This practitioner is a dentist who has taken postgraduate work in the straightening of teeth.

这类执业者是一种牙医，专业是研究牙齿矫正。

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Straightening children's crooked teeth with braces may improve their smile but it is no guarantee of happiness and improved self esteem.

用牙套来矫正孩子们不够整齐的牙齿，也许可以让他们的笑容更加灿烂，但不一定能使他们更加快乐、更具自豪感。

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Dental experts recommend for the United States who need straightening teeth with braces cosmetic dental centers in the formal, only to ensure the safety of orthodontics and corrective dental effects.

口腔专家建议求美者，带牙套矫正牙齿需在正规口腔美容中心进行，方可保证牙齿矫正的安全性以及矫正牙齿效果。

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Many parents don't think twice about straightening their kids' crooked teeth but stop short of fixing a crooked nose, and yet, in just the past seven years, plastic surgery performed on teens has doubled.

CNN: ASIANOW - TIME Asia | Brainteaser