The authors sought to compare the newest U.S. Food and Drug Administration–approved botulinum toxin type A product, incobotulinumtoxinA, to onabotulinumtoxinA for upper face wrinkles. This is the first prospective, split-face, randomized, double-blind study addressing three types of facial wrinkles using a 1:1 dose ratio.
The study was designed, institutional review board approval was obtained, and 45 patients were enrolled. A three-judge independent reviewer panel compared photographs of patients to the upper face validated assessment scales, selecting a grade ranging from 0 (no lines) to 4 (very severe) for the degree of glabellar lines, crow’s feet, and forehead lines for each side of the face for photographs taken before treatment and 3 days, 2 weeks, 3 months, and 4 months after treatment. For toxin comparison, the difference in the magnitude of the degree of wrinkle scale at each period compared to before treatment was calculated and statistical analysis performed. Individual wrinkle types and all three wrinkle types combined were analyzed.
Both products offered significant reduction in individual and combined wrinkles at comparable time points; however, onabotulinumtoxinA had significantly greater combined dynamic wrinkle reduction at 3 days (p < 0.010), 2 weeks (p < 0.008), 3 months (p < 0.013), and 4 months (p < 0.045).
For identical dosage, both onabotulinumtoxinA and incobotulinumtoxinA are safe and effective in reducing dynamic wrinkles in the upper face; however, for the authors’ dosages, onabotulinumtoxinA had statistically greater efficacy at 3 days, 2 weeks, 3 months, and 4 months.
Winter Park and Sarasota, Fla.
From YMD Eye & Face; and Center for Sight.
Received for publication April 24, 2014; accepted September 25, 2014.
This trial is registered under the name “Split-Face Prospective Study Comparing Botox to Xeomin for the Treatment of Facial Wrinkles,” Clinical Trials.gov identification number NCT02122536 (https://clinicaltrials.gov/ct2/show/NCT02122536).
Disclosure: Dr. Fezza is a speaker, consultant, and on the advisory board of Allergan and on the advisory board of Merz. He is also a speaker for Lumenis. The other author has no conflicts of interest to declare. No external funding was received for this study.
Ruth Hill Yeilding, M.D., YMD Eye & Face, 328 West Morse Boulevard, Winter Park, Fla. 32789, firstname.lastname@example.org