Biomorphous porous hydroxyapatite-ceramics from rattan (Calamus Rotang)

J Mater Sci Mater Med. 2010 Jan;21(1):131-7. doi: 10.1007/s10856-009-3857-3. Epub 2009 Aug 23.

Abstract

The three-dimensional, highly oriented pore channel anatomy of native rattan (Calamus rotang) was used as a template to fabricate biomorphous hydroxyapatite (Ca(5)(PO(4))(3)OH) ceramics designed for bone regeneration scaffolds. A low viscous hydroxyapatite-sol was prepared from triethyl phosphite and calcium nitrate tetrahydrate and repeatedly vacuum infiltrated into the native template. The template was subsequently pyrolysed at 800 degrees C to form a biocarbon replica of the native tissue. Heat treatment at 1,300 degrees C in air atmosphere caused oxidation of the carbon skeleton and sintering of the hydroxyapatite. SEM analysis confirmed detailed replication of rattan anatomy. Porosity of the samples measured by mercury porosimetry showed a multimodal pore size distribution in the range of 300 nm to 300 microm. Phase composition was determined by XRD and FT-IR revealing hydroxyapatite as the dominant phase with minimum fractions of CaO and Ca(3)(PO(4))(2). The biomorphous scaffolds with a total porosity of 70-80% obtained a compressive strength of 3-5 MPa in axial direction and 1-2 MPa in radial direction of the pore channel orientation. Bending strength was determined in a coaxial double ring test resulting in a maximum bending strength of approximately 2 MPa.

Publication types

  • Evaluation Study
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Algorithms
  • Biocompatible Materials / chemistry
  • Bone Substitutes / analysis
  • Bone Substitutes / chemistry
  • Calamus / chemistry*
  • Ceramics / chemistry
  • Ceramics / isolation & purification*
  • Compressive Strength
  • Durapatite / chemistry
  • Durapatite / isolation & purification*
  • Materials Testing
  • Models, Biological
  • Porosity
  • Spectroscopy, Fourier Transform Infrared
  • Surface Properties
  • Temperature
  • Tissue Scaffolds / chemistry
  • X-Ray Diffraction

Substances

  • Biocompatible Materials
  • Bone Substitutes
  • Durapatite