Twelve-month persistency of a novel ribose-cross-linked collagen dermal filler.

[BACKGROUND] The porcine collagen-derived dermal filler Dermicol-P35 (Evolence, Colbar LifeScience Ltd, Herzliya, Israel) has low immunogenicity and the potential to provide a long-lasting corrective response for soft-tissue contour deficiencies and deformities. OBJECTIVE The objective was to assess the persistence of the corrective response with Dermicol-P35 up to 12 months after obtaining an optimal cosmetic result (OCR) in a randomized, multicenter study comparing the efficacy and safety of Dermicol-P35 with the hyaluronic acid (HA) filler Restylane (Medicis Pharmaceutical Co.).

[METHODS & MATERIALS] Subjects with moderate to deep nasolabial wrinkles (n=149) were randomized to injections of either Dermicol-P35 or HA on one side of the face and the alternative preparation on the contralateral side. If necessary, one touch-up injection could be given after 2 weeks to obtain an OCR.

[RESULTS] Although the mean Modified Fitzpatrick Wrinkle Scale score increased gradually after achieving the OCR with Dermicol-P35, 95.3 and 76.5% of subjects, respectively, met the criteria for persistence of the corrective response after 9 and 12 months. Persistency rates were similar regardless of the requirement for a touch-up injection at Week 2. No unexpected, severe, or serious injection-related adverse events were experienced.

[CONCLUSION] The effectiveness of Dermicol-P35 appears to be maintained for up to 1 year after achieving an OCR, both for touch-up and for non-touch-up subjects.