Masseter Muscle Volume Changes Evaluated by 3-Dimensional Computed Tomography After Repeated Botulinum Toxin A Injections in Patients With Square Facial Morphology
| Autor: | Philip Kuo Ting Chen, Jyh-Ping Chen, Che Min Lin, Christopher Glenn Wallace, Chun Shin Chang, Susie Lin, Lun-Jou Lo, Zung Chung Chen, Yen Chang Hsiao, Yu Ray Chen, Gavin Chun-Wui Kang |
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| Rok vydání: | 2018 |
| Předmět: |
Adult
Esthetics 3 dimensional computed tomography 030230 surgery Injections Intralesional Injections Intramuscular Sampling Studies Statistics Nonparametric Botulinum toxin a Masseter muscle 03 medical and health sciences 0302 clinical medicine Imaging Three-Dimensional Medicine Neurotoxin Humans In patient Botulinum Toxins Type A Contouring business.industry Masseter Muscle Hypertrophy Organ Size Middle Aged Treatment Outcome 030220 oncology & carcinogenesis Surgery Female Tomography business Nuclear medicine Tomography X-Ray Computed Volume (compression) |
| Zdroj: | Annals of plastic surgery. 82(1S Suppl 1) |
| ISSN: | 1536-3708 |
| Popis: | 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.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.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).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).Three consecutive 6-monthly BoNT-A injections into the MMs reduced their volume by 12% when assessed 1 year after completion of treatment. |
| Databáze: | OpenAIRE |
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