Exactly what I thought about it, Max. A person has a broken arm, so they bring in Edward the Troll to force your broken arm into that sheath. To even get a non-broken arm into it could be a problem, since the wrist is smaller in cross-section than the forearm or the hand. Who can force their hand through a stiff form that was sized to be snug on your wrist.
Reminds me of the way some say to get out of handcuffs. ——"Just dislocate your thumb... Either pull it out of its socket or break it and move the pieces out of the way. You'll be out of the cuffs in no time."
I am reminded of a guy who was put in handcuffs by an FBI agent, with his arms around a pole. He was/is a big guy (biker) about 6 foot 8 and close 300 pounds.
He broke the handcuffs while the FBI agent was not watching him and walked away.
[ For the metric people out there, 6' 8" would be 203+ centimeters. 300 pounds is about 136+ kg. ]
I really like the printed cast idea, but that Pola concept was kind of creepy (basically a camera that gets implanted into your eye and spews film out of your temple). Very interesting link indeed, Max
Not just that, for the Pola thing... It looks like a large component of it is behind the eye taking up a lot of volume. I would prefer NOT to have them remove the bone of the eye socket, nor that much of my brain to put in a really 'cheesey' camera. I think the page is just a joke (maybe not intentionally so, but still a joke).
As to the pictures of a "fitted" cast, I think they printed one to approximate size and then looked for someone who could get their arm into it. (Notice the largest picture of a woman's arm inside one of them. Look at the area below the wrist. Quite a large gap there to have been fitted to her, don't you think?)
The concept is all right, but I think this is just a "concept" page so far. —Maybe trying to sell their idea to some rich doctor or medical center.
I think this is a very clever concept. The plaster cast is way overdue for an upgrade and as 3D printing becomes cheaper this will be a good practical alternative.
I have not worn a cast before but I suspect this design would be much lighter and more comfortable with less itching. It is also waterproof which solves a lot of problems for patients.