Abstract
For centuries, piercing was an expression of art around the world and constituted a significant part of the culture and rituals of many different civilizations. This study evaluated the microstructure and the corrosion resistance in artificial saliva of two newly implantable devices used in tongue piercing. We investigated materials microstructure by optical microscopy and scanning electron microscopy (SEM), followed by an energy-dispersive X-ray spectroscopy (EDX) analysis in order to determine elemental composition. The corrosion resistance was determined by linear polarization technique. The corrosion tests were performed in artificial saliva Fusayama Meyer (composition: 0.4 gl-1NaCl, 0.9 gl-1 KCl, 1 gl-1 urea, 0.69 gl-1 NaH2PO4, 0.795 gl-1 CaCl * 2H2O) with a pH = 5.2 at temperature of 37 ± 0.5°C. The materials used for these types of implants were identified as Ti-6Al-4V alloy (sample 1) and austenitic stainless steel (sample 2). From corrosion resistance evaluation point of view, sample 1 showed the most electropositive value and hence better corrosion behavior compared to sample 2, having the Ecor potential -398.24 mV but this is clearly according the chemical composition of these two metallic biomaterials.
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