Re-designing splints: aesthetics, comfort and mobility with a maximum protection

Solution

MIM is a 3D printed, customizable splint for people with carpal tunnel syndrome that guarantees aesthetics, personalized protection and maximum freedom of movement according to the physiognomy of each user.

3D printing

MIM can be printed with a multijet fusion press (MJF) with PA11. This material is biocompatible and is characterized by its elasticity and very good surface finish. MIM aims to prevent palmar flexion of the wrist and allow extension, as well as almost full radial and ulnar abduction.

How does it restrict only "forbidden" movements?

What makes the wrist brace prevent palmar flexion is the geometry of the spheres present in the splint. Its spherical pattern is filled with a 1mm thick base. When a palmar flexion is performed, the spheres come together and this prevents flexion. On the other hand, when an extension is performed, the spheres separate and allow the wrist to move in that direction.

Process

The user scans their wrist with a smartphone, customize the piece (color, design) and we 3D print the product for them. If they provide an echocardiography of their wrist, it is also possible to adapt the splint to the exact position where the carpal tunnel is less compressed and personalise the “allowed” mouvements to each user.

Problem

Carpal tunnel syndrome affects between 3% and 6% of the world's adult population, and this number increases every year.

This syndrome occurs when there is a compression of the median nerve, that goes under the carpal tunnel. This nerve is responsible for allowing the movement and feeling of the palm of the hand, thumb, index finger and middle finger. Therefore, when the nerve is compressed it leads to symptoms that include pain or cramps that may extend to the elbow, numbness, tingling and weakness of the hand and arm.

Currently, people use wrist splints to treat carpal tunnel, or while they wait for a surgery. These splints encounter many problems including discomfort, lack of aesthetics, they are difficult to put on, can't get wet and they restrict the wrist movement more than what is really necessary. These problems can cause a huge burden on users' quality of life.