I had a filling in a cavity a year ago. Now the dentist says that it needs a root canal. It's the same dentist. Why would the filling have come out so quick? It was metal.
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No, at the time of the filling it was portrayed as a pretty basic cavity. You seem to suggest that a filling has an effective life of about a week or two. There are a lot of additional factors that I don't mention that lead me to believe that he's