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Ex vivo alendronate localization at the mesoporous titania implant/bone interface

  • Johan Karlsson
  • Necati Harmankaya
  • Stefan Allard
  • Anders Palmquist
  • Mats Halvarsson
  • Pentti Tengvall
  • Martin Andersson
Biocompatibility Studies
Part of the following topical collections:
  1. Biocompatibility Studies

Abstract

An attractive approach in implant technology is local drug delivery, and design of efficient, safe and reliable treatments. Our hitherto strategy has been to coat Ti implants with a thin mesoporous TiO2 film that in turn is loaded with an osteoporosis drug, such as Alendronate (ALN) that is known to suppress osteoclastic activity. This system has proven highly successful and results in excellent osseointegration. However, more detailed information about drug-release and distribution at the bone/implant interface is needed. In this study, 14C-ALN loaded titanium implants were placed up to 8 weeks into rat tibia and the spatial–temporal distribution of the drug was evaluated. Autoradiography data demonstrated a sustained release of 14C-ALN and the released drug remained bound to bone in close vicinity, within 500 micrometers, of the implants. Liquid scintillation counting experiments confirmed that the distal transport of released 14C-ALN was extremely low. The results are favorable as they show that ALN stays for a long time in the vicinity of the implant and may therefore improve for a long time the mechanical fixation of bone anchored implants. Moreover, these findings suggest due to the low systemic spreading a minimal risk of Alendronate related systemic side effects.

Keywords

Alendronate Mesoporous TiO2 Mesoporous Titania Osteoporosis Drug Autoradiographic Image 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Notes

Acknowledgments

We gratefully thank the Materials Area of Advance at Chalmers University of Technology and University of Gothenburg, BIOMATCELL VINN Excellence Center for Biomaterials and Cell Therapy, Hjalmar Svensson foundation, and the Swedish Research Council, VR (K2012-52X-09495-25-3, 621-2011-6037) for their financial support. A grant from Knut and Alice Wallenberg Foundation for the acquiring of the FEG-SEM instrument is gratefully acknowledged.

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Copyright information

© Springer Science+Business Media New York 2014

Authors and Affiliations

  • Johan Karlsson
    • 1
  • Necati Harmankaya
    • 2
  • Stefan Allard
    • 3
  • Anders Palmquist
    • 2
  • Mats Halvarsson
    • 4
  • Pentti Tengvall
    • 2
  • Martin Andersson
    • 1
  1. 1.Department of Chemical and Biological Engineering, Applied ChemistryChalmers University of TechnologyGothenburgSweden
  2. 2.Department of BiomaterialsSahlgrenska Academy at University of GothenburgGothenburgSweden
  3. 3.Department of Chemical and Biological Engineering, Nuclear ChemistryChalmers University of TechnologyGothenburgSweden
  4. 4.Department of Applied Physics, Materials MicrostructureChalmers University of TechnologyGothenburgSweden

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