"Kate Middleton's smile is the epitome of a natural-looking, 'imperfectly perfect' beauty," he told HELLO!. "It doesn't look overdone, overly white, or unnaturally straight; it's genuine.

"These treatments can significantly enhance a smile, making it look fresher and more vibrant ... shorter and flatter," says ...

Narrator: According to Apa, what makes a perfect smile is actually ... of temporary inserts for the client to test-drive their new look. Andrea: That is insane. Apa: Looks like big fake teeth ...