Why did my tooth turn gray after maxillary expansion surgery?

Hello doctor,

I had maxillary expansion surgery about one month and ten days ago. About a week later, I began expanding my jaw using a Hyrax appliance, turning it twice a day in the evening for two weeks.

Approximately two weeks later, I noticed that one of my front teeth had turned gray. I noticed it late, so it could have happened earlier. When I visited the dentist, they took an X-ray specifically of this tooth. The X-ray showed something unusual, as if the root was being deteriorated from the outside toward the inside.

During the cold test, there was no response from this tooth. However, the other front teeth also did not respond well, possibly because I currently have braces on only those six teeth.

The following day, when I ate ice cream, I actually felt the cold sensation. I have now been referred to an endodontist, but the first appointment, which does not include treatment, may take at least two weeks.

I also attempted to contact the surgeon, but the hospital claimed it is not their responsibility, even though the issue appeared after my surgery. At this point, I am unsure of what to do and worry that waiting might lead to losing the tooth. I have the X-ray and can send it if needed.

Please guide me.