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Southern Illinois University School of Medicine, USA
Posters & Accepted Abstracts: J Clin Exp Dermatol Res
The masseter muscle is a quadrangular muscle that covers the mandibular Ramus and coronoid process. It has both superficial and deep heads. The reduction of the superficial head of the masseter muscle improves the contour of the lower face while having a minimal effect on the mastication or temporomandibular joint function. Injection of Botulinum toxin into the masseter muscle results in a chemical denervation at the neuromuscular junction. The ensuing muscle atrophy reduces the bulkiness of the lower lateral face and gives a soft round contour to the lower face.