Thanks for all the replies. I saw an endodontist today who was very concerned that formocresol was used. Shocked actually and he called the dentist's office to confirm.
He told me to see an neurologist and a ENT guy about it.
I asked if it woudl help to remove the tooth and he said he didn't know. I had an appointment for friday for the oral surgeon but this has been getting noticibly worse every single day so I talked to my family dentist (who really is a good guy and does NOT use formocresol) and he agreed to extract the tooth tonight.
We talked at length about what an oral surgeon would do differntly and he said "not much in an extraction like this". I went ahead and did it. The anesthetic took the burning away and the extraction was minimally painful except for a couple of twinges.
Once the anesthetic came out the burning returned, a little worse but I would expect the nerves to be a little upset. No pain in the tooth, just a slight ache.
THe tooth did smell faintly of formocresol, the dentist agreed. He scraped the area quite thoroughly and took an xray to double check for material left behind which he then loctated and removed.
Damaged by Sargenti, my burning and pain initially was in my cheek but then spread to my lip, temple, eyebrow and forehead. Though never at the same time, in fact, it would shift rapidly between one another. I guess I'm hoping that because the onset was slow and intermittent that maybe the damage isn't permanent or at least no worse than it is now. I think it was the vapours, because if it was from the overfill (very small) of gutta percha wouldn't I have had pain and symptoms right thru and not have gotten better?
I'm very sensitive to chemicals and exposure tends to make my face burn. I can't even paint with latex or use certain cleaning products unless I'm wearing a mask. I'm hoping that removing the chemical stops the symptoms. Does that sound at all reasonable or am I grasping at straws here?
I've never heard or read of anyone with this type of injury from formocresol, just from sargenti though it stands to reason it could happen.
My dentist irrigated the tooth very thoroughly before finishing the root canal for that very reason (Though there was no way to get it out of the dentin tubules)
As I type the burning is less than it was initially and the pain is minor to none. (after 600mg of ibuprofen).
I am still keeping my appointment with the oral surgeon on friday to discuss my case and see if there is anything more that could be done. As well, my dentist said "off the record" it would be good to have documentation from a surgeon and endodontist if this ever goes to court. (It was not him who used the stuff, it was an emergency done on Christmas eve by a different dentist).