Review (3/5): You're on your Own!
I'm still trying two weeks later to get a perfect fit that sticks! No instructions come with these, so you'll have to improvise, search online, or know what you're doing in DIY "dentistry." It's a good idea for an emergency or temporary gap-filler, but if you've never worked with thermoplastic before, I think some kind of helpful hints & shaping guards would really make life easier with these materials--& save a LOT of time regretting to get it "right." I have a small jaw & bite, so it's taxing. But once you get one setting of one tooth, you'll certainly feel a lot better for the time being!!