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Updated: May 29, 2026
07:14
Synthesis of Graphene-Hydroxyapatite Nanocomposites for Potential Use in Bone Tissue Engineering
Published on: July 27, 2022
Manganese-doped nano-hydroxyapatite enhances CF/PEEK osseointegration via immunomodulation-osteogenesis coupling
Jiajun Liu1,2, Zhenghao Li1,2, Xuening Chen1,2
1National Engineering Research Center for Biomaterials, Sichuan University, Chengdu 610064, China.
Regenerative Biomaterials
|May 28, 2026
Summary
A novel manganese-doped nano-hydroxyapatite (Mn/nHA) coating on carbon fiber-reinforced polyetheretherketone (CF/PEEK) implants enhances bone repair. This coating promotes M2 macrophage polarization and osteogenic differentiation, reducing fibrosis and improving osseointegration for bone defect treatment.
Area of Science:
- Biomaterials Science
- Tissue Engineering
- Immunomodulation
Background:
- Carbon fiber-reinforced polyetheretherketone (CF/PEEK) is promising for bone defect repair due to its mechanical properties and radiolucency.
- The bioinertness of CF/PEEK can lead to interfacial fibrosis and implant failure.
- Enhancing CF/PEEK bioactivity is crucial for successful bone regeneration.
Purpose of the Study:
- To develop a manganese-doped nano-hydroxyapatite (Mn/nHA) coating on CF/PEEK implants.
- To investigate the synergistic effects of Mn/nHA coating on immunomodulation and osteogenesis.
- To evaluate the efficacy of Mn/nHA coated CF/PEEK in repairing bone defects.
Main Methods:
- Liquid-phase nanoparticle self-assembly was used to deposit Mn/nHA coating *in situ* on CF/PEEK.
- *In vitro* co-culture experiments assessed macrophage polarization and bone marrow stromal cell (BMSC) behavior.
- *In vivo* femoral condyle defect models were used to evaluate bone regeneration and osseointegration.
Main Results:
- The Mn/nHA coating induced M2 anti-inflammatory macrophage polarization and reduced pro-inflammatory factors.
- The coating promoted BMSC proliferation and osteogenic differentiation.
- *In vivo* studies showed reduced interfacial fibrosis, accelerated bone regeneration, and enhanced osseointegration.
Conclusions:
- Mn/nHA coating on CF/PEEK synergistically enhances immunomodulatory and osteogenic capacities.
- This functional coating effectively addresses interfacial compatibility challenges in CF/PEEK implants.
- The study offers a novel strategy for designing improved biomaterials for bone defect repair.
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