Why Is Fluoride Good for Teeth?

If our teeth are made mostly of calcium, why do we use fluoride to keep them healthy? Quick Questions explains why, and how we finally figured it out. Hosted by: Michael Aranda ---------- Like SciShow? Want to help support us, and also get things to put on your walls, cover your torso and hold your liquids? Check out our awesome products over at DFTBA Records: Or help support us by becoming our patron on Patreon: ---------- Looking for SciShow elsewhere on the internet? Facebook: Twitter: Tumblr: Instagram: Sources: