Related Experiment Video
Updated: Sep 8, 2025
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Multi-Scale Modification of Metallic Implants With Pore Gradients, Polyelectrolytes and Their Indirect Monitoring In vivo
Published on: July 1, 2013
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Microporous SPEEK Implants Decorated with Bioactive PG/CS/HA Hydrogels for Improving Osseointegration Potential
Ning Guan1, Qin Chen1, Xinyue Zhang1
1School of Materials and Physics, China University of Mining and Technology, Xuzhou 221116, China.
Langmuir : the ACS Journal of Surfaces and Colloids
|July 4, 2025
Summary
Dual modification enhances Polyether ether ketone (PEEK) for orthopedic implants. Surface sulfonation and bioactive hydrogel loading improve PEEK
Area of Science:
- Biomaterials Science
- Orthopedic Engineering
- Surface Chemistry
Background:
- Polyether ether ketone (PEEK) is a common orthopedic material with excellent mechanical properties but lacks bioactivity and osseointegration.
- Poor osseointegration limits the long-term clinical success of PEEK-based orthopedic implants.
- Developing bioactive PEEK surfaces is crucial for enhancing bone integration and implant performance.
Purpose of the Study:
- To improve the bioactivity and osseointegration of PEEK materials for orthopedic applications.
- To create a dual-modified PEEK surface combining sulfonation and a bioactive hydrogel.
- To evaluate the osteogenic potential and bone-bonding capabilities of the modified PEEK.
Main Methods:
- PEEK surface was modified using a microstimulated sulfonation process to create a porous structure.
- A composite hydrogel of phosphorylated gelatin/chitosan/hydroxyapatite (PG/CS/HA) was loaded onto the sulfonated PEEK (SPEEK) surface using polydopamine (PDA).
- Characterization of surface properties, cell proliferation (MC3T3-E1), mineralization (alizarin red staining), and osteogenic gene expression (ALP, OPN, RUNX2) were performed.
Main Results:
- The dual modification significantly enhanced PEEK's hydrophilicity, biocompatibility, and mineralization ability.
- Cell proliferation increased by 32% and alizarin red staining rate improved by 111% after 14 days.
- Osteogenic gene expression (ALP, OPN, RUNX2) showed significant increases of 132%, 151%, and 131%, respectively.
- The modified material demonstrated excellent in vitro osteogenic induction potential and improved osseointegration.
Conclusions:
- Dual modification of PEEK with surface sulfonation and PG/CS/HA hydrogel effectively overcomes its bioinertness.
- The SPEEK-PG/CS/HA material presents a promising strategy for enhancing orthopedic implant osseointegration.
- This approach offers a novel pathway for developing advanced bioactive orthopedic materials.
