Hi. I am a caregiver for someone who had almost the same situation as you. She lost more teeth and also had radiation. She was told to come for scans every 3 months. She already had a recurrence well before the 1 year mark so we are back in treatment now (at MD Anderson). It does sound odd to me. You should get a second opinion, I would think. Though others here have a lot more knowledge and experience. This is my first post, so I am sorry for any breach of etiquette etc.
Kristen

Just a bit more info: She had clear margins and all of her scans were clear. They just decided to biopsy something that looked questionable and it ended up being cancer.