Effect of Zn-nanoHA concentration on the mechanical performance and bioactivity of 3D printed PEEK composites for craniofacial implants

This study aims to investigate the mechanical performance and bioactive potential of polyetheretherketone (PEEK)-based composites. PEEK powder is mixed with up 20 wt-% zinc doped nano-hydroxyapatite (ZnHA) extrude filaments. Subsequently, 3D-printed samples are prepared via fused deposition modelling (FDM). Micro-Computed Tomography (µ-CT) analysis shows distribution ZnHA particles in extruded Fourier transform infrared spectroscopy (FTIR) confirms functional groups samples. The tensile testing results showed that at higher concentration ZnHA, strength strain failure decrease, while elastic modulus increases within acceptable range human cortical bone. Bioactivity tests simulated body fluid (SBF) for 14 days illustrate formation apatite precipitates on composite samples’ surface compared pure PEEK. Based results, it can be concluded FDM 3D-printing PEEK/ZnHA composites used effectively manufacturing customised craniofacial/orthopedic implants.