I've had a few crowns before, and all sensitivity went away within a few weeks. Not this one (tooth #31). It's been a month and half, and it still feels like I'm being drilled without Novocaine when cold liquid touches it, and the pain lingers for few minutes afterwards. It also hurts to eat anything hard or semi-hard on it. Went back to the dentist to have it x-rayed and examined. X-ray looks normal, but based on my description of the pain, the dentist has diagnosed me with irreversible pulpitis, which means a root canal and another $1100. Fun times. Better than dealing with this pain or losing the tooth by leaving it untreated, though.