Hyaluronic Acid Filler
Pronunciation: hy-ah-lyoo-RON-ik AS-id FIL-er
An injectable gel composed of cross-linked hyaluronic acid used to restore volume, smooth wrinkles, and augment facial contours in cosmetic dermatology procedures.
Full Definition
Hyaluronic acid (HA) fillers are biodegradable, injectable dermal fillers made from a synthetic or biosynthetic form of hyaluronic acid, a naturally occurring polysaccharide found in connective tissue. They are used to plump lips, fill nasolabial folds, restore cheek volume, and correct tear troughs, among other indications. Cross-linking of the HA molecules determines the product's viscosity, longevity, and suitability for different tissue depths. Effects generally last six to eighteen months depending on the product and injection site. Brand names include Juvederm, Restylane, and Belotero; editors must capitalise these trademarks and avoid using them generically.
Usage
Usage note: Distinguish clearly from collagen stimulators (e.g., poly-L-lactic acid) and from neurotoxins. 'Filler' alone is acceptable in semi-formal copy only when context is unambiguous.
In Context
- "A hyaluronic acid filler was selected for lip augmentation owing to its reversibility with hyaluronidase." — Clinical procedure note
- "The brochure incorrectly described the hyaluronic acid filler as a 'muscle relaxant', which required editorial correction." — Marketing copy review