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Table 1 The cortical bone thickness and the cross-sectional areas of masseter muscle after BTX-A injection

From: S100 and p65 expression are increased in the masseter muscle after botulinum toxin-A injection

Group Cortical bone thickness Cross-sectional area
Average (mm) P value Average (μm2) P value
Saline-treated 0.18 ± 0.05 621.68 ± 87.74
5-U BTX-A-treated 0.15 ± 0.05 NS 495.42 ± 110.15 0.037
10-U BTX-A-treated 0.10 ± 0.03 NS 263.05 ± 115.31 <0.001
  1. The P value was calculated by post hoc test and compared with the saline-treated group
  2. BTX-A botulinum toxin-A