Modified porous microstructure for improving bone compatibility of poly-ether-ether-ketone.

Area of Science:

• Biomaterials Science
• Orthopedic Engineering
• Medical Device Development

Background:

• Poly-ether-ether-ketone (PEEK) is a widely used biomaterial due to its excellent mechanical and chemical properties.
• However, PEEK's inherent hydrophobicity and bio-inertia lead to poor bone compatibility, limiting its clinical applications.
• Enhancing surface roughness is a known strategy to improve the osseointegration of implant materials.

Purpose of the Study:

• To investigate the effect of porosity on the bone compatibility of modified Poly-ether-ether-ketone (PEEK) implants.
• To compare the in vitro and in vivo biological properties of PEEK implants with varying porosities fabricated using Fused Deposition Modeling (FDM).

Main Methods:

• Fabrication of porous PEEK implants with 40%, 50%, 60% porosity, and solid controls using Fused Deposition Modeling (FDM).
• In vitro and in vivo experiments were conducted to assess bone compatibility and biological responses.
• Comparative analysis of biological properties across different porosity levels.

Main Results:

• Modified porous PEEK implants demonstrated significantly improved bone compatibility compared to solid PEEK controls, both in vitro and in vivo.
• The PEEK implant with 40% porosity exhibited the highest bone compatibility among all tested groups.
• Porosity modification effectively enhanced the osseointegration potential of PEEK.

Conclusions:

• Fabricating porous PEEK structures via FDM is an effective strategy to enhance bone compatibility.
• The 40% porosity PEEK implant shows superior performance for bone integration, offering a promising alternative for orthopedic and dental applications.
• Further research into optimizing porosity for specific clinical needs is warranted.