Journal
JOURNAL OF THE MECHANICAL BEHAVIOR OF BIOMEDICAL MATERIALS
Volume 21, Issue -, Pages 37-46Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jmbbm.2013.01.017
Keywords
Bone in-growth; Porous; Titanium; Hip replacement stem
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A new surface architecture (OsteoAnchor) for orthopaedic stem components has been developed, which incorporates a multitude of tiny anchor features for embedding into the bone during implantation. It was tested for its ability to provide improved primary fixation compared to existing surface coatings. Friction testing was performed on bovine trabecular bone. It was found that OsteoAnchor provided up to 76% greater resistance to transverse motion under simultaneous normal loading compared to the porous tantalum. Micromodon testing was performed on stem components implanted in cadaver ovine femurs. The micromotion amplitudes for the OsteoAnchor stem were significantly lower than for a corresponding plasma sprayed stem. These results demonstrate that OsteoAnchor has the potential to provide improved primary fixation for stem components in joint replacement operations. (C) 2013 Elsevier Ltd. All rights reserved.
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