Hyaluronic Acid Fillers: Science and Clinical Uses.

Hyaluronic acid soft tissue fillers include a range of products (Juvederm Ultra, Juvederm Ultra Plus, Voluma, Restylane Silk, Restylane, Restylane Lyft, and Belotero Balance) that are used commonly for facial rejuvenation and enhancement of facial features. Although these products are similar in many ways, they are not interchangeable and have unique characteristics that need to be considered. Injection sites and techniques for facial rejuvenation are discussed.