Teeth whitening can last up to a period of 6-9 months but differs in every person. Teeth whitening can last longer if beverages, smoking and food that stain the teeth can be avoided to discourage disclouration of the teeth. Oral hygiene must be adhered to if one wants to keep his/her teeth white and shiny along with teeth whitening procedures, gargling or rinsing with peroxide after every meal and brushing with teeth whitening toothpaste.
Hydrogen peroxide can be used for whitening or bleaching the teeth but should be used under the supervision of the dentist for correct application. Though not as strong as hydrogen peroxide, carbamide peroxide can also be used for bleaching the teeth with longer shelf-life and is ideal for do-it-yourself or as a DIY method. People with cracked teeth and teeth that have bad formation can undergo cosmetic procedures that can whiten the teeth such as veneers, crowns, bonding and people with tetracycline-stained teeth can use the latest deep bleaching procedure.