When a glider has a facial abscess, it is impossible to tell if there is any tooth root involvement just by looking at it. Why does this matter? Because infections of the TOOTH root involve a different treatment than infections of the soft tissue of the face.
A tooth might have to be extracted, or a gel pack inserted, in order to eliminate a tooth root abscess. So, it is NECESSARY to know if the teeth are involved when you have a facial abscess.
X-rays are necessary for determining if the tooth root is involved. Without x-rays, you are just guessing at the cause of a facial abscess.