I had Zoom Whitening about three years ago and it cost about �300, but prices are coming down a little.
They sit you in a chair with your mouth clamped open with a plastic gum shield for protection of soft tissue, then a bleaching solution is painted onto the teeth. You then have to sit for an hour with an Ultraviolet light shone on your teeth.
They then remove the bleaching solution and teeth will be visibly whiter. The main side effect is that your teeth will be hyper sensitive for up to 48 hours after treatment and you may need to take painkillers, which I did. I also had a little burning of the gums and tongue.
Although it's effective, it shouldn't be done often as it can damage tooth enamel, making teeth porous.



