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In vitro release kinetics and physical, chemical and mechanical characterization of a POVIAC ® /CaCO 3 /HAP-200 composite

  • Javier Aragón
  • Ramón González
  • Gastón Fuentes
  • Luca Palin
  • Gianluca Croce
  • Davide Viterbo
Article

Abstract

Coralline calcium-hydroxyapatite and calcium carbonate from Porites Porites coral were added to a polymeric matrix based on polyvinyl acetate (POVIAC®), to obtain a novel bone substitute composite as well as a system for the controlled drug (cephalexin) release. Composite samples with different compositions were characterized by physical–chemical and mechanical methods. Furthermore, the in vitro release profile of cephalexin and the kinetic behavior of its release from these composites were analyzed by appropriate mathematical models. It was shown that there is no chemical interaction between the inorganic filler and the polymer matrix, each conserving the original properties of the raw materials. The compressive mechanical strength and Young modulus of the composite with 17.5% of POVIAC®, has better mechanical properties than those of cancellous bone. The variation of POVIAC® content can affect the cephalexin release kinetic in the composite. The cephalexin release mechanism from the composites can be considered as the result of the joint contribution of a prevailing Fickian diffusion and of polymer chain relaxation. It was also demonstrated that cephalexin is occluded inside the composites and not on their surface.

Keywords

Compressive Strength Cancellous Bone Polyvinyl Acetate Bone Substitute Cephalexin 
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 thank FONDAZIONE ISI and the Association for the Promotion of the Scientific and Technological Development of Piedmont (ASP) for their financial support to this scientific project.

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Copyright information

© Springer Science+Business Media, LLC 2011

Authors and Affiliations

  • Javier Aragón
    • 1
  • Ramón González
    • 2
  • Gastón Fuentes
    • 3
  • Luca Palin
    • 4
  • Gianluca Croce
    • 4
  • Davide Viterbo
    • 4
  1. 1.National Center for Scientific ResearchHavanaCuba
  2. 2.Center for NeuroscienceHavanaCuba
  3. 3.Biomaterials CenterUniversity of HavanaHavanaCuba
  4. 4.Department of Advanced Science and TechnologyUniversity of Piemonte Orientale “A. Avogadro”AlessandriaItaly

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