12-Month controlled study in the United States of the safety and efficacy of a permanent 2.5% polyacrylamide hydrogel soft-tissue filler

Dermatol Surg. 2010 Nov;36 Suppl 3:1819-29. doi: 10.1111/j.1524-4725.2010.01736.x.


Objective: To evaluate the safety and efficacy of a 2.5% polyacrylamide hydrogel in the aesthetic enhancement of nasolabial folds.

Methods and materials: The safety and efficacy of a polyacrylamide hydrogel were compared with those of nonanimal stabilized hyaluronic acid (NASHA) in 315 subjects in a double-blind, randomized, multicenter, noninferiority trial with a 12-month follow-up. The primary efficacy end point was mean change in Wrinkle Assessment Scale (WAS) scores at 6 months. The primary safety end point was rate of serious adverse events (AEs) through 12 months after treatment.

Results: Polyacrylamide hydrogel was as effective as NASHA, and effectiveness persisted throughout the 12-month follow-up. Treatment-related AEs occurred with equal incidence; most were mild to moderate, transient, and related to injection procedure. One serious AE (infection) was thought to be related to treatment with polyacrylamide hydrogel; it resolved within 5 days after appropriate treatment.

Conclusion: This 2.5% polyacrylamide hydrogel offers promise as a long-lasting soft tissue filler. It is well tolerated, as effective as NASHA in correction of nasolabial folds, and persistent. Longer evaluation is required to evaluate longer-term safety and demonstrate duration of effect beyond 12 months. This

Publication types

  • Comparative Study
  • Multicenter Study
  • Randomized Controlled Trial
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Acrylic Resins / administration & dosage*
  • Double-Blind Method
  • Female
  • Follow-Up Studies
  • Humans
  • Injections
  • Male
  • Middle Aged
  • Prostheses and Implants / standards*
  • Rhytidoplasty / standards*
  • Skin Aging / drug effects*
  • Time Factors
  • Treatment Outcome
  • United States


  • Acrylic Resins
  • polyacrylamide gels