In this study 10 Angle class 11 / 1 cases who didnot complete their maximal pubertal development, with retrognathic mandible and deep bite were treated with the Herbst appliance. Together with significant dental, skeletal and soft tissue changes, Angle class 1 occlusion was achieved. Normal function and esthetic appearence were established. Lateral radiographies of pretreatment, post-treatment and retention periods were evaluated. Skeletal and dental factors contributing to the establishment of class 1 occlusion were determined.

Keywords: Retrognathic Mandible, Herbst