Check out this link. http://www.thecatsite.com/Care/14/Br...ats-Teeth.html
It's under Cat Care at the top of the page on TCS.
I also saw a video shortly after I joined TCS, but don't remember where.
If I find it, I'll let you know.
I got a kit at PetCo or PetSmart with cat toothpaste, a little toothbrush, and a finger brush. The finger brush looks kind of like a large thimble with soft plastic bristles on one side. I started out by putting a dab of the toothpaste on the finger thing and letting the cats lick it off. As they got used to it, I was able to brush a couple of teeth at a time. I prefer the finger brush because I feel like I have more control over the cats. They don't back away from it and jerk their heads around the way they do with the regular toothbrush. I do occasional find the finger brush on the floor. Apparently my girls think it's a new kitty toy.
I've seen different opinions on how often to brush. At least one article said daily, but other have said 2-3 times a week.