Teeth Whitening

1. Celeb Anti Ageing Tip - Cosmetic Dentistry !

Behind the gleaming smiles of some of our favourite British celebrities lies a secret.

Rather than splashing out on face lifts, boob jobs or stomach tucks, stars including actress Martine McCutcheon, newsreader Kirsty Young and designer Amanda Wakeley, have opted for something far more simple - the perfect smile.

Cosmetic dentistry is all the rage in America where it's a sin to have bad teeth. And here in Britain we're catching on fast.

The choice of treatments is huge. There are veneers, bridges, crowns and white fillings to choose from. There are even computerised smile analyses which look at the relationship between lips, gums and teeth.

Here, we round up six types of cosmetic dentistry and explain what each treatment does, how long it takes and how much it costs and tell you which UK stars have opted for these treatments

1. Teeth whitening

What's it for?: Yellow teeth. Losing the colour of your teeth is part of the ageing process. Teeth start to change colour from teenage years. Genetics also play a part in white teeth. If your parents have yellow teeth, you are more likely to follow suit. Whitening is for people who suffer from teeth stained by food, drink - mainly red wine, coffee and tea - and tobacco - without harming their teeth.

Stars who have opted for this treatment are too many to mention but the list includes Mylee Cyrus, Pricess Kate, Kylie Minogue, Robbie Wiliams, Rihanna

Teeth Whitening

There are three types of teeth whitening techniques to choose from:

• Pure laser technique:

A quick fix way to whiten teeth.

How it works: Laser beams - or the more updated light emitting wavelengths - provide an intense light which activate a whitening agent made from carbamide peroxide or hydrogen paroxide pasted onto the enamel of the tooth. This chemical reaction lifts the stain out of the enamel, and is then washed away by the dentist.

How long does it take?: About one-and-a-half hours.

How long does it last?: Needs topping up once every three to six months.

Cost: From around £600-£800 a session

• Kick start laser

How it works: A mould of the teeth is taken and a mouth guard made to exact specifications. The patient wears the mouthguard filled with a whitening gel made from carbamide peroxide or hydrogen peroxide. Laser beams, or a light emitting wavelengths, activates the gel pasted onto the enamel of the tooth.

How long does it take?: Two appointments, two weeks apart.

How long does it last?: Three to six months.

Cost: From around £500 a session.

• Home kit

How it works: The patient is fitted with a tailor-made mouth guard. Instead of a laser, the patient wears the mouthguard filled with whitening gel which is worn each night for around three weeks. This does not harm the teeth but slightly changes the composition of the dentine - the part of a tooth that is hard, contains calcium and lies underneath the enamel - making it appear whiter.

How long does it take?: Two to three weeks.

How long does it last?: Between three and six months.

Cost: From around £500.