Development of a Biomimetic Metallic Femoral Stem: Methodological Approach

Vladimir Brailovski; Patrick Terriault; Charles Simoneau; Mathieu Dumas; Bruno Jetté

doi:10.4028/www.scientific.net/MSF.879.1788

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HomeMaterials Science ForumMaterials Science Forum Vol. 879Development of a Biomimetic Metallic Femoral Stem:...

Development of a Biomimetic Metallic Femoral Stem: Methodological Approach

Abstract:

In this communication, a new methodological approach is proposed to develop a biomimetic metallic femoral stem. The design of this stem starts with the definition of an outer skin by reproducing the shape and overall dimensions of a Stryker^® femoral stem to be implanted in an artificial femur model from Sawbones^®. In-house algorithms are then used to generate two types of porous structures inside the outer skin: either a stochastic cubic-based porous structure or an ordered diamond-type porous structure. Next, a model of the femur-stem assembly is developed using the finite element method. The fully dense Stryker stem replica and two porous stems are fabricated using selective laser melting technology. Then, comparative mechanical testing is carried out using the ISO 7206-4 (2010) guidelines. These tests are conducted on an intact artificial femur (reference case) and on the identical femurs, but now implanted with the fully dense and porous stems. Using digital image correlation tools, the results of four series of tests are compared to assess which implant design leads to the lowest stress shielding in the implanted femur. Finally, the experimentally measured strain fields are compared to the numerical predictions to validate the numerical models.

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Materials Science Forum (Volume 879)

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1788-1793

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https://doi.org/10.4028/www.scientific.net/MSF.879.1788

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Online since:

November 2016

Authors:

Vladimir Brailovski, Patrick Terriault, Charles Simoneau, Mathieu Dumas, Bruno Jetté

Keywords:

Additive Manufacturing, Digital Image Correlation, Femoral Stem, Finite Element Analysis, Ordered Diamond-Type Porous Material, Stochastic Porous Materials

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