Static mechanical properties of hydroxyapatite (HA) powder-filled acrylic bone cements: Effect of type of HA powder

Lizette Morejón, Alonso Eduardo Mendizábal, José Angel Delgado García-Menocal, María Pau Ginebra, Conrado Aparicio, Francisco Javier Gil Mur, Montserrat Marsal, Natalia Davidenko, María E. Ballesteros, Josep Anton Planell

Research output: Contribution to journalArticlepeer-review

27 Scopus citations

Abstract

This work reports on the effect of the amount (0, 10, and 30 wt %) and type of HA powder incorporated into an acrylic bone cement on the tensile properties, compression properties, and fracture toughness. The three different types of HA powders used were synthesized in the laboratory and coated with a silane agent prior to incorporation into the cement powder, and differed in particle size, water content, surface area, and crystallinity. It was found that the inclusion of any type of HA powder led to an increase in the tensile modulus (ET), but all the other mechanical properties of the cement decreased (relative to the values of the unfilled cement). The increase in ET is attributed to the good adhesion between the filler and the cement matrix, which is due to the silane coating agent. The decrease in the other mechanical properties may be a consequence of HA powder agglomeration and porosity. Hydroxyapatite morphology and crack-growth mechanisms were analyzed by scanning electronic microscopy (SEM).

Original languageEnglish (US)
Pages (from-to)345-352
Number of pages8
JournalJournal of Biomedical Materials Research - Part B Applied Biomaterials
Volume72
Issue number2
DOIs
StatePublished - Feb 15 2005

Keywords

  • Acrylic bone cement
  • Compressive properties
  • Fracture toughness
  • Hydroxyapatite
  • Tensile properties

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