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

Table 2

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

Surgical movements (T2-T1)	Mean	SD
PNS-PPW
Zisser ( = 7)	−0.2	0.7	0.45
Le Fort ( = 7)	6.5	3.6	0.03^*
PNS-PPW90
Zisser ( = 7)	−0.1	0.9	0.52
Le Fort ( = 7)	6.1	2.7	0.03^*
U-PPW
Zisser ( = 7)	0.6	1.5	0.27
Le Fort ( = 7)	1.9	2.4	0.14
U-PPW90
Zisser ( = 7)	1.0	1.2	0.08
Le Fort ( = 7)	1.2	1.7	0.14
PNS-ANS
Zisser ( = 7)	5.8	2.9	0.02^*
Le Fort ( = 7)	1.5	2.0	0.07
PNS-U
Zisser ( = 7)	1.0	1.6	0.14
Le Fort ( = 7)	2.1	3.0	0.12
SN-ANS90
Zisser ( = 7)	2.3	5.9	0.35
Le Fort ( = 7)	1.9	2.3	0.12
SN-PNS90
Zisser ( = 7)	0.5	2.7	0.50
Le Fort ( = 7)	3.0	4.8	0.12
SN-PP angle
Zisser ( = 7)	−0.9	4.1	0.72
Le Fort ( = 7)	1.0	2.2	0.29
Area
Zisser ( = 7)	10.4	21.9	0.18
Le Fort ( = 7)	66.4	62.2	0.03^*

Significant difference.