Teeth whitening is a great choice for good-looking and healthy teeth. There are two methods: the traditional one and the laser teeth whitening. The traditional method or the ones done at home consist in applying whitening gel on a silicone tray, which is placed over the teeth. It can be done during the day or night. In-office bleaching uses high-concentration gel along with light systems (halogen light, plasma, LED, argon, among others), bringing immediate results.