Anatomical-Based Diagnosis and Filler Injection Techniques: Nasolabial Folds

Nasolabial folds significantly impact facial appearance and are a common aesthetic concern. This article reviews anatomic considerations and filler injection techniques for treating these folds, with a focus on the Korean population. The dermal filler used in this study is Maili hyaluronic acid filler (Sinclair Pharma), derived from a novel proprietary manufacturing technology known as OxiFree™ technology (Kylane Laboratoires , Switzerland). The study analyzes various injection techniques, including needle-based and cannula-based approaches, with emphasis on safe and effective practices such as the Fern leaf and Duck walk techniques. A layered injection approach addressing both superficial and deep tissue planes is examined. Three distinct types of nasolabial folds are identified: those caused by volume deficiency, tissue laxity, and muscular attachments. Each type requires a tailored treatment approach. It is not uncommon to find a combination of 2 of the types together in one person. The study highlights the importance of understanding anatomic variations, particularly the course of the facial artery in the Korean population, for safe injection practices. A thorough understanding of nasolabial fold anatomy and appropriate treatment strategies is crucial for achieving optimal outcomes in aesthetic medicine. This is especially important for the nasolabial folds, which are highly mobile, and could easily cause misplaced dermal fillers to migrate. Future research on combination intervention techniques, including botulinum toxin, lipolytic agents, and thread-lifting, may further enhance overall treatment efficacy.