Bandit had FORLs and needed nearly all of his teeth pulled over a period of about 2 years (he currently has just his lower canines left). I don't want to alarm you because many diabetic cats pull through the dental just fine, but the dental where they pulled the last of his teeth did knock him out of remission (he had an inflamed nerve), and he needed insulin for a short time. I think it was about 6 weeks--but he did come out of it and go into remission a second time, so as long as you're on top of treating any high BG with insulin as needed, he should be fine. The faster you get on top of high BG and treat it, the more likely he'll get to remission again. That's just if you have issues--like I said, it doesn't happen to every cat.