RESUMEN
BACKGROUND: The treatment of perioral vertical wrinkles is a very common request from female patients as of their 40th decade of life. Actinic damage, cigarette smoking, loss of deep structures volume, sleep positions, orthodontic deformities, and dynamic components have been thought to cause this aesthetic problem. OBJECTIVE: The objective was to investigate the combination of botulinum toxin type A (BoNTA) pretreatment of the orbicularis oris muscle with manual chemabrasion to increase its clinical efficacy in the therapy of upper perioral vertical rhytides. METHODS: Twelve women presenting moderate to severe upper lip vertical rhytides were randomized to receive two unilateral BoNTA injections at the vermilion border, 1 week before chemabrasion (35% trichloroacetic acid followed by dermasanding) of the upper perioral cosmetic unit. Wrinkle severity was assessed by two blinded observers at baseline, 30 days, 90 days, 180 days, and 3 years by using a four-point Facial Wrinkle Severity Scale (FWSS). RESULTS: From Day 90 to Year 3, the BoNTA-injected sides showed smaller grades in the FWSS than control sides (p<.05). CONCLUSION: Previous injections of BoNTA improve short- and long-term results of chemabrasion in the upper lip region.