From: The effect of botulinum toxin-A injection into the masseter muscles on prevention of plate fracture and post-operative relapse in patients receiving orthognathic surgery
No treatment
BTX-A injection
Age (years)
24.0 ± 6.1
21.3 ± 2.4
Sex
Female
4
2
Male
6
Amount of setback (mm)
7.61 ± 4.04
5.70 ± 2.44
Additional treatment
LeFort I osteotomy
5
3
Genioplasty
Angle reduction
0
1
Lower border reduction