Low-cost origami 3D-printing technique could improve bone implants

Scientists at Delft University of Technology (TU Delft) in the Netherlands have created a new way to print flat structures which self-fold into complex shapes according to a pre-planned sequence. The research has many applications, including the potential to improve bone transplants, the university said.

origami-1308378_1920

Essentially a combination of the Japanese paper-folding art of origami and 3D printing, the technique created by Amir Zadpoor and his team of researchers is means of creating shape-shifting constructs without the high costs or manual labour usually associated with this process.

Zadpoor’s team used an Ultimaker, one of the most popular 3D printers, and PLA, the most common printing material available. “At about 17 Euro’s per kilo, it’s dirt cheap”, said Zadpoor. “Nevertheless, we created some of the most complex shape-shifting ever reported with it.” The process is also fully automated and requires no manual labour whatsoever.

Zadpoor’s team achieved this by creating a technique in which they simultaneously printed and stretched the material in certain spots. “The stretching is stored inside the material as a memory”, PhD researcher Teunis van Manen explained. “When heated up, the memory is released and the material wants to go back to its original state.”

The researchers also alternated the thickness and the alignment of the filaments in the material.

“What makes the team’s shape-shifting objects so advanced is the fact that they self-fold according to a pre-planned sequence,” TU Delft wrote about the project.

“If the goal is to create complex shapes, and it is, some parts should fold sooner than others”, Zadpoor explained. “Therefore, we needed to program time delays into the material. This is called sequential shape-shifting.”

This approach marks an important step in the development of better bone implants for two reasons, the researchers explained. Firstly, it makes it possible to create prosthetics with a porous interior which allows a patient’s own stem cells to move into the structure of the implant and attach themselves to the interior surface area, instead of just coating the exterior. This will result in a stronger, more durable implant.

Secondly, with this technique, nanopatterns that guide cell growth can be crafted on the surface of the implant, TU Delft explained.

“We call these ‘instructive surfaces’, because they apply certain forces to the stem cells, prompting them to develop into the cells we want them to be”’, said PhD researcher Shahram Janbaz. “A pillar shape, for instance, may encourage stem cells to become bone cells.”

It is impossible to create such instructive surfaces on the inside of a 3D structure. “This is why we decided we needed to start from a flat surface,” said Zadpoor.

Other applications for the research include printed electronics (“by using this technique, it may be possible to incorporate printed, 2D-electronics into a 3D shape,” Zadpoor said) and flat-pack furniture. “Shape-shifting could definitely turn many of our existing 2D worlds into 3D worlds’, he said. “We are already being contacted by people who are interested in working with it.”

————————————————————————————————

The Japanese Connection offers a wide range of professional Japanese translation or interpreting services worldwide, with specialists in many areas including lawbusiness and engineering.  Indeed, our level of specialism coupled with excellent customer service accounts for our ever-expanding list of clients from around the world. To find out how our services can assist you, please visit our website or contact us directly by email. You can also visit our blog guide to doing business in Japan.

Member of: ATCITIProz

 

Advertisements

Leave a comment

Filed under Electronics, Engineering, Health, Medicine, Science, Technology, Uncategorized

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s