3D virtual planning has revolutionized the preoperative preparation for orthognathic surgery. Compared to traditional 2D planning methods, 3D planning offers a more precise representation of craniofacial anatomy and improved predictability of postoperative outcomes. The integration of imaging modalities such as CBCT combined with intraoral scans enables the creation of highly accurate 3D models. These models serve as the foundation for planning surgical steps, including osteotomies and repositioning of jaw segments. A significant advantage is the ability to simultaneously account for functional and esthetic parameters, such as soft tissue prediction, occlusal plane orientation, and temporomandibular joint (TMJ) positioning. Additionally, virtual planning and 3D simulation facilitate improved communication between the surgeon, the patient, and the interdisciplinary treatment team. Despite these advancements, challenges remain, particularly in the standardization of planning protocols, costs, and the precise consideration of the biomechanical aspects of the TMJ. Nevertheless, 3D planning demonstrates significant potential to improve outcome quality and patient safety in orthognathic surgery. Keywords: dysgnathia, 3D simulation, virtual planning, combined orthodontic and oral and maxillofacial surgery, interdisciplinary treatment concept