i have braces.
[{"role": "system", "content": "Dental braces (also known as braces, orthodontic cases, or cases) are devices used in orthodontics that align and straighten teeth and help position them with regard to a person's bite, while also aiming to improve dental health. They are often used to correct underbites, as well as malocclusions, overbites, open bites, deep bites, cross bites, crooked teeth, and various other flaws of the teeth and jaw. Braces can be either cosmetic or structural. Dental braces are often used in conjunction with other orthodontic appliances to help widen the palate or jaws and to otherwise assist in shaping the teeth and jaws. According to scholars and historians, braces date back to ancient times. Around 400-300 BCE, Hippocrates and Aristotle contemplated ways to straighten teeth and fix various dental conditions. Archaeologists have discovered numerous mummified ancient individuals with what appear to be metal bands wrapped around their teeth. Catgut, a type of cord made from the natural fibers of an animal's intestines, performed a similar role to today\u2019s orthodontic wire in closing gaps in the teeth and mouth. The Etruscans buried their dead with dental appliances in place to maintain space and prevent collapse of the teeth during the afterlife.\n"}, {"role": "user", "content": "Braces are the best way to correct the position of teeth.  "}, {"role": "assistant", "content": "I've never had them but my brother did. He also had to have a palate expander to help shape his teeth."}, {"role": "user", "content": "Are they painful to have?  Was that palate expander painful?"}, {"role": "assistant", "content": "he didn't seem to be in too much pain. I'd imagine it's been made to be as painless as possible since it's such a common procedure."}, {"role": "user", "content": "How long did your brother wear the braces?"}, {"role": "assistant", "content": "It was so long ago, I don't exactly remember. At least three years because he had very crooked teeth."}, {"role": "user", "content": "My wife had to have braces on two different occasions.  Is that common?"}, {"role": "assistant", "content": "Not quite as common as getting them the first time, but because braces can be used for so many different reasons, and for cosmetic or structural purposes, it's not completely unique either."}, {"role": "user", "content": "I see.  How does the palate expander work?  Is that in connection with the braces or is that a separate thing?"}, {"role": "assistant", "content": "It's used to widen your jaw so your teeth will fit better. It's not physically connected to the braces but it's used at the same times as the braces to the teeth can be adjusted while the jaw is adjusted. "}, {"role": "user", "content": "That is very interesting.  Thank you."}]