How to make the jaw rotate properly

Support Animation and Rigging
1

So I’m making a rig for a model of Allosaurus fragilis.

Allosaurus model jaw 1.jpg1920×1080 509 KB

The thing is that when I rotate the jaw in any other position from exactly side on, it gets distorted

Allosaurus model jaw 2.jpg1920×1080 418 KB


What I want to know is how I can open the jaw from anywhere w/o dealing with this.

2

Tick the lock icons next to the rotations you want to lock, in the N-Panel, Transforms.

3

Thank you so much