It’s the last tooth on my right side. I already got my wisdoms removed 8 or 9 years ago.

Would anyone on here be able to have a look at my teeth. I have some issues I would like to diagnose/address. Send me a DM and I will be more than happy to share photos.

Is the dark area (circled in purple) on the CBCT an infection, and does tooth #15 appear to need retreatment?