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Wear analysis in anatomical and reversed shoulder prostheses

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Listed:
  • N. Ribeiro
  • J. Folgado
  • P. Fernandes
  • J. Monteiro

Abstract

This paper describes the development of a computational model to calculate wear rates in total shoulder prostheses, for a 5–150 degrees arm abduction. Anatomical keeled and pegged prosthesis as well as reversed prosthesis were the studied implants. The bone models were built based on computed tomography (CT) images and using a computer aided design-based modelling pipeline. The finite element method was used to solve the contact problem between the surface of the polyethylene (PE) components and the corresponding articular component. The aim of this work was to determine linear and volumetric PE wear, for several radial mismatches, in conditions of pathological (rheumatoid arthritis) and non-pathological bone. Results showed that contact pressures and linear wear developed in anatomical prosthesis were higher than those visualised in reversed prosthesis. However, anatomical prosthesis exhibited a better volumetric wear performance. Moreover, our findings indicated higher values of volumetric wear in higher congruent models and on pathological bone conditions.

Suggested Citation

  • N. Ribeiro & J. Folgado & P. Fernandes & J. Monteiro, 2011. "Wear analysis in anatomical and reversed shoulder prostheses," Computer Methods in Biomechanics and Biomedical Engineering, Taylor & Francis Journals, vol. 14(10), pages 883-892.
    • Handle: RePEc:taf:gcmbxx:v:14:y:2011:i:10:p:883-892
    DOI: 10.1080/10255842.2010.499868
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    References listed on IDEAS

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    1. J. Folgado & P.R. Fernandes & C.R. Jacobs & V.D. Pellegrini, 2009. "Influence of femoral stem geometry, material and extent of porous coating on bone ingrowth and atrophy in cementless total hip arthroplasty: an iterative finite element model," Computer Methods in Biomechanics and Biomedical Engineering, Taylor & Francis Journals, vol. 12(2), pages 135-145.
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