The invention relates to an orthodontic apparatus that includes an upper jaw brace and a lower jaw brace. The braces each have an adjustment mechanism for an engaging part. The engaging parts engage together when the mouth is closed. Each adjustment mechanism has an adjustment spindle running in the sagittal direction of the jaw brace, the spindle head thereof can be accessed at the front by a tool. The position of the engaging part can thereby be adjusted very easily, and, among other things, also while the orthodontic apparatus is in the mouth of the patient.
