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Table 2 Description of the planes

From: Changes in facial width according to the ostectomy level of the proximal bone segment in intraoral vertical ramus osteotomy for mandibular prognathism

 

Name

Description

Horizontal

FH plane

Plane defined by point Porion left, point Porion right and point Orbitale-Mid

Sigmoid N plane

Plane through point Sigmoid N-Mid and parallel to plane FH plane

Mandibular F plane

Plane through point Mn Foramen-Mid and parallel to plane FH plane

Alveolar plane

Plane through point #36-46 cervical-Mid and parallel to plane FH plane

Vertical

Porion Coronal plane

Plane through point Porion left and Porion right and normal to plane FH plane

Condyle Coronal plane

Plane through point Condyle-left and Condyle-right and normal to plane FH plane

Mandibular F Coronal plane

Plane through point Mandibular F-left and Mandibular F-right and normal to plane FH plane

Coronoid pr Coronal plane

Plane through point Coronoid pr-left and Coronoid pr-right and normal to plane FH plane