I have some serious gum loss and tooth Abrasion or Erosion (really don't know the difference) on my lower side teeth and a couple back molars. I think it is from clenching my teeth at night (I wear a mouth guard at night) but doesn't seem to help. My dentist wants to fill the deep pits but I'm wondering if I shouldn't have the gums repaired since there is so much gum loss. I don't even know if that is possible since the pits are pretty deep. I read once that once a filling is put in right above the gum line then the gum can not be repaired because the grafted gum tissue can not adhere to a filling. Is this right? but is gum surgery possible since the pits are so deep? I don't know what to do. Any advice?