Like any other cosmetic procedure, cosmetic dental treatments also have limited life span yet may have long-term consequences. Teeth that have been bleached do not stay white forever. You may have to come back to your dentist for future treatments but the decision to do so is your prerogative. Good thing that this procedure does not involve structural changes so it becomes optional. On the other hand, having veneers or dental crowns also means regular veneering or dental crown replacement when the originals break or deteriorate. This also applies to dental bonding. It is best to always ask your dentist about long term maintenance.