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Figure 8 | Head & Face Medicine

Figure 8

From: The University Münster model surgery system for Orthognathic surgery. Part I – The idea behind

Figure 8

Axis Orbital Marker Lines System (AO-MLS). The reference plane is based on the Axis Orbital Plane (AOE). Construction: Rotation of the Frankfort Plane caudally by 7° around the orbital landmark. Left: Marker lines of the maxilla. -ML1 from the incisal landmark of the upper central incisor perpendicular to ML2. -ML 2 approx. 5 mm above the mesial apex landmark of the upper first molar, parallel to the Axis Orbital Plane (first construction step). -ML3 from the buccal fissure (alternatively buccal mesial cusp) of the first upper molar perpendicular to ML2. Right: Marker lines of the mandible. -ML4 from the lower central incisor edge perpendicular to ML5. -ML 5 approx. 5 mm below the apex of the lower central incisor, parallel to the Axis Orbital Plane (first construction step). -ML 6 from the buccal fissure (alternatively buccal mesial cusp) of the first lower molar perpendicular to ML5. -ML 7 from the anterior margin of the ramus perpendicular to ML 5. -ML 8 above the Lingula mandibulae, parallel to the axis-orbital plane. The small boxes show the duplication of the planes and of the maxillary and mandibulary structures as a template for the displacement according to vertical and sagittal targets for the surgical planning.

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