Bleaching is process of lightening and brightening color of teeth. We use bleaching materials that is apporeved by WHO . There are two types of bleaching these are home and office ones. At our clinic , we use mostly office bleaching for quick result . If patient has sensitive teeth we recommend home bleaching with custom bleaching tray .. result is so dramatic at grayish and yellow teeth . We could get results from two to seven shades. And these shades may be reached after single practice on teeth in office bleaching . Sometimes may take longer depends on teeth . The Effects of bleaching lasts for years that depending on patient’s lifestyle and habits.