in my experience dentists don't know fuck all about anything
... I've NEVER been to a dentist I'm happy with.
if I were you I'd find your nearest University dental school... and if it's not too far away get them to have a look at you and see what they can do.
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Prof UnderCover evitable,
Mon 13 Oct 2008, 15:14,
archived)
don't worry the nerves are dead in that tooth anyway
at least now that part of my tooth isn't digging into the top of my top set of teeth
(i have horrible teeth as seen here :

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SkUG >_O i got a couple of stitches in my eyeball... ow,
Mon 13 Oct 2008, 15:19,
archived)