Coating of manganese functional polyetheretherketone implants for osseous interface integration

Area of Science:

• Biomaterials Science
• Orthopedic Engineering
• Tissue Engineering

Background:

• Polyetheretherketone (PEEK) is widely used in biomedical applications.
• Enhancing PEEK's osteogenic properties is crucial for bone regeneration.
• Surface modification can improve PEEK's biological performance.

Purpose of the Study:

• To fabricate manganese-modified PEEK implants (PEEK-PDA-Mn).
• To evaluate the cytocompatibility and osteogenic potential of PEEK-PDA-Mn.
• To assess the bone regeneration capacity of PEEK-PDA-Mn in vivo.

Main Methods:

• Fabrication of PEEK-PDA-Mn via polydopamine treatment.
• Surface characterization of modified PEEK (roughness, hydrophilicity).
• In vitro cell culture studies (adhesion, spreading, gene expression, mineralization).
• In vivo study using a rat femoral condyle defect model.

Main Results:

• Successful immobilization of manganese on PEEK surface.
• Improved surface roughness and hydrophilicity of PEEK-PDA-Mn.
• Enhanced cell adhesion and spreading on PEEK-PDA-Mn.
• Increased expression of osteogenic genes, alkaline phosphatase (ALP), and mineralization in vitro.
• Promoted bone tissue regeneration in the defect area in vivo.

Conclusions:

• Surface modification of PEEK with manganese via polydopamine is effective.
• PEEK-PDA-Mn exhibits superior biocompatibility and osteogenic properties.
• The modified PEEK demonstrates enhanced bone regeneration capabilities.
• PEEK-PDA-Mn holds potential for clinical orthopedic implant applications.