Abstract
Initial stability with limited micromotion in uncemented total hip arthroplasty acetabular
components is essential for bony attachment and long-term biomechanical fixation.
This study compared porous titanium fixation surfaces to clinically established, plasma-sprayed
designs in terms of interface stability and required seating force. Porous plasma-sprayed
modular and metal-on-metal (MOM) cups were compared to a modular, porous titanium
designs. Cups were implanted into polyurethane blocks with1-mm interference fit and
subsequently edge loaded to failure. Porous titanium cups exhibited 23% to 65% improvement
in initial stability when compared to plasma-sprayed cup designs (P=.01): a clinically significant increase, based on experience and prior literature.
The results of this study indicate increased interface stability in porous titanium-coated
cups without significantly increasing the necessary force and energy required for
full seating.
Keywords
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Article info
Publication history
Published online: November 12, 2012
Accepted:
July 27,
2012
Received in revised form:
June 8,
2012
Footnotes
The Conflict of Interest statement associated with this article can be found at http://dx.doi.org/10.1016/j.arth.2012.07.035.
Identification
Copyright
© 2013 Elsevier Inc. Published by Elsevier Inc. All rights reserved.
