Bio-Activated PEEK: Promising Platforms for Improving Osteogenesis through Modulating Macrophage Polarization

Area of Science:

• Biomaterials Science
• Immunology
• Orthopedic Surgery
• Tissue Engineering

Background:

• Orthopedic biomaterial research has shifted focus from direct osteogenesis to osteoimmunomodulation, particularly macrophage polarization.
• Polyetheretherketone (PEEK) is being engineered for enhanced osteoimmunomodulatory capabilities.
• Modulating macrophage polarization is key to improving osseointegration and implant success.

Purpose of the Study:

• To comprehensively review the potential of bio-activated PEEK in improving osteogenesis.
• To evaluate PEEK modifications that promote M2 macrophage polarization.
• To discuss challenges and future directions for bio-activated PEEK in orthopedic applications.

Main Methods:

• Review of recent studies on PEEK surface modification and bioactive substance incorporation.
• Analysis of strategies enhancing M2 macrophage polarization via hydrophilic surfaces and incorporated elements (zinc, calcium, phosphate).
• Discussion of osteoimmunomodulatory composites (lncRNA-MM2P, IL-4, IL-10, chitosan) for PEEK modification.

Main Results:

• Hydrophilic surface fabrication and incorporation of bioactive substances (Zn, Ca, P) promote osteogenesis by enhancing M2 macrophage polarization.
• Bio-activated PEEK, through controlled release of immunomodulatory agents, can balance osteogenic and immune responses.
• Various PEEK modification strategies show potential for improving osteogenesis via macrophage polarization.

Conclusions:

• Bio-activated PEEK holds significant potential as an optimal orthopedic implant material.
• Targeting M2 macrophage polarization is a promising strategy for enhancing osteogenesis with PEEK.
• Further research into PEEK modifications can lead to advanced bio-activated implants with improved osteoimmunomodulation.