My good friend who has seven (yep!7!!) Newfies has one guy with a similar problem. His gums are actually starting to cover his bottom teeth. She took him to a veterinary dentist for a consultation and it can be removed....so she's saving for the operation.
As a side light, she got three Newf puppies from one litter and they were playing as only 100+ lb puppies can play and one of the pups knocked the bottom canine out of another pup's mouth. She had to take him in to this same dentist to have a false tooth put in and it's stainless steel! It is hysterical!!! Talk about a scary-looking black teddy bear!
I'm sure Bear will be fine...but you might want to talk to a veterinary dentist to make sure. He's in Manhattan Beach, I think...not too far from Michael's new office.