Fig. 4
From: The University Münster model surgery system for orthognathic surgery - The digital update
Left: Frontal image of the patient, gazing forward with mouth open and cheek retractors in place. The head must be tilted forward or backward so that the aligned teeth are in one plane. A line parallel to the interpupillary line is drawn to assess the maxillary occlusal plane. Right: The upper jaw is aligned to Meshmixer’s ground-plane grid according to the reference lines of the frontal image. The dental midline is slightly shifted to the right of the mid-sagittal plane (red dot)