To mimic physiological conditions, a simulated body fluid (SBF) was prepared according to the protocol of Kokubo et al. . The solution was made by dissolving reagents such as NaCl, NaHCO3, KCl, K2HPO4•3H2O, MgCl2•6H2O, 1M-HCl, CaCl2, Na2SO4, and (CH2OH)3CNH2 in ion-exchanged and distilled water at 36.5 °C and adjusting the pH to 7.4 with 1N-HCl solution. The SBF was stored at 5 °C until use and was replaced with fresh solution once a week. Copolymer films with a thickness of 0.5 mm and dimensions of 15x15 mm were immersed in the SBF and kept in dynamic conditions using an orbital shaker at 37 °C for 4 weeks. The samples were then collected, rinsed with distilled water and dried in a vacuum oven for 24 hours. The surfaces of the samples were analysed using a UHR FE-SEM Hitachi SU8020, equipped with energy dispersive X-ray spectroscopy (EDX). An ultra-thin coating of chromium (Cr) with a thickness of 20 nm was applied to the samples using Quorum Q150T sputtering to provide electrical conductivity for t he SEM.