The initial dentist took an x-ray, placed the crown
back on, and proceeded to inform me that the bump was a sign of infection under
the molar in between the two root areas you typically see on a molar x-ray, though the infection did not show up in an x-ray.
Since he wasn't my primary dentist, and was rushing very fast that day, I decided to consult with my primary dentist for a second opinion. Again, I received an x-ray, and then he examined me.