I have a crown on top upper left jaw which is going rotten. I have no other teeth either side and I am told I have hardly any bone surrounding the missing teeth area. Can I still have implants even though there is hardly any bone in that area because my dentist told me that he could take that crown out but surely I would be left with sagging cheeks. I cannot have a bridge because I do not like the impressions as they make me gag and to fill a missing tooth on the other side of my mouth he said would be an option but would an implant be better depending on the cost of course. Thanks