[The possibility of stimulating mandibular growth in mandibular retrognathism with functional regulators and activators compared to a control group--a 6-year cephalometric longitudinal study].

In a teleradiological longitudinal study 86 patients with an Angle class II malocclusion were followed over a period of six years the development within the range of their facial skeleton. 43 of these patients were treated with a functional regulator according to Fränkel, 22 with an activator and 21 children remained untreated (control group). Compared with the activator-treated group, the group treated by regulators of function offered an improved development of the lower jaw.