Tag Archives: knees

New Knees, using 3D printing

I’m not at the point of needing to get my knees fixed yet, but they definitely ain’t what they used to be, so I was fascinated by the idea of using 3D printing to build the implants. More importantly, I was thrilled by the idea that the bioinks used in the 3D printing process could actually encourage the body to create new cells itself:

‘…the researchers used several bioinks together to print the entire fibrocartilage tissue layer by layer, in an interleaved crosshatch pattern. The first was a composite gellan gum and fibrinogen ink, which encourages the body’s own cells to repopulate. The second bioink is a silk fibroin methacrylate, which helps keep the structure strong and flexible.’

Wake Forest Institute for Regenerative Medicine (WFIRM)

You can find the whole article on the New Atlas website. It’s quite short and not super technical, so if you’re like me and starting to creak, check it out.

I have to say I’m quite looking forward to becoming a ‘bionic’ woman in the years ahead. 🙂

cheers
Meeks


And then there were…ostriches?

Yes, I’ve been researching ostriches today, but only for their legs. In particular, I wanted to find out why their knees bend backwards.

Well, it turns out that ostrich knees don’t bend backward at all; the thing that looks like a knee is actually an ankle. But who am I to criticize a bird that’s capable of running between 60 and 70 km per hour!

If you’re interested in this amazing bird, you can find a really good article about it right here. For me, though, the point about ostrich legs is that they make the bird look as if it’s standing upright, more or less. This makes the leg structure perfect for the Vokh as I want them to walk upright as well.

I’ve only just started to work on the Vokh legs so you’ll have to use your imagination rather a lot. First I traced around a pair of ostrich legs:

[Note: I found the Corel Draw B-Spline drawing tool really handy for tracing the outline.]

Next, I found a picture of some black opera gloves, you know, the kind that go half way up to the shoulder. To my great joy, the elbows were shown as slightly bent. I traced around them too, but this time, I used the tracing to cut out the glove I wanted:

Yes, it’s the same glove flipped horizontally. 🙂

Fitting the glove texture into the ostrich legs is going to take some tricky re-engineering, especially as I need to add ‘proper’ raptor feet complete with killing claws, but that’s for another day. I’m thrilled to have solved the problem of the legs so easily.

As always, thanks for joining me on these odd detours into research and graphics. 🙂

cheers

Meeks

 


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