I had a dental crown put on my lower right rear molar a couple of years ago. The dentist had to regrind it a lot to get the bite right. Food constantly gets jammed between this and the adjacent tooth causing a toothache until the food is removed -- sometimes numbness and pain in my tongue and pain shooting down my throat. Now the dentist is telling me I need to have the tooth with the crown pulled, the jaw built up, and an implant. I never had any trouble with this tooth until he put this crown on. The temporary crown was fine. I think this crown was incorrectly made at the base so that there is a gap which allows food to get between those teeth, and all the grinding to get it to fit made the top fit OK, but left the alignment next to the adjacent tooth bad. Since it doesn't ache except when there is food jammed there shouldn't a new crown fix this? I just had dental surgery on another tooth because of a recurring abcess resulting from a root canal that evidently did not go well. I gather that's not an uncommon thing, but the bills add up. Any advice appreciated.