The faulty jaw can be either congenital or developmental in nature, or from a traumatic injury.
Faulty jaw is another word for malposition of the jaw or jaws.
In general it is felt that orthodontic therapy is not specifically related to damage or problems with the jaw. Like all joint problems, the causes are multifactorial and some people believe malposition of the jaw is one of these causes. Bruxism or grinding teeth at night or during the day for that matter can be associated with malposition of the jaw. Occasionally when the teeth do not meet correctly, it can facilitate or encourage grinding of the teeth. I was in an accident and broke my jaw.