Four Hyaluronic Acid Fillers for Lip Augmentation

The primary study treatment site will be the vermilion (body of the lip); additional areas (vermilion borders, Cupid's bow, philtral columns, and/or oral commissures) will be treated if deemed appropriate by the treating physician. Treatment will be administered through intradermal, subdermal, and/or intramuscular injection within the orbicularis oris muscle. Injection techniques for each area will include linear threading, serial puncture, fanning, and/or cross-hatching. The treating physician will determine the appropriate volume to inject based on clinical experience and the subject's goals for lip augmentation.