One of my molars feel funny when brushed with an Electronic
toothbrush.  It's the same kind of feeling I get in the morning
when I eat something sweet the night before and forget to brush
my teeth.  I don't feel it when brushed with a regular brush.

This has went on for years.  Two years ago, I did an x-ray and
the dentist said she saw nothing wrong.  So now it hasn't been
checked for two years.  Should I see a dentist again or get
another x-ray?

But why do I feel that on this molar?  Will the molar eventually
go bad?

Thanks.