Clinical Comparison between Two Hyaluronic Acid–Derived Fillers in the Treatment of Nasolabial Folds

Background. Hyaluronic acid–derived injectible fillers are ideal to reduce the appearance of nasolabial folding because their effect is relatively long-lasting, the material is malleable and easy to use, and there is a very low incidence of allergic reaction. Objective. To compare the tolerability and efficacy of two commercially available hyaluronic acid–based fillers, Hylaform (Inamed Aesthetics, Inc., Santa Barbara, CA, USA) and Restylane...