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A Nano-Composite Poly(Methyl-Methacrylate) Bone Cement

Published online by Cambridge University Press:  21 February 2011

Andreas H. Gomoll ,
Anuj Bellare ,
Wolfgang Fitz ,
Thomas S. Thornhill ,
Richard D. Scott ,
Peter R. Jemian  and
Gabrielle G. Long
Andreas H. Gomoll
Affiliation:
Orthopaedic Research Laboratory, Department of Orthopaedic Surgery, Brigham and Women's Hospital, Harvard Medical School, Boston, gomoll@rics.bwh.harvard.edu
Anuj Bellare
Affiliation:
Orthopaedic Research Laboratory, Department of Orthopaedic Surgery, Brigham and Women's Hospital, Harvard Medical School, Boston, gomoll@rics.bwh.harvard.edu
Wolfgang Fitz
Affiliation:
Orthopaedic Research Laboratory, Department of Orthopaedic Surgery, Brigham and Women's Hospital, Harvard Medical School, Boston, gomoll@rics.bwh.harvard.edu
Thomas S. Thornhill
Affiliation:
Orthopaedic Research Laboratory, Department of Orthopaedic Surgery, Brigham and Women's Hospital, Harvard Medical School, Boston, gomoll@rics.bwh.harvard.edu
Richard D. Scott
Affiliation:
Orthopaedic Research Laboratory, Department of Orthopaedic Surgery, Brigham and Women's Hospital, Harvard Medical School, Boston, gomoll@rics.bwh.harvard.edu
Peter R. Jemian
Affiliation:
University of Illinois, Urbana-Champaign, IL
Gabrielle G. Long
Affiliation:
National Institute of Standards and Technology, Gaithersburg, MD
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Abstract

Poly(methyl methacrylate) (PMMA) based orthopaedic bone cements contain 1-3 Pim size radiopacifier particles. Incomplete dispersion of these particles leads to the presence of 50-200 μm size agglomerates. These large defects are sites of high-stress concentration that reduce the fracture toughness of PMMA. In this study, the micrometer-sized radiopacifying particles of a commercial bone cement were replaced by nanosized fillers. Both, commercial and nanocomposite PMMA bone cements were characterized using ultra-small angle x-ray scattering and low voltage scanning electron microscopy; mechanical properties were evaluated using ASTM standard tensile testing. The results showed a substantial reduction of particle agglomerate size and a significant increase in tensile properties of the nanocomposite over that of the standard microcomposite bone cement.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 581: Symposium F – Nanophase & Nanocomposite Materials II , 1999 , 399
Copyright
Copyright © Materials Research Society 2000

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References

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