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Dual effects and mechanism of TiO2 nanotube arrays in reducing bacterial colonization and enhancing C3H10T1/2 cell adhesion

Authors Peng Z, Ni J, Zheng K, Shen Y, Wang X, He G, Jin S, Tang T

Received 12 May 2013

Accepted for publication 30 June 2013

Published 14 August 2013 Volume 2013:8(1) Pages 3093—3105

DOI https://doi.org/10.2147/IJN.S48084

Checked for plagiarism Yes

Review by Single-blind

Peer reviewer comments 5

Zhaoxiang Peng,1,2,* Jiahua Ni,3,* Kang Zheng,2 Yandong Shen,2 Xiaoqing Wang,1 Guo He,3 Sungho Jin,4 Tingting Tang1

1Shanghai Key Laboratory of Orthopaedic Implants, Department of Orthopaedic Surgery, Shanghai Ninth People's Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, People's Republic of China; 2Department of Orthopaedic Surgery, Ningbo Medical Treatment Center Lihuili Hospital, Ningbo, People's Republic of China; 3State Key Lab of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai, People's Republic of China; 4Materials Science and Engineering, University of California, San Diego, La Jolla, CA, USA

*These authors contributed equally to this work

Abstract: Competition occurs between the osteoblasts in regional microenvironments and pathogens introduced during surgery, on the surface of bone implants, such as joint prostheses. The aim of this study was to modulate bacterial and osteoblast adhesion on implant surfaces by using a nanotube array. Titanium oxide (TiO2) nanotube arrays, 30 nm or 80 nm in diameter, were prepared by a two-step anodization on titanium substrates. Mechanically polished and acid-etched titanium samples were also prepared to serve as control groups. The standard strains of Staphylococcus epidermidis (S. epidermidis, American Type Culture Collection [ATCC]35984) and mouse C3H10T1/2 cell lines with osteogenic potential were used to evaluate the different responses to the nanotube arrays, in bacteria and eukaryotic cells. We found that the initial adhesion and colonization of S. epidermidis on the surface of the TiO2 nanotube arrays were significantly reduced and that the adhesion of C3H10T1/2 cells on the surface of the TiO2 nanotube arrays was significantly enhanced when compared with the control samples. Based on a surface analysis of all four groups, we observed increased surface roughness, decreased water contact angles, and an enhanced concentration of oxygen and fluorine atoms on the TiO2 nanotube surface. We conclude that the TiO2 nanotube surface can reduce bacterial colonization and enhance C3H10T1/2 cell adhesion; multiple physical and chemical properties of the TiO2 nanotube surface may contribute to these dual effects.

Keywords: bacterial adhesion, titanium implant, surface modification

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