Two weeks ago I had a permanent crown placed on a lower molar following a root canal procedure done six months prior. Since the permanent crown was placed, I began to experience pain in the tooth which I did not have with my temporary crown. At any given moment, the tooth could be relatively pain free with only some biting discomfort to severe pain during and after chewing on the affected side. These symptoms are not consistent and change hour by hour. For example, applying direct force to the top of the crown with my finger may or may not produce pain depending on what
i would suspect that either the bite is "high" and needs to be adjusted, or perhaps taken out of occlusion entirely (although just ever so slightly) or your tooth may have a fracture/crack. cracks occur in root canal teeth much more frequently than vital teeth because they become brittle due to removing the nerve and hence the blood supply from the tooth. The tooth may have been cracked for a while (perhaps even before the root canal was done) and only now are you feeling it because you are able to put pressure on it since your crown was designed to come into contact with the opposing tooth. Many times, cracks are not visible on x-rays, and manifest themselves only with pain upon biting or pressure. later on, an abcess may appear on a film--sometimes months and months later......
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