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Lending a Hand: Student 3-D Prints Functional, Affordable Prosthetic

December 12, 2016 By Breana Cacciottil, Phys.org

With a 3-D printer and about $15, senior physics major Ryan Bouricius was able to create a functional prosthetic hand that can be used to grip, write and even catch a ball. With the assistance of a non-profit group, the hand will one day be matched to a person in need of such a prosthesis.

 

Ryan Bouricius used the college’s 3D printers to make a functional prosthetic hand. (Credit: Ithaca College)

The prosthetic hand is designed for a person who still has the ability to move their wrist. By moving their wrist, they can control and use the hand’s fingers to grab and hold various objects.

Bouricius, who as a teaching assistant helps run the Ithaca College 3-D Printing Lab, became interested in building prostheses after coming across a YouTube video of someone printing and assembling prosthetic hands for little cost. He instantly became interested. After doing some research, he found free designs online, printed out the pieces and assembled a hand in one day. Ever since, he has been working on the prosthetic and figuring out ways it can be improved.

“I like to use it around the apartment to see what problems are faced, because I can only imagine what it would be like to actually need a prosthetic hand,” Bouricius said. “It’s given me an appreciation for what human hands can do and I’ve been trying to match it as best as I can.”

Through his testing and tinkering, Bouricius has made changes to the original design that give the hand more functionality. For example, he changed the orientation of the hand’s thumb, which was originally perpendicular to the fingers, so that it can more effectively grab a variety of items. He has also worked to optimize the grip for various items, such as a marker or a coffee mug.

Physics Professor Michael ‘Bodhi’ Rogers oversees the 3-D Printing Lab and has watched as Bouricius worked to improve the prosthesis. He says that the 3-D-printed hand has many advantages over an electronic prosthesis.

“There are people who are working on electronic hands, but they’re extremely expensive, not easy to repair, and many are not available for sale,” Rogers said.

Bouricius says that unlike electronic hands, which are typically made from metal, complex components are not more expensive to make for his mostly plastic model.

“The nice thing about 3-D printing is that the price only has to do with the amount of plastic used, not the complexity of the piece,” Bouricius said. “So even though my modified pieces are trickier shapes, since it’s the same amount of plastic, it’s the same amount of money.”

This is especially important for families with children who need prostheses. Because children outgrow them quickly, the costs of prostheses can be considerable over time. With 3-D printing, however, Bouricius’ model can be affordably re-printed in larger sizes as the child grows.

Bouricius is working with eNABLE, a non-profit organization that matches 3-D-printed prostheses with those in need of them, to find a recipient for his printed hand.

“They know I live in New York, so if someone contacts them they will look at a map and tell them there’s someone at Ithaca College,” Bouricius said. “Once they contact us then it’s left to us to work out the rest.”

Rogers and Bouricius are currently working on a collaboration with the Department of Occupational Therapy in the School of Health Sciences and Human Performance, whose faculty have expertise and experience working with prostheses. Once eNABLE finds a recipient for the hand, occupational therapy faculty and students will assist Rogers and Bouricius with final adaptations to the hand in order to help the recipient get the perfect fit for long-term wear.

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