Effectiveness and Safety of a Hyaluronic Acid Filler for Chin Augmentation and Correction of Chin Retrusion: A Multi-center, Prospective, Randomized Controlled Trial

Background The chin significantly influences facial aesthetics, contributing to the overall balance and harmony of the face. This study aimed to assess the effectiveness of the hyaluronic acid filler Hyamax (R) Volumizer for chin augmentation and correction of chin retrusion compared to a no-treatment control. Methods Participants aged 18-55 years with mild to moderate chin retrusion were randomized in a 3:1 ratio to receive either the treatment group (n = 150) or control group (n = 50). Evaluations included blinded assessments using the validated Galderma Chin Retrusion Scale, Global Aesthetic Improvement Scale for aesthetic enhancement, and safety follow-up. Results The Galderma Chin Retrusion Scale responder rate (>= 1 grade improvement) was significantly higher for the treatment group (70%) compared to the control group (0%) at 6 months (p < 0.0001), and remained higher at 12 months (54.67% vs. 0%; p < 0.0001). Aesthetic improvement rates were consistently high as reported by both blinded evaluating investigator (>= 89.33%) and subjects (>= 91.33%). Treatment-related adverse events were mild to moderate. Conclusion Hyamax (R) Volumizer treatment is safe and effective when injected in the chin to treat chin retrusion, with results lasting through 1 year. Level of Evidence I This journal requires that authors assign a level of evidence to each article. For a full description of these Evidence-Based Medicine ratings, please refer to the Table of Contents or the online Instructions to Authors www.springer.com/00266.