I had a crown put on my tooth due to it having a very large filling, that the dentist was worried about cracking. No problems whatsoever with this tooth or any surrounding teeth. This tooth is the third from wisdom tooth on the bottom, if it matters. Anyway, this was done in march and I am still having problems with it. It is not very close to the gumline and I taste metal all day. Also, whenever I drink or eat anything cold, I feel a popping sensation that seems to come from inside the crown/tooth. In addition to all that, it feels too tall. I have returned to the dentist that put it on and she told me that it's "not that crown, but the tooth in front of it that's bothering me" Also, she said it could not be because it"fits perfectly" I don't trust this dentist at this point, not only because of this, but also, because her past work has been a little sloppy and I question her cleanliness practices--she does not wear a mask and does not wash in between patients. Is that considered normal? Please give me some advice as to what is really going on with my crown and what I should do, and is her lack of mask and handwashing(she does change gloves) put me at risk for anything?