Yes, I saw that white spot myself, of course had no idea what is it. It's more likely it's rc material, I didn't have filling in that tooth before root canal and no filling in other close by teeth. And I had on and off pain in this tooth since the root canal was done. But I had a sinus ct scan already many years ago because of this tooth ( after the root canal ) and back then they said the ct scan looked ok, just like this time. I can try to get the x ray before the root canal, it's a different general dentist we had back then, but what if that x ray is not digital ? The OS didn't ask me for sinus perf check, he didn't tell me anything before or after the extraction, except that the tooth may break during the extraction bc it was root canaled, and after he said you don't need another appintment, you're fine. Not that the OS didn't inform me about this white spot, the general dentist never said anything about that either, not even when I was at her office specially to look at this tooth couple of years ago when my ear was hurting me ( on that side ) and the ENT dr ( not this one I saw now ) didn't know the reason for my earache.