I have a hole in the backside of my right incisor. Is filling it possible or would a crown be necessary? (Photo)

Yes...Much food coloring in those packaged dinners..The temp is made of plastic and is more porous...Staining can happen.

Sorry to hear that. If you had a root canal and you are sensitive in the same area to heat and sweet, it is not that tooth, most probably it is another tooth! If proper root canal is done and you have had a crown, there should be no temperature sensitivity! Also a cracked tooth can cause pain...

Sorry to hear that! If you were satisfied with your bite before, Try to get your study models so you can go to an expert dentist, for full mouth evaluation , diagnosis and treatment planning! If nobody does have the original models prior to your problems, then the good dentist will probably take...