Petrus Gary M, Lewis David, Maas Corey S
The Maas Clinic, San Francisco, CA 94109, USA.
Facial Plast Surg Clin North Am. 2007 Feb;15(1):1-9, v. doi: 10.1016/j.fsc.2006.12.003.
Botulinum toxin A treatment continues to increase in popularity and number. Many more patients are undergoing cosmetic Botox procedures and many, diverse practitioners are providing them. The best results are obtained from a careful history and physical examination of the patient combined with a detailed understanding of facial and neck anatomy. Understanding the dynamic anatomic relationships, such as agonist-antagonist muscles and contraction force vectors, is key to providing the patient with an excellent outcome.