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Table 1 Summary of patients

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 4 6
Amount of setback (mm) 7.61 ± 4.04 5.70 ± 2.44
Additional treatment LeFort I osteotomy 5 3
Genioplasty 3 5
Angle reduction 0 1
Lower border reduction 1 0