RHA Redensity - Perioral Rhytids

Randomized, blinded, No-Treatment control, multi-center, prospective clinical study, to identify whether TEOSYAL RHA® Redensity is more effective than No-Treatment in the correction of moderate to severe dynamic perioral rhytids at Week 8 after last treatment (i.e., initial or touch-up treatment). The Treating Investigator (TI) at screening will evaluate the subject's perioral rhytids severity using the Perioral Rhytids Severity Rating Scale (PR-SRS) for eligibility of the subject for the study. The Blinded Live Evaluator (BLE) at screening will evaluate the subject's perioral rhytids severity using the PR-SRS in order to confirm eligibility and to establish a pre-treatment (Baseline) score for assessment of effectiveness. This is done independently of the TI, and exact concordance between the BLE and the TI is not necessary for eligibility of the subject in this study. Enrolled subjects will be randomized to either the TEOSYAL RHA® Redensity treatment group or the "No-Treatment" control group (ratio 3:1). The TI will administrate the study device, and if necessary, subjects will receive a touch-up treatment 14 days following the initial treatment to optimize the results. The TI will conduct safety and effectiveness evaluations at study visits, which occurred at Week 4, 8, 12, 16, 24, 36, and 52 after the last treatment, (i.e., initial or touch-up treatment) and 4 weeks after a Repeat-Treatment. The Blinded Live Evaluator (BLE) will conduct assessments of effectiveness during the trial, including assessment of the primary endpoint at Week 8 after the last treatment (i.e., initial or touch-up treatment). The BLE will conduct effectiveness evaluations at Week 8, 12, 16, 24, 36, and 52 after the last treatment (i.e., initial or touch-up treatment). All subjects will be followed for 52 weeks after the last treatment (i.e., initial treatment or touch-up), at which point they will be offered Repeat-Treatment (provided that the TI deems the treatment to be appropriate and the subject agrees) and will be then followed for 4 weeks after Repeat-Treatment before exiting the study. If a subject returns to his pre-treatment PR-SRS score at Week 12 or Week 16 or Week 24 or Week 36 after initial treatment or touch up (as assessed by the TI), subjects are eligible for optional Early-Retreatment if necessary at 12 or 16 or 24 or 36 weeks after last treatment (provided that the TI deems the treatment appropriate, and the subject agrees). Subjects will be then followed for an additional 4 weeks after Repeat-Treatment. Subjects who will receive optional Early-Retreatment at Week 12 or Week 16 or Week 24 or Week 36 after the after initial treatment or touch-up, will be offered Repeat-Treatment at Week 52. Subjects randomized to the "No-Treatment" control group will receive their first treatment after the primary endpoint evaluation (Week 8 after randomization) and then will be followed the same schedule as the initial treatment group.