I need to go to a dentist, "Orthodontics" is derived from the Greek "orthos" ("correct", "straight") 
Oh ok like to straighten teeth?
Exactly, in fact it has a history over 2000 years old
I had no idea it went that far back what else can you tell me?
Well it has origins as a part of medicine
Oh ok so just like Dr.'s
Yup! In fact I have heard archaeologists have discovered mummified ancients with metal bands wrapped around individual teeth
That is crazy to imagine!
the teeth and the way the upper and lower teeth fit together. The prevalence of malocclusion varies, but using orthodontic treatment indices, which categorize malocclusions in terms of severity, it can be said that nearly 30% of the population present with malocclusions severe enough to benefit from orthodontic treatment.
Orthodontic treatment can focus on dental displacement only, or deal with the control and modification of facial growth. In the latter case it is better defined as "dentofacial orthopedics". In severe malocclusions that can be a part of craniofacial
Orthodontics
Etymology.
"Orthodontics" is derived from the Greek "orthos" ("correct", "straight") and "-odont" ("tooth").
History.
The history of orthodontics has been intimately linked with the history of dentistry for more than 2,000 years. Dentistry had its origins as a part of medicine. According to the American Association of Orthodontists, archaeologists have discovered mummified ancients with metal bands wrapped around individual teeth.
Malocclusion is not a disease, but abnormal alignment of