Title: Combined effect of cup abduction and anteversion angles on long-term wear evolution of PCD-on-PCD hip bearing couple

Authors: S. Shankar; K. Gowthaman; M.S. Uddin

Addresses: Department of Mechatronics Engineering, Kongu Engineering College, Erode, Tamil Nadu 638052, India ' Department of Mechanical Engineering, Kongu Engineering College, Erode, Tamil Nadu 638052, India ' School of Engineering, University of South Australia, Adelaide, SA 5095, Australia

Abstract: This paper presents a three-dimensional (3D) finite element (FE) modelling for the estimation of wear evolution on the acetabulum cup against the femoral head for the combinations of different abduction angle (35°, 45° and 55°) and anteversion angle (0°, 10°, 20°, 30° and 40°) for PCD-on-PCD hip bearing components. By implementing the actual physiological hip gait loading conditions and the rotational movement of a normal walking cycle in the FE model, the contact pressure and the sliding distance were calculated to predict the wear. The cup surface was updated in a suitable interval of gait cycles for the estimation of wear. Wear was simulated for 20 years implant's life in a human body. Simulation results showed that higher abduction angle and lower anteversion angle result in the least linear and volumetric wear as compared to other conditions considered.

Keywords: hip joint implants; abduction angle; anteversion angle; contact pressure; finite element method; wear.

DOI: 10.1504/IJBET.2017.084666

International Journal of Biomedical Engineering and Technology, 2017 Vol.24 No.2, pp.169 - 183

Received: 26 Feb 2016
Accepted: 16 May 2016
Published online: 20 Jun 2017 *

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