Abstract | BACKGROUND: OBJECTIVES: The goal of the present study was to evaluate the efficacy of abobotulin toxin use in masseter hipertrophy treatment in Brazilians. METHODS: Ten Brazilian female patients with masseter hypertrophy were subjected to injections of 90U of abobotulinum toxin A applied on each side respecting the safety zone stabilished in literature and were followed up for 24 weeks. RESULTS: When analyzing the coefficients between measures of middle and lower third of the face obtained from standardized photographs, an increase was observed, with statistical significance at 2 weeks (p=0.005) and 12 weeks (p=0.001). The progression of lower third reduction was 3.94%, 5.26%, 11.99%, and 5.47% (2, 4, 12, and 24 weeks respectively). All patients showed improvement in bruxism after treatment. Observed adverse effects were masticatory fatigue, smile limitation, and smile asymmetry. CONCLUSION: The use of abobotulinum toxin A for masseter hypertrophy is effective in Brazilians and reached its maximum effect of facial thinning at 12 weeks. Smile limitation had a higher incidence compared to that reported in the literature and may result from risorius muscle blockage caused by toxin dissemination. Despite its side effects, 80% of the patients would like to repeat the treatment.
|
Authors | Fernanda Homem de Mello de Souza Klein, Fabiane Mulinari Brenner, Maurício Shigeru Sato, Fernanda Manfron Batista Rosas Robert, Karin Adriane Helmer |
Journal | Anais brasileiros de dermatologia
(An Bras Dermatol)
2014 Nov-Dec
Vol. 89
Issue 6
Pg. 878-84
ISSN: 1806-4841 [Electronic] Spain |
PMID | 25387491
(Publication Type: Evaluation Study, Journal Article)
|
Chemical References |
- Neuromuscular Agents
- Botulinum Toxins, Type A
|
Topics |
- Adult
- Botulinum Toxins, Type A
(therapeutic use)
- Brazil
(ethnology)
- Face
- Female
- Humans
- Hypertrophy
(drug therapy)
- Injections, Intramuscular
- Masseter Muscle
(abnormalities, drug effects)
- Neuromuscular Agents
(therapeutic use)
- Smiling
(physiology)
- Time Factors
- Treatment Outcome
|