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Related Experiment Video

Updated: May 23, 2026

Multi-Scale Modification of Metallic Implants With Pore Gradients, Polyelectrolytes and Their Indirect Monitoring In vivo
12:19

Multi-Scale Modification of Metallic Implants With Pore Gradients, Polyelectrolytes and Their Indirect Monitoring In vivo

Published on: July 1, 2013

Multiscale design and multiobjective optimization of orthopedic hip implants with functionally graded cellular

Sajad Arabnejad Khanoki1, Damiano Pasini

  • 1Mechanical Engineering Department, McGill University, Montreal, Quebec, Canada. sajad.arabnejadkhanoki@mail.mcgill.ca

Journal of Biomechanical Engineering
|April 10, 2012
PubMed
Summary

Novel graded cellular implants significantly reduce bone resorption and interface stress in hip replacements, outperforming traditional solid and foam designs. This innovation addresses key causes of revision surgeries for better patient outcomes.

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Area of Science:

  • Biomaterials Engineering
  • Orthopedic Surgery
  • Computational Mechanics

Background:

  • Revision surgeries for total hip arthroplasty are frequently necessitated by poor bone-implant structural compatibility.
  • Key issues include bone-implant interface instability and bone resorption, leading to implant failure.

Purpose of the Study:

  • To introduce a novel graded cellular implant with nonhomogeneous material properties.
  • To develop a multiscale mechanics and design optimization methodology for synthesizing implants that minimize bone resorption and interface failure.

Main Methods:

  • A graded cellular implant design was synthesized using multiscale mechanics and optimization.
  • The methodology was applied to a 2D left implanted femur model with optimized relative density gradients.

Related Experiment Videos

Last Updated: May 23, 2026

Multi-Scale Modification of Metallic Implants With Pore Gradients, Polyelectrolytes and Their Indirect Monitoring In vivo
12:19

Multi-Scale Modification of Metallic Implants With Pore Gradients, Polyelectrolytes and Their Indirect Monitoring In vivo

Published on: July 1, 2013

  • Proof-of-concept fabrication was performed using rapid prototyping to assess manufacturability.

    • Main Results:

    • The optimized cellular implant demonstrated over 70% reduction in bone resorption compared to a solid titanium implant.
    • Interface stress was reduced by over 50% compared to the solid titanium implant.
    • Compared to a 50% relative density foam implant, the cellular implant showed 53% less bone resorption and 65% less interface stress.

    Conclusions:

    • Graded cellular implants offer superior structural compatibility compared to conventional designs.
    • The proposed design and optimization methodology effectively mitigate bone resorption and interface instability.
    • This approach holds significant potential for improving the longevity and success of total hip arthroplasty.