Model originally uploaded to Thingiverse at https://www.thingiverse.com/thing:2562639.

Just for fun, just jam them into the soft part of the opening. the pumpkin took me about a half hour to carve and is less than 8" tall so you will note the teeth are pretty large. I scaled the incisors up and down 5% at a time to vary the size and so they didn't look all the same.