[jopsen]

Even if you find a safe resin.

Might there be microscopic layer lines? Or other unknowns you're not familiar with? Making 3d prints that can be cleaned is non-trivial, maybe there is a surface finish involved, etc.

Also how do you know your design is correct? Won't cause your teeth to move? A 3d scan doesn't mean you know what a mouth guard should look like.

All of a sudden, having a product that's made with a vetted process is pretty attractive -- and 600 USD seems like a bargain.

What's the cost of having your teeth fixed, if they accidentally move? (Not to mention the discomfort, which can be considerable)

[tombert]

I'm not entirely sure what you're trying to convince me of. I did pay the $600, I even said that it's probably a cheap price to pay to treat the apnea.

That doesn't really change the fact that it feels kind of viscerally wrong to pay $600 to pay for two glorified pieces of plastic, and a part of me still does feel I could clone it competently. I haven't bothered for the aforementioned safe resin, and also because I already have it and I have enough money to just eat the cost and complain about it.