J Mater Sci Technol ›› 2009, Vol. 25 ›› Issue (04): 556-560.

• Articles • Previous Articles     Next Articles

An in vivo Evaluation of Ultra-fine Grained Titanium Implants

S. Bindu1), K.P. Sanosh2), K. Smetana3), A. Balakrishnan2), T.N. Kim 2)†   

  1. 1) Department of Life Science and Genetic Engineering, Paichai University, Daejeon, 302-735, Korea
    2) Department of Information and Electronic Materials Engineering, Paichai University, Daejeon, 302-735, Korea
    3) Charles University, 1st and 2nd Faculty of Medicine, Institute of Anatomy and Center of Cell Therapy and Tissue Repair, Prague, Czech Republic
  • Received:2008-08-19 Revised:2008-11-17 Online:2009-07-28 Published:2009-10-10
  • Contact: T.N Kim

Abstract:

The present work focuses mainly on an in vivo evaluation of ultra fine grained titanium (UFG-Ti) obtained by severe plastic deformation (SPD). The SPD on commercially produced Grade 2 titanium (Cp-Ti) resulted in the refinement of the grain size by several orders of magnitude. Polished surfaces having similar roughness from both UFG-Ti and Cp-Ti were prepared. In vitro test revealed the presence of fibronectin, which was involved in the attachment of the cells to the substrate. Phase contrast micrographs showed the highest signal of fibronectin in UFG-Ti, indicating that it is more cytocompatible than Cp-Ti. In vivo tests, by subcutaneous implantation of the metals in the rats showed the better biocompatibility of UFG-Ti over Cp-Ti. The improved biocompatibility of UFG-Ti was attributed to the presence of surface discontinuities (in the form of nano-defects), surface energy, higher wettability, surface stress and stable TiO2 films, which increased the protein adsorption on the surface.

Key words: Surfaces, Grain size, Titanium, In vivo, Biocompatibility