This paper describes a new approach to the design of total hip replacements with the goal of enhancing lubrication and reducing wear. Elastic elements and ellipsoidal cup surface geometry are incorporated into the new design to promote and enhance ‘squeeze-film’ action over ‘wedge-film’ action employed in conventional artificial hip joints. Employing an established finite element lubrication model with a realistic gait cycle and realistic ball-to-cup clearance specifications, it is found that significantly larger minimum film thicknesses and significantly smaller maximum film pressures are predicted over the stance-phase portion of the gait cycle when compared with conventional designs.
A Novel Elastic Squeeze Film Total Hip Replacement
Rochester Institute of Technology,
Rochester, NY 14623
and Aerospace Engineering,
Ithaca, NY 14853
Contributed by the Tribology Division of ASME for publication in the Journal of Tribology. Manuscript received September 15, 2012; final manuscript received June 25, 2013; published online August 6, 2013. Assoc. Editor: Mihai Arghir.
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Boedo, S., and Booker, J. F. (August 16, 2013). "A Novel Elastic Squeeze Film Total Hip Replacement." ASME. J. Tribol. January 2014; 136(1): 011101. https://doi.org/10.1115/1.4024968
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