Abstract: Functional regulating device for adjusting a bite of a jaw having an upper row of teeth and a lower row of teeth is provided. The functional regulating device includes a lower jaw splint constructed and arranged to fit onto the lower row of teeth and be detachable therefrom; an anchor constructed and arranged to attach to the upper row of teeth and be detachable therefrom; and first and second opposed adjustable length connector bars. Each connector bar has a first end and a second end and a predetermined fixed length and non-telescoping action when inserted into a jaw. The first ends of the connector bars are permanently connectable to the lower jaw splint, and the second ends of the connector bars are permanently connectable to the anchor. Additionally provided is a method for treating malocclusion in a patient.