2004-4-29 2004-4-10 It's actually a bleaching process that reverses discolorations of enamel (the outside layer of tooth structure). The system uses a mild solution retained in a custom fitted appliance that slips over your teeth. 298820 text/html 1.0 EN index,follow tooth whitening bleaching enamel tooth teeth whiter brighter smile tooth discoloration dentist whitening system family dentistry Nelson Family Dentistry - Tooth Whitening text