A lot of work produced Kate's sunny smile

LONDON, Nov. 26 (UPI) -- A French dental surgeon used cutting-edge techniques to engineer the dazzling smile of Britain's Kate Middleton, one of the doctor's colleagues said.

Bernard Touati told Britain's The Daily Telegraph his close friend, Didier Fillion, used a series of so-called micro-rotations on Middleton's teeth to create a set of pearly whites that don't look as worked-on a standard aesthetic dentistry.

"They aren't absolutely aligned," Touati said. "In the United States they want teeth that are symmetrical, monochromatic, artificial."

Middleton's final look wowed celebrity observers and royals watchers. While straight and white for the most part, her teeth also had a more-natural look known in dentistry as "harmonious asymmetry."

The Telegraph said the technique basically involves low-profile braces on the back of the teeth and a sophisticated software program that maps out the final appearance and allows tiny adjustments that move the teeth into exactly the right position.

"He did some little micro-rotations on Kate Middleton so that it looks like a natural, healthy smile, but not artificial," Touati explained.

The London-based Fillion refused to confirm his royal masterpiece; however, he told the Telegraph that in general his procedure eliminates the "piano key" look that too many conventional aesthetic treatments produce.