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Bone ingrowth potential of electron beam and selective laser melting produced trabecular-like implant surfaces with and without a biomimetic coating

  • J. E. Biemond
  • G. Hannink
  • N. Verdonschot
  • P. Buma
Article

Abstract

The bone ingrowth potential of trabecular-like implant surfaces produced by either selective laser melting (SLM) or electron beam melting (EBM), with or without a biomimetic calciumphosphate coating, was examined in goats. For histological analysis and histomorphometry of bone ingrowth depth and bone implant contact specimens were implanted in the femoral condyle of goats. For mechanical push out tests to analyse mechanical implant fixation specimens were implanted in the iliac crest. The follow up periods were 4 (7 goats) and 15 weeks (7 goats). Both the SLM and EBM produced trabecular-like structures showed a variable bone ingrowth after 4 weeks. After 15 weeks good bone ingrowth was found in both implant types. Irrespective to the follow up period, and the presence of a coating, no histological differences in tissue reaction around SLM and EBM produced specimens was found. Histological no coating was detected at 4 and 15 weeks follow up. At both follow up periods the mechanical push out strength at the bone implant interface was significantly lower for the coated SLM specimens compared to the uncoated SLM specimens. The expected better ingrowth characteristics and mechanical fixation strength induced by the coating were not found. The lower mechanical strength of the coated specimens produced by SLM is a remarkable result, which might be influenced by the gross morphology of the specimens or the coating characteristics, indicating that further research is necessary.

Keywords

Selective Laser Melting Bone Ingrowth Lateral Collateral Ligament Electron Beam Melting Selective Laser Melting Process 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer Science+Business Media New York 2012

Authors and Affiliations

  • J. E. Biemond
    • 1
  • G. Hannink
    • 1
    • 2
  • N. Verdonschot
    • 1
    • 3
  • P. Buma
    • 1
  1. 1.Orthopaedic Research LaboratoryRadboud University Nijmegen Medical CentreNijmegenThe Netherlands
  2. 2.Department of Operating RoomsRadboud University Nijmegen Medical CentreNijmegenThe Netherlands
  3. 3.Laboratory for Biomechanical EngineeringUniversity of TwenteEnschedeThe Netherlands

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