valves imprimées en 3D

Researchers 3D print heart valves that could grow in the body – 3Dnatives

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3d printed valves

A team of researchers recently announced that they have developed a new form of 3D-printed heart valves. These parts are designed to give the patient’s own cells a chance to form new cells and grow with the rest of the body. This development should help reduce complications associated with transplants. As you know, the use of additive manufacturing in the medical sector has grown exponentially as it has allowed scientists and doctors to explore possibilities that were totally unimaginable just a few years ago. The project is still in the research and development phase, but nonetheless represents a significant advance for the health sector.

The team includes Petra Mela, Professor of Medical Materials and Implants at the Technical University of Munich (TUM), and Professor Elena De-Juan Pardo from the University of Western Australia. Together, they worked on creating 3D-printed heart valves, which can be used as implants for life, due to their ability to form new tissue. Using additive manufacturing technologies, in combination with special biodegradable materials, professionals have been able to create implants that replicate the unique complexities of a human organ.

The 3D printed valves are highly detailed (photo credits: Andreas Heddergott/TUM)

Although other types of heart valve implants already exist, their use always leads to different complications. Mechanical valves, for example, tend to form blood clots on metal surfaces, which can lead to serious complications. In addition, patients must take blood thinners for life and limit their physical activity. Another drawback is that these valves cannot grow and eventually need to be replaced, as Petra Mela explains: “ Our goal is to design bioinspired heart valves that promote the formation of new functional tissues in patients. Children would especially benefit from this solution, as current heart valves do not grow with the patient and need to be replaced over the years in multiple surgeries. Our heart valves, on the other hand, mimic the complexity of natural heart valves and are designed to allow the patient’s cells to leak into the scaffold.. »

The use of special technology for 3D printed heart valves

In order to mimic the fine biological structures of the human organ, the researchers turned to a new additive manufacturing technology called “fused electrowriting.” It is essentially an extrusion process in which a polymer is heated, melted, and ejected from a printhead as a jet of liquid. However, the particularity of this process lies in the use of a high-voltage electric field, which is applied to the jet and makes the resulting fiber five to fifty micrometers thick, which allows the machine to print extremely detailed and produce with great precision. models To ensure the best material is used for the implant, the team chose to use medical-grade polycaprolactone (PCL), which is cell compatible and biodegradable.

Petra Mela, professor of medical materials and implants at the Technical University of Munich

As stated above, the long-term goal is to create implants for children that can stay inside the body and grow with the patient. The hope is that, over time, the cells will settle into the micropore spaces, which are smaller than the pores in the LCP structure. Although there is still a long way to go, the team is convinced this is a huge improvement for people with heart valve disease and they will soon be moving on to animal testing. To learn more about the project, click HERE.

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*Cover photo credits: Andreas Heddergott / TUM

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