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ORTHO TRIBUNE | MARcH SUpplEMENT Trends 5 the jaw angle and thus a posterior rotation of the horizontal mandibu- lar ramus. Through the rotation, the menton was shifted caudally so that the skel- etal situation and the soft-tissue pro- file of the lower face were improved in the vertical axis. Accordingly, the interbase angle was enlarged while AD Fig. 4a: The cephalometric image shows the disharmonious skeletal arrangement in the vertical axis. The lower face shows a deficit of 10 percent in relation to the upper face. The mandibular angle and the inter- base angle are small. Fig. 4b: Disharmonious soft-tissue arrangement in the vertical axis: The lower face shows a deficit of 8 percent in relation to the upper face. Likewise, there is a disharmony in the division of the lower face. Fig. 5a: Simulation of a preliminary surgical translocation: An opening of the jaw angles is followed by the rotation of the mandibular segment during operation. The vertical blue line touches the pogonion of the ini- tial situation: slight ventral shifting of the prominence of the chin. The anterior mandible glides along the palatinal surfaces of the anterior maxilla (green line), which causes a posterior rotation (white arrow) and a vertical change (blue quadrangle). Fig. 5b: Simulation of a preliminary surgical mandibular translocation: The correction in the sagittal disharmony was accomplished without changing the vertical ratio. The vertical blue lines touch the pogonion of the initial position: clear ventral shifting of the prominence of the chin. Figs. 6a–c: Occlusion at the end of treatment: There is a neutral stable occlusion with physiological overjet in the sag- ittal axis and vertical axis, as well as a correct midline. the ratio between the posterior and anterior facial height was reduced (Fig. 5a). A translation of the dentigerous segment led to the correction of the sagittal dysgnathia without the improvement of the vertical axis. In addition, the translation resulted in an enhancement of the prominent chin, which led to a flattened mouth profile and thus to a maturation of the patient’s appearance (Fig. 5b). Therapeutic procedure The correction of the dysgnathia was done in six phases: g OT page 7 (All photos: Provided by Prof. Nezar Watted)