The nasolabial fold: an attempt at synthesis

Area of Science:

• Anatomy
• Facial Aesthetics
• Dermatology

Background:

• The nasolabial fold is a complex facial structure.
• Understanding its dynamic nature is crucial for aesthetic assessments.

Purpose of the Study:

• To synthesize current knowledge on the nasolabial fold.
• To explain the fold's dynamic equilibrium and its relation to facial structures.

Main Methods:

• Literature synthesis.
• Conceptual analysis using "rest dynamic equilibrium" theory.
• Illustrative photographic comparison.

Main Results:

• The nasolabial fold is an evolutive border, not a static feature.
• Its appearance (convex vs. concave) depends on fibromuscular terminations interacting with the superficial musculoaponeurotic system.

Conclusions:

• The "rest dynamic equilibrium" concept provides a framework for understanding nasolabial fold dynamics.
• Facial muscle and fat pad interactions significantly influence the nasolabial fold's appearance.