How do braces work? Braces have a lot of little gadgets. They are very important because they make your smile pretty. They straighten your teeth. Braces have four basic parts. There are brackets, arch wire,metal bands, and o-bands. The metal bands go on the back teeth. The brackets are little things that you glue on your teeth. The arch wire go’s next. It go’s over the brackets to hold your teeth in the way the wire is. Then the o-bands go on. They hold everything together because it go’s over the wire so it holds it.That’s how braces work from my research. I also have braces 🙂