MIT engineers 3D print TPU mesh for flexible medical supports

Cambridge, Massachusetts – Engineers at the Massachusetts Institute of Technology have designed pliable 3D-printed mesh materials for medical applications such as knee and ankle braces. The flexibility and toughness can be tuned to emulate and support softer tissues such as muscles and tendons.

The intricate structures in each mesh can be tailored to make tough, stretchy fabric-like material for personalised, wearable supports. They might even be applicable to implantable devices such as hernia meshes.

To demonstrate the concept, the team printed a flexible mesh for use in an ankle brace. Its structure was tailored to prevent it from turning inwards, while allowing the joint to move freely in other directions.

Other test devices they have made include a knee brace that could conform to the knee as it bends, and a glove with mesh sewn into the top service that conforms to the knuckles, providing resistance against the involuntary clenching that can occur after a stroke.

‘3D-printed clothing and devices tend to be very bulky,’ said study leader Sebastian Pattinson. ‘We were trying to think of how we can make 3D-printed constructs more flexible and comfortable, like textiles and fabrics.’

The study has been published in the journal Advanced Functional Materials.