I believe the sharper front teeth are the pinchers and rippers, the back molars are for really chewing, with big surfaces for grinding. We humans don't usually chew with our front teeth either, we bite and move the food to the rear of our mouths for chewing.
They shall grow not old as we that are left grow old:
Age shall not weary them, nor the years condemn.
At the going down of the sun and in the morning
We will remember them."
