A randomized, evaluator-blinded, controlled study of the effectiveness and safety of small gel particle hyaluronic acid for lip augmentation

Abstract

Objectives To assess the effectiveness and safety of small gel particle hyaluronic acid (SGP-HA) for lip augmentation. Methods Adults (n = 180; aged 18-65) scoring 1 (very thin) to 2 (thin) on the 5-point validated Medicis Lip Fullness Scale (MLFS) for the upper or lower lip were randomized (3:1) to SGP-HA (≤1.5 mL/lip) or no treatment. Co-primary effectiveness end points were blinded-evaluator MLFS score for upper or lower lip at week 8. Secondary end points (MLFS score, independent photographic review, Global Aesthetic Improvement Scale [GAIS], safety assessments) were measured throughout the study. Results Statistically significantly more MLFS responders (≥1 grades of MLFS improvement at week 8) received SGP-HA (93% combined upper and lower lip responders [95% upper lip; 94% lower lip]) than no treatment (29% combined; p