Geometry Problems in Unity game build

Hello, I'm having some geometry issues that appears only when the game is built. It looks fine in the editor and in Maya, but on the game build, it is broken.

The geometry is a mouth that is animated to close. On the editor there are no noticeable problems. But on the game build, the bottom part of the geometry gets jagged and off. I don't know if there's a setting that I need to change before the build is made, or if I need to adjust the animation.

Any help on this would be greatly appreciated!