Q: My teeth are yellow. I have heard about teeth whiteners which when put overnight make your teeth white. I want to know if they really work and whether or not they are safe for the body. Also, could please prescribe any of them which is easily available at the local chemist.

A:Extrinsic (Superficial) staining or discoloration due to varied reasons can be easily managed by tooth whitening procedure spread over multiple appointments depending on the status of the condition and method employed. Do it yourself -products do not work and can create some problems. I suggest you get in touch with an experienced dentist who will examine you and perform this procedure at office and/or supported by a at home bleach in a specially made tray on impression model of your teeth. The procedure is simple but requires time and would not bring about whitening overnight.