Recently, the number of patients with severe jaw deformation who undergo treatment has been increasing in the orthodontic field since the start of health insurance coverage of the treatment of such disorders. In this study, to prevent the induction of functional problems in the mandibular joint and to improve mandibular deformity, we used different osteotomy methods in the left and right mandibular ramus, i.e., intraoral vertical ramus osteotomy in the left side and sagittal splitting ramus

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... otomy in the right side. Improvement of mandibular protrusion and normal occlusion were obtained by surgical orthodontic treatment, but the mandibular asymmetry could not be improved. From experience of the reconstruction of malocclusion in jaw deformity, development of the following methods was considered necessary based on problems in orthodontic treatment and future prospects: 1. Diagnostic method by highly accurate and high-dimensional imaging, 2. Biomechanical analysis and a simulation method in each patient, 3. Genetic diagnosis method, 4. Development and improvement of orthodontic devices for the efficient movement of teeth.