UAC reduced maxillofacial mechanical threshold in female rats. A, B: Maxillofacial mechanical threshold ipsilateral (A) and contralateral (B) in the UAC and sham treated rats (n = 9–11 per group). *, **, *** p < 0.05, 0.01, 0.001 vs. baseline (b); #, ##, ### p < 0.05, 0.01, 0.001 vs. the sham group at the same time point. C, D: There were no differences in the maxillofacial mechanical threshold between the left and right sides in the UAC group (C) and sham group (D).