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Evan Kuester, like many students, found his course work to be less than inspiring. However, he did have access to some really cool tools, such as a large 3D printer that started his mind wandering. Evan had noticed a fellow student on campus a few times. The thing that he noticed was that she had no left hand. Knowing that he had a 3d printer at his disposal, Evan found the inspiration he needed to embark on something wonderful.

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One day he worked up the nerve to simply walk up and introduce himself and propose an idea: Why not 3D print an aesthetically pleasing prosthetic? From that point forward, Evan and Ivania Castillo have been friends.

Evan designed this arm using Rhino with a plugin called Grashopper. He took pictures of Ivania’s arm and measured it in many places. He then began modeling something that would be both functional and pleasing to the eye. The final prosthetic was printed in ABS as a single piece and did require a support structure for that intricate frame work. Once the support structure was dissolved, it was ready to be worn.

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Ivania, the model and the photographer, says this version fits like a glove.

When asked what improvements he would like to make if he had the opportunity, Evan shared a bit of how much of a trial and error process it is.

This is my second attempt at printing prosthesis and this time it came out much better than the first attempt. If I could do it again I would improve the design in every way possible. Ideally the hand moves and is fully functional, however I am limited by current technologies, so I am settling for an aesthetically pleasing prosthetic that celebrates the unique opportunity presented by the model.

Speaking in 3D printing terms, the stability of the model has room for improvement, my first attempt was way to bulky and this one is a hair on the thin side and sacrifices some strength for its aesthetic.

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Evan will surely be producing some fantastic items moving forward. I know I’ll be keeping an eye on his website to see what he comes up with in his future endeavors.

Caleb Kraft

Community Editor for Make:
I get ridiculously excited seeing people make things. I just want to revel in the creativity of the masses! My favorite thing in the world is sharing the hard work of a maker.

I’d always love to hear about what you’re making, so send me an email any time at [email protected]


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