Dentists: how did braces improve the world?

Orthodontics: Orthodontic treatment improves patient's dental health and self esteem. People spend more time enjoying their lives, are more productive and spend more time with family and friends rather than making appointments, waiting in dental offices and wasting money and time in dental offices. I hope this helps answer your question.

Much more attractive: In todays superficial world, braces helps facial esthetics from very minor improvements to life altering improvements of some obvious deformities.

Better health: Put teeth and jaws where they belong they function better, undergo less wear, are easier to care for, and have longer life-span. As a coincidental result, when teeth and jaws properly positioned, they also look better, enhancing self esteem. Please know the easier teeth are to maintain, the less materials and energy expended in their maintenance, an ecologic benefit.