Facial anatomy and the application of fillers and botulinum toxin - Part I

"The use of botulinum toxin and cutaneous filling techniques has encouraged a renewed interest in the study of facial anatomy. An assessment of the influence of facial structures in the aging process requires an in-depth understanding of the constitution of the epidermis, dermis and subcutaneous tissue. It is also essential to study the boundaries of facial segments and bones, the musculature, vas…