Lower facial remodeling with botulinum toxin type A for the treatment of masseter hypertrophy

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.
Source: Anais Brasileiros de Dermatologia - Category: Dermatology Source Type: research