A friend who had a kitten who had a bad time teething (drooling etc) used these
Petstages Catnip Play Links - £2.50 : Pinky Pawz - Simply ... the cats whiskers!, Pinky Pawz - Simply ... the cats whiskers!
She would put them in the freezer for a little bit and then give them to the kitten who would chewplay with them for a while - it
seemed to help. My 11 year old cat, as a kitten, had the most horrendous time teething and the vet did give us something to help but I can't remember what it was. If your vet was concerned I am sure they would have recommended something.