After getting X-rays on the boy's mouth, doctors discovered a sac in his lower jaw that was filled with "abnormal teeth" Joelle Goldstein is a Senior News Editor on the TV team for PEOPLE Digital.

This is 10 more teeth than an adult human. Dogs have 20 teeth in their maxilla (upper jaw) and 22 teeth in their mandible (lower jaw). Dogs have 12 incisors, 6 on the top and 6 on the bottom ...

The condition is often only detected when seeking treatment for symptoms like headaches, facial or jaw pain ... designed to fit either upper or lower teeth. Which one to buy largely depends ...