Subject Global Evaluation and Subject Satisfaction Using Injectable Poly-l-Lactic Acid versus Human Collagen for the Correction of Nasolabial Fold Wrinkles

Treatment of nasolabial fold wrinkles with injectable poly-l-lactic acid resulted in statistically significantly higher Subject Global Evaluation and Subject Satisfaction scores compared with human collagen at 13 months. Injectable poly-l-lactic acid-treated subjects maintained improvements for up to 25 months after treatment.