**Skull not completely accurate, please refer to real skull images
Not only does it help show teeth alignment, but it also shows jaw alignment too! Drawing open mouths will always be a struggle for me, so I often refer to skulls to make sure I get the teeth and jaw right.
Often times, people will draw their characters with the upper canine in front of the lower canine, but if you look at a carnivore skull you will see that it's not the case.