Thumb MCP Splint with PVX (for hypermobile thumb)

Hiii this is the splint I made for my thumb since it is hypermobile, uses a similar design to silver ring splints. This prevents my thumb from bending too far and causing wrist pain.

I designed this to be durable (has gone through many iterations) and prints in strength preset which helps a lot.

I don't recommend this unless you're same size as me (dist 9.5, prox 30x20) but resizing it might work.

Here's the onshape also, if you want to modify it to suit your needs.

https://cad.onshape.com/documents/58c8de4452dbe545d0b66249/w/9e16356b9106b194ab604c39/e/e0573a25294b2775f9f8accf

Printing Tips:
I recommend printing with supports (just tree supports slim works) that helps avoid issues of it popping off of bed early during the final bridging of the outer loop, I find this also makes the top inner loop surfaces smoother.

Material:
I use regular PLA (or PLA+) and it works well. You can use transparent or matte filaments but I find they are weaker. I also tried 95A TPU and it was too squishy to be useful at all. I don't recommend using carbon fiber filament, for this purpose it isn't really stronger (in fact I found it weaker) and it can leave embedded strands in your thumb which can cause irritation.

Comfort:
Occasionally it'll have a line of filament scratching the middle of your thumb, you can just use pliers (or maybe sanding idk) to remove that.