Herbivore Jaw Fragment, Dinosaur Park Formation

[Flyfishertoo]

Hi folks,

Christmas break has @dingo2  and I organizing our Late-Cretaceous collection for a new display. While most of our stuff is carnivore teeth, we do have some other good pieces as well. One is this jaw fragment from DPF. I was able to stabilize it and polish the sides so that you can see see cross-sections of the teeth, which is very cool. I don’t know which herbivore this came from, though. The list of possibilities in that part of the world is pretty long. 
 

Can anyone help with the ID?

 

First photo is an oblique view. 

 

Second photo is side view where you can see cross sections of the emerged and erupting teeth. 

 

Third photo is the same thing, other side. 

 

Fourth photo is dorsal view. 

 

Fifth photo is ventral. 

 

Thanks you!

 

 

 

 

[Troodon]

Its a Maxilla of an indeterminate hadrosaur.   You can see the roots on either end view.  Pretty nice fragment and a nice DPF find

 

Lateral view

 

 

 a more complete one for comparison

[Flyfishertoo]

Great thanks @Troodon