My horses all have their teeth checked annually. They usually don't need it until they are three, and usually have their bit seat done and wolf teeth pulled if needed, as I do drive. Otherwise, those sharp points need to be taken off annually, it helps keep weight on easier (stretches dollars you spend on feed) and I sure wouldn't want ulcers in MY mouth. My vet says SO many people don't float teeth... out of sight out of mind.
As for deworming, I do like the daily dewormers. On top of that I rotate between Pyrantel pamoate and Ivermectin for the most part, every eight weeks. My horses are stalled, not on pasture, so I don't feel like I've got to worm above and beyond that. I do find the daily dewormers keep the pot bellies down.
Andrea