Masseter Muscle Volume Changes Evaluated by 3-Dimensional Computed Tomography After Repeated Botulinum Toxin A Injections in Patients With Square Facial Morphology

Chun Shin Chang, Susie Lin, Christopher Glenn Wallace, Yen Chang Hsiao, Che Min Lin, Gavin Chun Wui Kang, Zung Chung Chen, Philip Kuo Ting Chen, Lun Jou Lo, Yu Ray Chen, Jyh Ping Chen

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摘要

INTRODUCTION: Botulinum neurotoxin A (BoNT-A) is a minimally invasive and technically straightforward treatment of masseter muscle (MM) volume reduction and facial contouring, but the literature on its long-term effect on MM volume remains unclear. OBJECTIVE: This study aimed to assess quantitatively for progressive volume changes of lower facial contour after 3 BoNT-A injections in patients with bilateral MM hypertrophy causing square facial morphology using 3-dimensional computed tomographic scans. MATERIALS AND METHODS: Ten female patients with square facial morphology due to bilateral MM hypertrophy were recruited to, and 6 completed, this clinical study. Each received 24 U of BoNT-A into the inferior portion of each MM on both sides, repeated 6 monthly to complete 3 treatments. Masseter muscle volume changes were assessed using 3-dimensional computed tomography at pretreatment (before injections) and posttreatment (1 year after the third injection). RESULTS: Mean MM volume significantly reduced from 26.39 ± 4.18 cm before treatment to 23.26 ± 4.31 cm 1 year after treatment (P = 0.002). CONCLUSION: Three consecutive 6-monthly BoNT-A injections into the MMs reduced their volume by 12% when assessed 1 year after completion of treatment.

原文英語
頁(從 - 到)S29-S32
期刊Annals of Plastic Surgery
82
發行號1S Suppl 1
DOIs
出版狀態已發佈 - 一月 1 2019
對外發佈Yes

ASJC Scopus subject areas

  • Surgery

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