ANALYSIS OF PROCESS PARAMETERS ON SURFACE ALTERATION OF TI6AL4V DENTAL IMPLANTS VIA HA-MIXED-EDCLT

Titanium is a highly operational alloy for use in dental implants. Surface inertness of the titanium alloy surfaces reduces osseointegrate, raising concerns about implant loosening. Hydroxyapatite (HA)-rich porous titanium surfaces with moderated surface roughness have better osteoconductivity. This study focused on the surface alteration of Ti6Al4V via hydroxyapatite mixed electric discharge-assisted centerless turning (HA-mixed-EDCLT) to find the optimum surface. The experiments were planned based on a four-factor, three-level Box-Behnken design. HA-powder concentration (Cp), revolutions per minute (RPM), duty factor and impulse current (IP) were the input parameters. The Ra value of machined surfaces ranged from 1.12[Formula: see text][Formula: see text]m to 1.63[Formula: see text][Formula: see text]m, which is in the bone growth supportive implants range. The average hardness reached 415.8–962.7[Formula: see text]HV, where untreated surfaces’ hardness was [Formula: see text][Formula: see text]HV. Porous, hydrophilic coating with a high Ca, P, and O content deposited on the implant surfaces supports the biocompatibility of implants. Analysis of the elements and compounds shows that the machined surface layer is rich with Ca 3 (PO[Formula: see text] and TiO[Formula: see text]which improves the bioactivity of the alloy.