Duchess of Cambridge's dazzling smile is courtesy of a new procedure used by a French dentist who specialises in making teeth look not-so perfect

The secret to Kate Middleton's perfect smile is out -- and it's all to do with its gleaming imperfection.

Her pearly whites have long been the talk of the US and Canada but no-one knew exactly how the Duchess of Cambridge perfected her stunning smile.

Crowning glory: A natural look by micro rotations is the secret behind
Kate's pearly whites and the entire procedure takes about six weeks to
two years. File pic

It has now been revealed Kate picked a French dentistry expert whose speciality is creating an imperfect look to mould her mouth into shape.

Didier Fillion is a pioneering dentist who doesn't just whiten and straighten teeth but does what he calls 'micro-rotations'.

And according to Dr Fillion's friend and fellow dentist, Bernard Touati, it is this imperfection which makes Kate's smile so endearing.

He said, "You know why they look so good? Because they are not absolutely aligned. The problem in the US is they have a very artificial vision. He did some little micro-rotations on Kate Middleton [to produce] something which is natural. That is what we like; a natural healthy smile, but not artificial."

Dr Fillion's speciality is that he attaches invisible braces to the backs of teeth.

But the dentist said micro-rotation can be achieved quickly by grinding and polishing existing tooth enamel or by adding porcelain veneers.

Dr Fillion said creating the perfect smile can take from six months to two years and will set you back between �4,000 and �11,000 (Rs  3.25 to 8.90 lakh).

The dentist refuses to confirm or deny the Duchess was a patient.

He said: "We have the software � so if you say, 'I don't like this tooth, can you change it?', I can change it."

Housing colony in Kate's honour
A new housing development in a British town has been named "Catherine Place" in honour of Kate Middleton. The housing colony in Kate's home town of Bucklebury boasts of "six fine homes" priced between �3,15,000 to �8,75,000 pounds. The Developers said they "could not resist paying homage" to the hometown woman who wed into the royal family.

Rs 9 Lakh
The cost of the procedure in order to get a smile as perfect as Kate's