Table 1.

Spatial Movements of Distal Segments^a

Measurement	Preoperative to Simulated
RL, mm	1.50
AP, mm	7.32
SI, mm	3.41
P, °	−0.20
R, °	0.75
Y, °	0.34

^aAP indicates anterior-posterior translation; P, pitch; R, roll; RL, right-left translation; SI, superior-inferior translation; Y, yaw. The reference bony landmark for translation (RL, AP, SI) and orientation (P, R, Y) is Pogonion. For RL, “>0” indicates the right direction. For AP, “>0” indicates the anterior direction. For SI, “>0” indicates the superior direction. For P, “<0” indicates the anterior of the distal segment rotated downward. For R, “>0” indicates the left of the distal segment rotated upward. For Y, “>0” indicates the anterior of the distal segment turned left.