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Stress shielding reduction via graded porosity of a femoral stem implant

  • Hassan S. Hedia , Saad M. Aldousari , Hattan A. Timraz and Noha Fouda
Published/Copyright: July 8, 2019
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Materials Testing
From the journal Materials Testing Volume 61 Issue 7

Abstract

After hip replacement surgery there will be a clear distinction between the stiffness of the metallic implant and the more supple femur bone which will cause stress shielding and bone resorption. In order to treat this phenomenon, the stiffness of the femoral stem implant must be reduced. The effect of using porous and non-porous implants of steel, titanium and FGM will be studied in this research. The assembly of the femur bone and the implant was modeled by means of the 3D finite element method. It will be noticeable from this analysis that for all stem materials using porous implant materials lead to an increase in stress in cortical and cancellous bone as compared to non-porous implant materials which lead to reduced stress shielding and bone resorption. Gradually increasing the porosity of a steel stem from the distal part of the stem to the proximal part increased maximum von Mises stress at the proximal medial cortical bone by 29 % when compared to the non-porous steel stem. By contrast, von Mises stress at the proximal medial cortical bone increased by about 21 % for porous titanium and porous FGM as compared to non-porous titanium and FGM stem implants.

∗Correspondence Address, Prof. Dr. Hassan S. Hedia, Marine Engineering Dept., Faculty of Maritime Studies, King Abdulaziz University, Jeddah, Kingdom of Saudi Arabia, E-mail:

Prof. Dr. Hassan S. Hedia, born in 1959, is Professor of Materials and Solid Mechanics at King Abdulaziz University, Jeddah Saudi Arabia. He received his BSc 1981 in the Mechanical Engineering Dept., Cairo University, Egypt, his MSc 1989 in Production Engineering, at Mansoura University, Egypt, and his PhD in 1996 in the Mechanical Engineering Dept., Leeds University, UK and Mansoura University, Egypt under the channel system. His field of interest is advanced materials, fracture mechanics, stress analysis optimum design, mechanics of materials and biomechanics.

Prof. Dr. Saad M. Aldousari, born 1956, is Professor of Production Engineering in the Mechanical Engineering Dept., Faculty of Engineering, King Abdulaziz University, Jeddah, Saudi Arabia He received his BSc in 1980 from the Mechanical Engineering Dept., College of Engineering, King Abdulaziz University and his PhD and MSc in 1993 from Bradford University, United Kingdom. His field of interest is manufacturing technology.

Dr. Hattan A. Timraz, MNI, is Assistant Professor and Dean in the Faculty of Maritime Studies. He has a PhD in International Maritime Law (2014) from, Swansea University, UK, an LLM in International Commercial and Maritime Law (2008) also from, Swansea University and a BSc (Hons) in Merchant Ship Operations (2003) from Nottingham Trent University, UK.

Dr. Noha Fouda, born in 1973, is Associate Professor in the Production and Mechanical Design Dept. at Mansoura University, Faculty of Engineering, Mansoura, Egypt. She received her BSc in 1995, her MSc in 2000 and her PhD in 2006, in the Production and Mechanical Design Dept., Mansoura University, Egypt. Her fields of interest are biomechanics, optimum design, stress analysis as well as the mechanics of materials. She recieved the Mansoura University Award for the best MSc thesis for the year 2001, the Mansoura University Award for the best PhD thesis for the year 2007 and the State Encouragement Award for the year 2015.

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Published Online: 2019-07-08
Published in Print: 2019-07-04

© 2019, Carl Hanser Verlag, München

Articles in the same Issue

  1. Inhalt/Contents
  2. 10.3139/120.019061
  3. Fachbeiträge/Technical Contributions
  4. Effect of rhenium and cobalt additions on the microstructure and gamma prime phase stability of vacuum arc melted modified nickel-based superalloys grade MGA 1400
  5. Residual strength of fire-exposed glass-reinforced epoxy composite pipes
  6. Impact attenuator conceptual design using lightweight materials and meta-modeling technique
  7. Microstructure and properties of high strength Al-Fe-Cu-Si-Zn alloy (AA8079) produced by mechanical alloying and powder metallurgy
  8. Determination of the static, dynamic and cyclic properties of the heat affected zone for different steel grades
  9. Friction stir welded and deep drawn multi-material tailor welded blanks
  10. Effects of cut-outs on the vibrational characteristics of a hollow shaft system
  11. Effect of heat treatment on wear and corrosion behavior of high chromium white cast iron
  12. Effect of nanoparticle reinforcement on mechanical properties and erosion–corrosion behavior of cast aluminum
  13. Effect of different grain sizes on the static strain aging behavior of bake hardening steel
  14. Effect of fillers on vinylester matrix composites
  15. Impact of oxygen doping on AC impedance, complex dielectric and electrical modulus spectra of a Hg-Ba-Ca-Cu-O ceramic
  16. Effect of TiBAl inoculation on abrasive wear resistance of high Cr white cast iron
  17. Stress shielding reduction via graded porosity of a femoral stem implant
https://doi.org/10.3139/120.111374

Articles in the same Issue

  1. Inhalt/Contents
  2. 10.3139/120.019061
  3. Fachbeiträge/Technical Contributions
  4. Effect of rhenium and cobalt additions on the microstructure and gamma prime phase stability of vacuum arc melted modified nickel-based superalloys grade MGA 1400
  5. Residual strength of fire-exposed glass-reinforced epoxy composite pipes
  6. Impact attenuator conceptual design using lightweight materials and meta-modeling technique
  7. Microstructure and properties of high strength Al-Fe-Cu-Si-Zn alloy (AA8079) produced by mechanical alloying and powder metallurgy
  8. Determination of the static, dynamic and cyclic properties of the heat affected zone for different steel grades
  9. Friction stir welded and deep drawn multi-material tailor welded blanks
  10. Effects of cut-outs on the vibrational characteristics of a hollow shaft system
  11. Effect of heat treatment on wear and corrosion behavior of high chromium white cast iron
  12. Effect of nanoparticle reinforcement on mechanical properties and erosion–corrosion behavior of cast aluminum
  13. Effect of different grain sizes on the static strain aging behavior of bake hardening steel
  14. Effect of fillers on vinylester matrix composites
  15. Impact of oxygen doping on AC impedance, complex dielectric and electrical modulus spectra of a Hg-Ba-Ca-Cu-O ceramic
  16. Effect of TiBAl inoculation on abrasive wear resistance of high Cr white cast iron
  17. Stress shielding reduction via graded porosity of a femoral stem implant
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