Investigation into Effect of Natural Shellac on the Bonding Strength of Magnesium Substituted Hydroxyapatite Coatings Developed on Ti6Al4V Substrates

The bioactive and biocompatible properties of hydroxyapatite (HA) promote the osseointegration process. To enhance other bio-functions HA such as improving antibacterial property implant, increasing rate cell proliferation, or tissue generation capability, is substituted with many elements Zn, Cl, Ba, Fe, Cu, Ag, Sr, F, Na, etc. This study reports development Magnesium (Mg-HA) coatings on Ti6Al4V substrates using dip coating technique. improve adhesion stability coating, an intermediate layer shellac was applied between substrate. process parameters were optimized Taguchi technique it found that dipping time 35 s 13% w/w concentration provided maximum bonding strength 12.5 MPa. biocompatibility, dissolution, corrosion developed optimal obtained carried out in this study. An improvement growth proliferation observed extract medium prepared from coated substrates. Release Ca, P Mg ions surface substrate into simulated body fluid (SBF) to be almost constant which shows thin film formed. Mg-HA also exhibited better resistance than uncoated