Journal
MATERIALS LETTERS
Volume 305, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.matlet.2021.130774
Keywords
Polyetheretherketone; Osseointegration; Antibacterial activity; Anti-inflammation activity; Biomaterials
Funding
- Sichuan Science and Technology Program [2018JY0233]
- Scientific Research Project of Sichuan Provincial Department of Education [18ZA0197]
- Innovation Young Plant Project of Sichuan Province Science and Technology [2018024]
- Nanchong Science and Technology Project [20SXQT0302, 19SXHZ0246]
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The introduction of sulfonate groups onto PEEK surface enhances antibacterial, anti-inflammatory, and osteogenic activity, as well as adhesion, spreading, and proliferation of osteoblasts. Sulfonate-bearing PEEK shows potential clinical applications as orthopedic and dental implants.
Polyetheretherketone (PEEK) has a similar elastic modulus to that of human bone and is considered a promising alternative for biomedical metallic implants. However, the poor antibacterial, anti-inflammatory, and osteogenic activity of bioinert PEEK impedes its clinical use for orthopedic and dental implants. Furthermore, using a single functional strategy to achieve all three biological functions simultaneously is challenging. Previous studies have demonstrated that sulfonate-bearing surfaces have antibacterial activity as well as decreased secretion of proinflammatory cytokine TNF-alpha. Therefore, in this study, sulfonate groups were introduced onto the PEEK surface by a one-step ultraviolet-initiated graft polymerization method. In vitro studies revealed enhanced adhesion, spreading, proliferation, and osteo-differentiation of MC3T3-E1 osteoblasts. Furthermore, the sulfonate-bearing PEEK had anti-inflammatory properties, and antibacterial activity to Escherichia coli and Staphylococcus aureus. Collectively, our findings indicate that PEEK implants bearing sulfonate groups with ameliorative antibacterial, anti-inflammatory, and osteogenic activity have potential clinical applications as orthopedic and dental implants.
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