Skip to main content

Table 1 Definition of the translational and rotational discrepancies between the planned and the achieved maxillary position

From: Predictability of maxillary positioning: a 3D comparison of virtual and conventional orthognathic surgery planning

Abbreviation

Measurement

Definition

Translation—linear measurements (mm)

 U1 (x)

Sagittal translation (x-axis)

Shortest distance between the midpoint of the upper central incisors on the planned and the achieved maxillary position in sagittal direction

 U1 (y)

Transversal translation (y-axis)

Shortest distance between the midpoint of the upper central incisors on the planned and the achieved maxillary position in transversal direction

 U1 (z)

Vertical translation (z-axis)

Shortest distance between the midpoint of the upper central incisors on the planned and the achieved maxillary position in vertical direction

Rotation—Angular measurements (°)

 OcP (x)

Rotation of the upper occlusal plane around the sagittal (x-) axis

Angular difference between the upper occlusal plane of the planned and the achieved maxillary position projected onto the frontal plane

 OcP (y)

Rotation of the upper occlusal plane around the transversal (y-) axis

Angular difference between the upper occlusal plane of the planned and the achieved maxillary position projected onto the midsagittal plane

 OcP (z)

Rotation of the upper occlusal plane around the vertical (z-) axis

Angular difference between the maxillary sagittal plane of the planned and the achieved maxillary position projected onto the Frankfurt Horizontal plane