Journal of Materials Science: Materials in Medicine

, Volume 5, Issue 3, pp 144–146

Development of an octocalcium phosphate cement

Authors

  • O. Bermúdez
    • Departament de Ciència dels Materials i Enginyeria MetallúrgicaUniversitat Politècnica de Catalunya
  • M. G. Boltong
    • Departament de Ciència dels Materials i Enginyeria MetallúrgicaUniversitat Politècnica de Catalunya
  • F. C. M. Driessens
    • Departament de Ciència dels Materials i Enginyeria MetallúrgicaUniversitat Politècnica de Catalunya
  • J. A. Planell
    • Departament de Ciència dels Materials i Enginyeria MetallúrgicaUniversitat Politècnica de Catalunya
Papers

DOI: 10.1007/BF00053334

Cite this article as:
Bermúdez, O., Boltong, M.G., Driessens, F.C.M. et al. J Mater Sci: Mater Med (1994) 5: 144. doi:10.1007/BF00053334

From previous studies it is known that alpha-tertiary calcium phosphate and dicalcium phosphate form a cement upon mixing with water. In this study this cement was optimized in terms of the milling of the constituents, their molar ratio, the amount of hydroxyapatite added and the water/powder ratio. The optimum Ca/P molar ratio of the cement mixture was 1.36±0.03. X-ray diffraction showed the reaction product to be octocalcium phosphate. Addition of precipitated hydroxypatite of over 3% diminished the final strength of the cement significantly. However, admixtures of only 2% of precipitated hydroxyapatite (a) kept the final compressive strength at 30±5 MPa after soaking in Ringers solution at 37°C, (b) diminished the initial setting time from 27.5 to 10 min and the final setting time from 65 to 40 min, (c) diminished the time in which the final strength was reached from 36 to less than 14 h. The tensile strength of this cement is 19±1% of its compressive strength. The optimum water/powder ratio as found in this study was 0.30 g/g.

Copyright information

© Chapman & Hall 1994