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Herein, strontium chondroitin sulfate is first attempted to be introduced into the surface of sulfonated PEEK (SPEEK\u2010CS@Sr) based on the Schiff base reaction between PEEK and ethylenediamine (EDA) and the amidation reaction between EDA and chondroitin sulfate (CS). The surface characteristics of SPEEK\u2010CS@Sr implant are systematically investigated, and its biological properties in vitro and in vivo are also evaluated. The results show that the surface of SPEEK\u2010CS@Sr implant exhibits a 3D microporous structure and good hydrophilicity, and can steadily release Sr ions. Importantly, the SPEEK\u2010CS@Sr not only displays excellent biocompatibility, but also can remarkably promote cell adhesion and spread, improve osteogenic activity and angiogenic activity, and reduce the inflammatory response compared to the original PEEK. Therefore, this study presents the surface modification of PEEK material by simple chemical grafting of strontium chondroitin sulfate to improve its angiogenesis, anti\u2010inflammation, and osteogenic properties, and the as\u2010fabricated SPEEK\u2010CS@Sr has the potential to serve as a promising orthopedic implant in bone tissue engineering.<\/jats:p>","DOI":"10.1002\/adhm.202200398","type":"journal-article","created":{"date-parts":[[2022,4,28]],"date-time":"2022-04-28T09:18:38Z","timestamp":1651137518000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":50,"title":["Surface Modification of Poly(ether ether ketone) by Simple Chemical Grafting of Strontium Chondroitin Sulfate to Improve its Anti\u2010Inflammation, Angiogenesis, Osteogenic Properties"],"prefix":"10.1002","volume":"11","author":[{"given":"Zhe","family":"Zheng","sequence":"first","affiliation":[{"name":"Department of Biomedical Engineering Southern University of Science and Technology  Shenzhen Guangdong P. 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