Many possibilities: If your tooth was not sensitive before the filling and has been sensitive since the filling, there could be a problem with the filling which should be rechecked by your dentist. If the cavity was deep the pulp or nerve may be irritated. This may lead to a root canal if the condition worsens. Either way after 4-5 months this should be rechecked by your dentist.
Answered 6/6/2014
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