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Bioactivation of calcium deficient hydroxyapatite with foamed gelatin gel. A new injectable self-setting bone analogue

  • M. Dessì
  • M. A. Alvarez-Perez
  • R. De Santis
  • M. P. Ginebra
  • J. A. Planell
  • L. Ambrosio
Article

Abstract

An alternative approach to bone repair for less invasive surgical techniques, involves the development of biomaterials directly injectable into the injury sites and able to replicate a spatially organized platform with features of bone tissue. Here, the preparation and characterization of an innovative injectable bone analogue made of calcium deficient hydroxyapatite and foamed gelatin is presented. The biopolymer features and the cement self-setting reaction were investigated by rheological analysis. The porous architecture, the evolution of surface morphology and the grains dimension were analyzed with electron microscopy (SEM/ESEM/TEM). The physico-chemical properties were characterized by X-ray diffraction and FTIR analysis. Moreover, an injection test was carried out to prove the positive effect of gelatin on the flow ensuing that cement is fully injectable. The cement mechanical properties are adequate to function as temporary substrate for bone tissue regeneration. Furthermore, MG63 cells and bone marrow-derived human mesenchymal stem cells (hMSCs) were able to migrate and proliferate inside the pores, and hMSCs differentiated to the osteoblastic phenotype. The results are paving the way for an injectable bone substitute with properties that mimic natural bone tissue allowing the successful use as bone filler for craniofacial and orthopedic reconstructions in regenerative medicine.

Keywords

Foam Gelatin Osteogenic Differentiation Environmental Scan Electron Microscopy Extra Cellular Matrix 
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

This study was financially supported by the SmartCap Project FP6-STREP NMP3-CT-2005-013912. The authors wish to thank Dr. M. Colella for his precious assistance with SEM and ESEM analysis, Dr. A. Scala for contact angle measurements and Dr. S. Zeppetelli for biological assistance.

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Copyright information

© Springer Science+Business Media New York 2013

Authors and Affiliations

  • M. Dessì
    • 1
    • 4
  • M. A. Alvarez-Perez
    • 1
    • 5
  • R. De Santis
    • 1
  • M. P. Ginebra
    • 2
  • J. A. Planell
    • 2
    • 3
  • L. Ambrosio
    • 1
  1. 1.Institute of Composite and Biomedical MaterialsNational Research Council of ItalyNaplesItaly
  2. 2.Department of Materials Science and MetallurgyTechnical University of CataloniaBarcelonaSpain
  3. 3.Institute for Bioengineering of CataloniaBarcelonaSpain
  4. 4.School of Pharmacy & Biomolecular SciencesUniversity of BrightonBrightonUK
  5. 5.Faculty of DentistryNational Autonomous University of Mexico (UNAM)MexicoMexico

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