Botulinum toxin is sometimes used to treat severe tooth grinding in humans.
You could try that on the dog. Even if it doesn't work, it'll sort out her wrinkles and crows' feet and take 10 dog years off her age!
( MooCow_Byter, Tue 12 May 2009, 7:58, archived)

She is 8years old
A dog that looks -2 is something I would rather not look at, but if it stops her teethgrinding I'll inject her with things I find in the bin if you reckon it might help.
( Shlvng, Tue 12 May 2009, 8:05, archived)