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. 2017 Oct 6;44(2):249–260. doi: 10.1097/DSS.0000000000001277

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© 2017 The Author(s). Published by Wolters Kluwer Health, Inc. on behalf of the American Society for Dermatologic Surgery, Inc.

This is an open-access article distributed under the terms of the Creative Commons Attribution-Non Commercial-No Derivatives License 4.0 (CCBY-NC-ND), where it is permissible to download and share the work provided it is properly cited. The work cannot be changed in any way or used commercially without permission from the journal.

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Figure 1. — Line chart and histogram demonstrating the percentage of the masseter muscle reduction in thickness and volume observed in Groups I (who strengthened their masticatory movements) and II (control group). The maximal reduction in masseter muscle was observed 3 to 4 months after injection, and there were no statistically significant differences in the 2 groups before this stage. However, the duration of the masseter muscles' decrease was significantly longer in Group I than in Group II. Republished with permission of American Society for Dermatologic Surgery, from prolonging the duration of masseter muscle reduction by adjusting the masticatory movements after the treatment of masseter muscle hypertrophy with botulinum toxin type A injection, Wei and colleagues, 41, S1, 2015; permission conveyed through Copyright Clearance Center, Inc.