I'm looking for some guidance in interpreting an x-ray.
Had a root canal re-treated last week. Tooth still hurts, seems to be getting worse rather than better. Endo keeps trying to reassure me that the tooth is just sore from the trauma of the re-treatment and will heal on its own. On the most recent x-rays, I noticed a big shadow above the root that wasn't there before the re-treatment. Is that just the maxillary sinus from a different angle, or am I looking at an abscess?
X-ray with shadow:
Comparison x-ray from a week earlier: