Depth of Botulinum Neurotoxin Injection for Treatment of Glabellar Lines

Summary

STUDY QUESTION: Does the depth of injection of onabotulinumtoxinA neurotoxin in the glabellar complex affect efficacy of the BoTN for the improvement of glabellar frown lines? STUDY AIM * Primary objective: Compare the efficacy of onabotulinumtoxinA neurotoxin injected at the depth of 2mm vs 4mm for the improvement of glabellar lines * Secondary objective: Determine any adverse effects of onabotulinumtoxinA neurotoxin injected at the depth of 2mm vs 4mm RATIONALE FOR THE PROJECT: Although the use of BoTN for treatment of glabellar lines has long been established as safe and effective, the optimal depth of injection has not been established. Our project hopes to establish the optimal depth of injection for onabotulinumtoxinA neurotoxin for maximal improvement of glabellar lines with minimal adverse effects

Timeline

Start

2023-03-14

Primary completion

2023-06-20

Completion

2026-12

Publications

• Background Giordano CN, Matarasso SL, Ozog DM. Injectable and topical neurotoxins in dermatology: Indications, adverse events, and controversies. J Am Acad Dermatol. 2017 Jun;76(6):1027-1042. doi: 10.1016/j.jaad.2016.11.012.
• Background Gostimir M, Liou V, Yoon MK. Safety of Botulinum Toxin A Injections for Facial Rejuvenation: A Meta-Analysis of 9,669 Patients. Ophthalmic Plast Reconstr Surg. 2023 Jan-Feb 01;39(1):13-25. doi: 10.1097/IOP.0000000000002169. Epub 2022 Mar 30.
• Background Giordano CN, Matarasso SL, Ozog DM. Injectable and topical neurotoxins in dermatology: Basic science, anatomy, and therapeutic agents. J Am Acad Dermatol. 2017 Jun;76(6):1013-1024. doi: 10.1016/j.jaad.2016.11.022.
• Background Cho Y, Lee HJ, Lee KW, Lee KL, Kang JS, Kim HJ. Ultrasonographic and Three-Dimensional Analyses at the Glabella and Radix of the Nose for Botulinum Neurotoxin Injection Procedures into the Procerus Muscle. Toxins (Basel). 2019 Sep 24;11(10):560. doi: 10.3390/toxins11100560.
• Background Lee HJ, Lee KW, Tansatit T, Kim HJ. Three-Dimensional Territory and Depth of the Corrugator Supercilii: Application to Botulinum Neurotoxin Injection. Clin Anat. 2020 Jul;33(5):795-803. doi: 10.1002/ca.23507. Epub 2019 Nov 13.
• Background Sneath J, Humphrey S, Carruthers A, Carruthers J. Injecting botulinum toxin at different depths is not effective for the correction of eyebrow asymmetry. Dermatol Surg. 2015 Jan;41 Suppl 1:S82-7. doi: 10.1097/DSS.0000000000000159.
• Background Mahmoud BH, Burnett C, Ozog D. Prospective randomized controlled study to determine the effect of topical application of botulinum toxin A for crow's feet after treatment with ablative fractional CO2 laser. Dermatol Surg. 2015 Jan;41 Suppl 1:S75-81. doi: 10.1097/01.DSS.0000452642.83894.ab.

Drugs

Indications

No indication recorded.