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Modelling a spinal implant


Modelling spine implant with the help of mechanical finite element simulation becomes very popular in medtech and health. It allows engineers and designers to try several cases. And, they can make quick decisions regarding the design of the implant to find the right option.

Objectives from modelling spine implant

When one implants a spinal cage into human body, this one will sustain several loading conditions. Bending, compression, torsion, the medical device needs to adapt to its new environment and to allow all movements from the spine.

Hence it becomes crucial to develop the cage taking into account all these various loads. One has to predict how the spine implant will behave when subject to one or all of these loads together.

Mechanical model of the spinal implant will give directions to the manufacturer on which variable of its design has more impact.

Results from simulation and information extracted

The finite element analysis can follow guidelines from international standards, similar to international standards for experimental machines.

In this case, the spine implant model was made of the cage and a biomaterial filling the volume of the cage. One investigated separate loads and mixed load conditions, for static and dynamical cases. It showed areas of higher stress related to the thickness of the cage wall. Hence the thickness variable could be optimised for the specific scenario this implant was designed for.

Modelling a spinal implant

Figure shows initial configuration of the model of the cage for spinal implant.

Meshing the cage and biomaterial

This figure shows one mesh used for numerical simulation of spinal implant and biomaterial.

Bending load from implant model

Mechanical displacement and deformation of the spine implant under bending load. Highest displacements display red colour.

Torsional load from implant model

Mechanical displacement and deformation of the spinal implant under torsional load.

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Our simulation expertise can help companies from industries such as Medtech (health), audio, sensors, energy and environment but also research labs that would need powerful simulation hardware and software. Contact us to learn more.

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