How to whiten your teeth

British people used to be renowned for having bad teeth. Over the years though we’ve upped our game. A study in 2015 found that we now take better care of our teeth than Americans and we have much lower rates of tooth decay. That said, most of us would like slightly whiter teeth. It’s a fine line between naturally white and glow-in-the-dark Hollywood brightness though. We asked the experts what their tips were for striking the balance and improving the look our teeth...
What causes yellowing?

There are two main reasons why teeth start to yellow, extrinsic and intrinsic. The former is when the outer layer of your tooth (the enamel) is stained by drinking coffee, wine and cola or smoking. This can also accelerate enamel erosion and not only cause yellowing, but sensitivity too.
“Intrinsic yellowing is when the inner structure of the tooth (the dentin) darkens or gets a yellow tint,” explains cosmetic dentist Dr Rhona Eskander. “This can be caused by too much exposure to fluoride as a child, if you had tetracycline antibiotics under the age of eight years or if you had trauma to the affected tooth.”
It goes without saying that as we age our teeth begin to yellow as the combination of extrinsic and intrinsic yellowing take hold and become more visible.....................