg in artificial saliva ", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.5, Issue 9, page no. pp214-220, September-2018, Available at : http://www.jetir.org/papers/JETIR1809436.pdf