Dimensions of Velopharyngeal Space following Maxillary Advancement with Le Fort I Osteotomy Compared to Zisser Segmental Osteotomy: A Cephalometric Study

Table 3

Postsurgical movements of all points and area for the Zisser and the Le Fort groups. Wilcoxon signed ranks test was used for the comparison.

Postsurgical movements (T3-T2)	Mean	SD
PNS-PPW
Zisser ( = 7)	2.0	5.4	1.0
Le Fort ( = 7)	−1.6	3.9	0.59
PNS-PPW90
Zisser ( = 7)	2.7	3.7	0.69
Le Fort ( = 7)	−1.7	3.0	0.29
U-PPW
Zisser ( = 7)	−1.0	2.1	0.30
Le Fort ( = 7)	−0.3	2.1	0.59
U-PPW90
Zisser ( = 7)	−0.9	22	0.60
Le Fort ( = 7)	0.3	1.5	1.0
PNS-ANS
Zisser ( = 7)	−0.2	0.8	0.41
Le Fort ( = 7)	−0.3	7.5	0.66
PNS-U
Zisser ( = 7)	−2.7	1.8	0.03^*
Le Fort ( = 7)	−1.6	2.1	0.29
SN-ANS90
Zisser ( = 7)	0.3	3.1	0.89
Le Fort ( = 7)	2.8	1.4	0.11
SN-PNS90
Zisser ( = 7)	0.9	2.2	0.35
Le Fort ( = 7)	2.4	2.0	0.11
SN-PP angle
Zisser ( = 7)	−0.3	1.4	0.58
Le Fort ( = 7)	−3.0	3.6	0.18
T3.area
Zisser ( = 7)	3.0	32.7	0.92
Le Fort ( = 7)	1.0	52.4	1.0

Significant difference.