SMAS
Pronunciation: SMAS (as acronym)
Also written as: SMAS — Superficial Musculoaponeurotic System
Superficial musculoaponeurotic system - fibrous layer connecting facial muscles to overlying skin.
Full Definition
The superficial musculoaponeurotic system (SMAS) is a continuous fibromuscular layer that extends from the platysma muscle in the neck to the temporoparietal fascia above the zygomatic arch. This anatomical structure is crucial in facial plastic surgery as it provides the foundation for natural facial rejuvenation procedures. SMAS manipulation allows for repositioning of deeper facial tissues while maintaining natural facial expressions and avoiding an over-tight appearance. Understanding SMAS anatomy is essential for safe and effective rhytidectomy techniques, as improper dissection can result in facial nerve injury or suboptimal results.
Usage
Usage note: Always capitalize when used as acronym; spell out on first use in formal documents.
In Context
- "SMAS elevation and repositioning provided lasting improvement in midface projection." — operative note
- "Proper SMAS identification prevents inadvertent injury to underlying facial nerve branches." — surgical anatomy text