Editorial Type:
Article Category: Research Article
 | 
Online Publication Date: 01 Jun 2011

Effect of Fluoride on the Corrosion Behavior of Ti and Ti6Al4V Dental Implants Coupled With Different Superstructures

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Page Range: 309 – 317
DOI: 10.1563/AAID-JOI-D-09-00084
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Abstract

The effect of fluoride ion concentration on the corrosion behavior of Ti and Ti6Al4V implant alloys, when coupled with either metal/ceramic or all-ceramic superstructure, was examined by different electrochemical methods in artificial saliva solutions. It was concluded that increased fluoride concentration leads to a decrease in the corrosion resistance of all tested couples. The type of the superstructure also showed a significant effect on the corrosion resistance of the couple.

Copyright: 2011 by the American College of Veterinary Internal Medicine
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F igures 1–3.

Figure 1 . (a) Bode plot showing the 4 electrodes in neutral saliva without fluoride at open-circuit potential (OCP). (b) Bode plot showing the 4 electrodes in neutral saliva without fluoride after anodization. Figure 2. (a) Bode plot of the 4 electrodes in 0.1 M NaF at OCP. (b) Bode plot of the 4 electrodes at 0.1 M NaF after anodization. Figure 3. Nyquist plot of the 4 electrodes in 0.1 M NaF after anodization. __________ electrode I; - - - - - - - - electrode II; -.-.-.-.-.-.-.-.- electrode III; …………… electrode IV.


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F igures 4–7.

Figure 4 . Equivalent electrical circuit for study of corrosion resistance of the 4 electrodes. C1 indicates double-layer capacitance; C2, capacitance of the oxide layer; R0, electrolyte resistance; R1, the charge transfer resistance; R2, resistance of oxide layer; Zw, Warburg impedance due to diffusion in the oxide layer. Figure 5. Potential-time curves for the 4 electrodes in neutral saliva without fluoride after anodization. Figure 6. Potential-time curves for the 4 electrodes in 0.1 M NaF after anodization. Figure 7. Nyquist plot showing electrode I in different fluoride concentrations after anodization. __________ electrode I; - - - - - - - - electrode II; -.-.-.-.-.-.-.-.- electrode III; …………… electrode IV.


Contributor Notes

*Corresponding author, e-mail: lamiask@yahoo.com
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