Table 1: The Comparison of Linear and Angular Parameters Describing Morphological Features of the Facial Skeleton before and after Treatment. Mean Values ± SD were given

Feature Before Treatment n=50 After Treatment n=50 P<
Linear Measurements (mm),
Length of anterior base 73.3 ± 3.9 73.4±3.9
Length of maxilla 57.5 ± 3.4 57.7± 3.6
Length of mandible 79.5 ± 5.2 79.5± 4.9
Distance +1 from NA 3.5 ± 3.5 3.9±3.6
Distance -1 from NB 3.0 ± 1.9 3.5±2.8 0.05
The anterior vertical dimension of the face 118.7 ± 9.0 121.5± 10.2 0.001
The posterior vertical dimension of the face 76.9 ± 8.5 76.2 ± 8.6
Angular Measurements ( 0 )
SNA angle 82.3 ± 4.4 82.4 ± 4.2
SNB angle 80.9 ± 4.8 80.4 ± 4.4
ANB angle 1.5 ± 2.0 2.6 ± 2.9 0.002
N-Ba-S angle 127.7 ± 5.7 127.4 ± 5.8
NSL/NL( maxillary inclination) 7.0 ± 2.9 7.1 ± 3.2
NSL/ML( mandible inclination) 23.6 ± 6.8 27.5 ± 6.1 0.001
Inclination of upper incisors 72.3 ± 11.4 72.6 ± 10.8
Inclination of lower incisors 87.1 ± 8.1 86.4 ± 7.8
Inter-incisor angle 141.1 ± 9.1 138.7 ± 13.3 0.002
Ar-Go-N angle 50.9 ± 3.6 49.5±3.7
N-Go-Me angle 68.7 ± 4.9 71.3±4.5 0,001
Basal angle 18.8 ± 6.8 25.6±5.7 0.001
Facial axis angle 92.3 ± 4.7 89.7±9 0.001

P< statistically significant difference between the result before and after the treatment