If you like these you should check out the original, done by LittleTup and check out all of the other awesome models while you're there.
This is ** not a remix**, but definitely inspired by "Pumpkin Cosplay Teeth". My daughter and I were looking at them and we were about to download them, but she wanted us to design our own. So if you like these go ahead and download them. If you want to win your local pumpkin carving contest, check out the originals.
They are support free. I would advise taking some measurements of your planned jack-o-lantern's mouth so you can scale these how you want them. You might also want to randomly adjust the scale of a few teeth slightly just to give them more of a natural asymmetrical look.
Have Fun Printing and Enjoy!