Depending on the type
of treatment needed, some dentists actually do recommend whitening your teeth
first. That way the new restorations like fillings or crowns can be matched to
the color of your existing teeth. Having teeth fixed beforehand will mean that
whitening later on will make teeth...
Zoom, and other in-office whitening techniques, uses a high percent concentration of hydrogen peroxide. Sensitivity is quite common but usually disappears by the next day. You could try doing home bleaching with custom trays and a lower percent of hydrogen peroxide. You can have your dentist...
Rinsing with hydrogen peroxide will not damage your crown or make metals rust! Follow your dentists instructions and use it as he suggests! I would not do it on a regular basis. Use an alcohol free mouth wash and brush and floss your teeth regularly to keep them free of food particles and bacteria.