The effect of adding 10% of barium sulphate radiopacifier on the mechanical behaviour of acrylic bone cement

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Abstract

Barium sulphate (BaSO4) is commonly used in bone cement as a radiopacifier. The addition of the BaSO4 to the polymeric matrix may cause a decrease in the mechanical properties of the cement. In this work, the effect of adding 10%w/w BaSO4 to a plain polymethylmethacrylate based bone cement was evaluated in terms of endurance limit, fatigue crack propagation and fracture toughness. A lower endurance limit (-13%), as well as a lower fracture toughness (-13%), was found for the radiopaque bone cement in comparison with the plain formulation. Conversely, a substantial decrease (66%) in the crack growth rate was found due to the radiopacifier addition. These are all effects that reflect the weakening of the polymeric matrix, caused by the addition of the radiopacifier.

Original languageEnglish
Pages (from-to)374-382
Number of pages9
JournalFatigue and Fracture of Engineering Materials and Structures
Volume34
Issue number5
DOIs
Publication statusPublished - May 2011

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Keywords

  • acrylic bone cement
  • biomaterials
  • fatigue crack propagation
  • fatigue limit
  • fracture morphology
  • fracture toughness

ASJC Scopus subject areas

  • Mechanical Engineering
  • Mechanics of Materials
  • Materials Science(all)

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