Related Experiment Video
Updated: Jan 7, 2026

Author Spotlight: Advancing Facial Rejuvenation Therapy with Post-Laser Salicylic Acid Application
Published on: September 27, 2024
Aesthetic Improvement, Facial Harmony, and Patient Satisfaction after Lower Face Treatment with a Hyaluronic Acid
Steven H Dayan1, Corey L Hartman2, Carlo Di Gregorio3
1Dr. Dayan is with DeNova Research in Chicago, Illinois.
Objective:
The authors sought to evaluate a flexible, hyaluronic acid (HA) filler, Restylane® Defyne™ (HADEF) (Galderma), for combined treatment of chin, nasolabial folds (NLFs), and marionette lines (MLs), in a predefined stepwise order, comparing Down-up (ie, chin first) versus Top-down (NLFs and MLs first) treatment approaches. This postmarketing study complements prior pivotal investigations that demonstrated the safety and effectiveness of HADEF treatments of the lower face, by providing a standardized treatment algorithm for combining several treatment areas in the lower face.
Methods:
HADEF was injected at Day 1 in the first treatment area and at Week 3 in the second area (randomized to either Down-up or Top-down order), with optional touch-up (any area) at Week 6. Assessments included Global Aesthetic Improvement Scale (GAIS), skin firmness, facial harmony, patient satisfaction, and safety until Week 9.
Results:
Both approaches achieved similar, favorable results at Week 9, with 100% of patients in both groups (Down-up, n=31; Top-down, n=29) demonstrating aesthetic improvement on the GAIS, improved skin firmness and facial harmony, and natural-looking results. Of patients seeking aesthetic improvement of the submental area, 95% in the Top-down group and 100% in the Down-up achieved improvement. Patient-reported endpoints supported these results, with high satisfaction throughout the study. HADEF was well tolerated throughout the study.
Limitations:
The results should be considered indicative rather than definitive given the post-marketing design of the study.
Conclusion:
Both stepwise approaches may be used for administering HADEF when treating the combined areas of chin, NLFs, and MLs.

