After I got braces (stopped wearing my retainer, rip) and then got my wisdom teeth out, I had a small gap develop between two of my molars. I think one tooth tilted a bit so at the bite surface, they were touching but towards gum, the gap was large. It would constantly fill up with food and if I didn't floss soon enough, the gun would get inflamed and bloody. Hadn't seen a dentist for several years but eventually got one. I mention the gap issue to him around November. He says "you know, we could fill that in and it shouldn't cost you a dime if we can get you on the schedule before end of year." I came in a few days before Christmas on a weekend. It seemed like everyone there was getting some sort of work done, lots of drills drilling. Never had a tooth drilled before, that was incredibly nerve-wracking but overall a physically painless experience. I definitely had been wanting something done about this gap for a while, I've been concerned about a cavity developing because of stuck food or something worse. But to my dentist, I'm guessing I looked like easy money, especially since the only thing I had to give up was my Saturday morning.