3D printed prosthesis

In the United States, about 5.6 million people have limb differences, meaning they were born without a limb or lost one due to injury or illness. For many of these individuals, getting a prosthetic device—a replacement limb—can be very expensive and difficult to afford. This cost often becomes a major barrier to receiving the help they need.

That’s where 3D printed prostheses come in. Unlike traditional prostheses, which can cost thousands of dollars, 3D printed versions are a much more affordable option. This technology uses a special printer to build layer-by-layer, creating a custom prosthetic that fits the user’s unique needs. Thanks to this innovation, many more people can access the support and mobility they deserve.

Background

The first 3D printed prosthetic was created in 2011. It began when a carpenter named Richard Van As lost two fingers in an accident. He wanted to get back to work but couldn’t afford a traditional prosthetic. He teamed up with Ivan Owen, a performer who had made a moving puppet hand. Together, they built a mechanical prosthetic for Van As and then used a 3D printer to make a new version called "Robohand". They shared their design and instructions on Thingiverse, showing others how to build it.

3D designing custom prosthesis

Creating a 3D printed prosthesis starts with making a precise model of the residual limb. This can be done using 3D scanning, MRI, or CT scan. The model is then used to design a prosthesis, which is printed using different 3D printing methods. After printing, the prosthesis is cleaned and assembled with additional parts like support rods or bolts.

3D printing helps create prototypes quickly, which is very useful for making custom sockets that fit well and feel comfortable. It also allows for creative designs, including different colors and textures, which can boost a person's confidence and make using a prosthesis more enjoyable. Projects like Limbitless Solutions let children design their own colorful and unique prostheses.

Open source design

Open source designs for prostheses offer a low-cost alternative, thanks to collaborative efforts from many people. Projects like Enable provide step-by-step guides for building and assembling prostheses, along with a community program that connects individuals needing a prosthesis with volunteers who can build one. Other projects, such as Cyborg Beast, focus on creating special prostheses for kids, offering various options based on the level of limb difference and size. Some programs even let users input custom details to get a perfect fit.

However, not everyone gets the same results from open source designs. Designing prostheses with proper attention to forces and materials helps create better devices. Experienced designers also follow important medical guidelines. Research, such as work done at Carnegie Mellon University, uses machine learning to study the mechanical properties of 3D printed parts. This research helps improve the design process, making it easier for individuals to create effective prostheses.