I had a dental implant where my front tooth was in 1999. In 2003 I started Fosamax. Recently I had the sensation of movement in the tooth, and the dentist found an infection. Antibiotics and a laser treatment by the periodontist did not clear it up; when he opened it up, he found bone loss around the implant. After he removed infected bone he replaced it with about 1/4 tsp of synthetic bone. An associate of his had a patient on Fosamax who had lost so much bone around her 2 implants she was referred to an oral surgeon. He says there is no way to prove I lost this bone because of Fosamax, but it is completely unlike the bone loss in the rest of my mouth, which was caused by loose teeth, in my opinion.