CAN PEOPLE IMPLANTED WITH 18CT GOLD ALLOY USE DANT KANTI TOOTHPASTE?

Corrosion resistance of 18ct gold has been evaluated in artificial saliva in the absence and presence of five toothpastes namely Vicco, Dant Kanti, Sparkle Fresh, Emoform and Colgate Visible White by electrochemical studies. It’s observed that 18ct gold+ AS+ toothpaste system is more corrosion resistant. In polarization study when corrosion resistance increases, linear polarization resistance (LPR) increases and corrosion current (Icorr) decreases. In AC impedance spectra, when corrosion resistance increases, charge transfer resistance (Rct) increases ; double layer capacitance (Cdl) decreases; the impedance increases. Among the five toothpastes studied the Dant Kanti offers better corrosion resistance to 18ct gold. For this system, LPR= 2528937ohm cm2; Icorr = 1.338x10-8 A/cm2; Rct =10870 ohm cm2; Cdl= 4.6918x10-10 F/cm2and impedance =4.415 logz/ohm. The high corrosion resistance offered by the Dant Kanti toothpaste is due to formation of a compact, stable, protective film on the surface of 18ct gold. The surface morphology of the protective film has been analysed with the help of UV-Visible absorption spectra, fluorescence spectra, FTIR, SEM and EDX. They confirm the presence of protective film formed on the metal surface. The active principles of the ingredients of the toothpaste have co-ordinated with the gold ions on the metal surface through their polar atoms. EDX spectra reveal that there is increase in the intensity of the peaks in the presence of toothpaste solution.