Multilevel surface engineering of nanostructured TiO2 on carbon-fiber-reinforced polyetheretherketone

• Published in: Biomaterials Vol. 35; no. 22; pp. 5731 - 5740
• Main Authors: Lu, Tao, Liu, Xuanyong, Qian, Shi, Cao, Huiliang, Qiao, Yuqin, Mei, Yongfeng, Chu, Paul K, Ding, Chuanxian
• Format: Journal Article
• Language: English
• Published: Netherlands 01.07.2014
• Subjects: Advanced Basic Science; Animals; Anti-Bacterial Agents - chemistry; Anti-Bacterial Agents - pharmacology; Biocompatible Materials - chemistry; Carbon - chemistry; Carbon - pharmacology; Cell Adhesion; Cell Differentiation; Cells, Cultured; Dentistry; Ketones - chemistry; Ketones - pharmacology; Male; Mesenchymal Stromal Cells - cytology; Nanostructures - chemistry; Nanostructures - ultrastructure; Osteoblasts - cytology; Polyethylene Glycols - chemistry; Polyethylene Glycols - pharmacology; Rats; Rats, Inbred F344; Surface Properties; Titanium - chemistry; Titanium - pharmacology; Carbon-fiber-reinforced polyetheretherketone; Antibacterial activity; Osteogenic activity; Nanopores; Plasma immersion ion implantation
• ISSN: 0142-9612; 1878-5905
• DOI: 10.1016/j.biomaterials.2014.04.003

Abstract As an implantable material, carbon-fiber-reinforced polyetheretherketone (CFRPEEK) possesses an adjustable elastic modulus similar to that of cortical bone and is a prime candidate to replace metallic surgical implants. However, the bioinertness and poor osteogenic properties of CFRPEEK limit its clinical application as orthopedic implants. In this work, titanium ions are introduced energetically into CFRPEEK by plasma immersion ion implantation (PIII). Scanning electron microscopy (SEM) and X-ray photoelectron spectroscopy (XPS) reveal the formation of nanopores with the side wall and bottom embedded with ∼20 nm TiO2 nanoparticles on the CFRPEEK surface. Nanoindentation measurements confirm the stability and improved elastic resistance of the structured surfaces. In vitro cell adhesion, viability assay, and real-time PCR analyses disclose enhanced adhesion, proliferation, and osteo-differentiation of rat bone mesenchymal stem cells (bMSCs). The multilevel structures on CFRPEEK also exhibit partial antibacterial activity to Staphylococcus aureus and Escherichia coli . Our results indicate that a surface with multifunctional biological properties can be produced by multilevel surface engineering and application of CFRPEEK to orthopedic and dental implants can be broadened and expedited based on this scheme.