Objective: Skeletal and dental changes during treatment and six months post-treatment with the headgear-Herbst appliance were evaluated quantitatively.
Methods: The sample comprised of 22 treated patients and 31 controls. Lateral cephalograms were obtained at start, after 6 months and end of active treatment, and after 6 months of retention.
Results: The restraint effect on the maxilla was significant in both initial and late phases, the enhanced growth of the mandible was significant during the initial phase only, while there was effect of reduced increase in lower facial height during the late phase only. During retention period the jaw base relationship was maintained and the effect on the lower facial height was reinforced.
Conclusion: The Headgear Herbst was effective orthopedic devise.