Abstract
Arthroplasty has evolved with the application of electron beam melting (EBM) in the
manufacture of porous mediums for uncemented fixation. Osseointegration of EBM and
plasma-sprayed titanium (Ti PS) implant dowels in adult sheep was assessed in graduated
cancellous defects and under line-to-line fit in cortical bone. Shear strength and
bony ingrowth (EBM) and ongrowth (Ti PS) were assessed after 4 and 12 weeks. Shear
strength of EBM exceeded that for Ti PS at 12 weeks (P = .030). Ongrowth achieved by Ti PS in graduated cancellous defects followed a distinctive
pattern that correlated to progressively decreasing radial distances between defect
and implant, whereas cancellous ingrowth values at 12 weeks for the EBM were not different.
Osteoconductive porous structures manufactured using EBM present a viable alternative
to traditional surface treatments.
Keywords
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Article info
Publication history
Published online: April 13, 2012
Accepted:
February 27,
2012
Received:
October 31,
2011
Footnotes
The Conflict of Interest statement associated with this article can be found at doi:10.1016/j.arth.2012.02.025.
Identification
Copyright
© 2012 Elsevier Inc. Published by Elsevier Inc. All rights reserved.
