Bulk properties and bioactivity assessment of porous polymethylmethacrylate cement loaded with calcium phosphates under simulated physiological conditions

Acta Biomaterialia
M A Lopez-HerediaJ A Jansen

Abstract

Polymethylmethacrylate (PMMA) cements are widely used in spinal surgery. Nevertheless, these types of cements present some documented drawbacks. Therefore, efforts have been made to improve the properties and biological performance of solid PMMA. A porous structure would seem to be advantageous for anchoring purposes. This work studied the bulk physicochemical, mechanical and interconnectivity properties of porous PMMA cements loaded with various amounts of calcium phosphate (CaP). As a measure of bioactivity, changes of PMMA cements under simulated physiological conditions were studied in a calcium phosphate solution for 0, 3, 7, 14, 21 and 28 days. Scanning electron microscopy (SEM), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), micro-computed tomography (μ-CT) and mechanical compression tests were performed to characterize the morphology, crystallographic and chemical composition, interconnectivity and mechanical properties, respectively. SEM allowed observing the result of loading CaP into the porous PMMA, which was corroborated by XRD, FTIR and μ-CT. No interference of the CaP with the PMMA was detected. μ-CT described similar interconnectivity and pore distribution for all CaP percentages. Mecha...Continue Reading

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Jun 22, 2013·Biomaterials·Hoi Man WongKelvin W K Yeung
Feb 4, 2016·Materials Science & Engineering. C, Materials for Biological Applications·Yue SaJohn A Jansen
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