Orthodontia means the practice of improving the alignment and position of teeth. It involves using braces, retainers, and other devices to straighten crooked teeth and fix problems with the jaw. Full definition
That applies to expensive medical procedures and prescriptions, as well as other costs such as orthodontia for your children. (cnbc.com)
For example, if a child needs orthodontia and one parent with joint legal custody does not agree that the expense is necessary, the child can not have her teeth aligned without the approval of the court. (info.legalzoom.com)
This can easily lead to an overbite that might later need to be corrected with orthodontia such as braces. (webmd.com)