Botulinum toxin: a review of applications for the head and neck.

Botulinum toxin (BTX) is a popular cosmetic therapy administered by both dentists and physicians. The ability of the toxin to locally paralyze muscles has led to the use of BTX as a potential therapy for a variety of medical conditions. This article will discuss the current head and neck applications of BTX. In addition, a brief review of other potential clinical benefits is provided.