Safety and Effectiveness of THIODERM STRONG in the Correction of Nasolabial Folds

Inclusion Criteria: * Females of childbearing potential must have a negative urine pregnancy test at Screening/ Baseline visit and must agree to use an adequate method of contraception for the duration of the clinical investigation * Signed informed consent * Moderate to severe nasolabial folds (cohort 2) * Healthy skin in the nasolabial area and free of diseases that could interfere in cutaneous aging evolution (cohort 2) * Willingness to abstain from any aesthetic or surgical procedures in the treatment area for the duration of the clinical investigation Exclusion Criteria: * For females: pregnant and/ or lactating or planning to become pregnant during the investigation * History of allergies or hypersensitivity to hyaluronic acid preparations, lidocaine or any amide-basede anesthetic * Tendency to keloid formation and/ or hypertrophic scars * Presence of infectious, inflammatory or proliferative cancerous or pre-cancerous lesions in the area to be treated * Recurrent herpes simplex in the treatment area * History or presence of any autoimmune or connective tissue disease, or current treatment with immunomodulating therapy * Diabetes mellitus or uncontrolled systemic diseases * History of bleeding disorder and/ or use of anticoagulant, antiplatelet or thrombolytic medication from ten days pre- to three days post-injection * Any medical condition prohibiting the inclusion in the clinical investigation according to the judgment of the investigator * Previous enrollment in this clinical investigation * Current participation in another clinical investigation, or treatment with any investigational drug/ medical device within 30 days prior to clinical investigation enrollment, or five half-lives of the investigational drug, whichever is longer * Any dependency of the subject to the investigator or investigation site, or subjects who are employees or relatives of the investigator * Subjects whose participation in clinical investigations is prohibited by the Austrian Medical Devices Act * Facial plastic surgery, tissue augmentation with silicone, fat or another non-absorbable substance in the area of device application (cohort 2) * Implantation of facial dermal fillers in the treatment area in the preceding 12 months (cohort 2) * Skin of the nasolabial region affected by aesthetic treatments or planning to undergo such procedures during the clinical investigation (cohort 2) * Facial lipolysis, including submental fat treatments within last month prior to enrollment or planned during the clinical investigation (cohort 2) * Bariatric surgery within 12 months prior to enrollment or planned during the clinical investigation (cohort 2) * Planned dental/ oral surgery or modification within two weeks prior to injection and to a minimum of four weeks post injection (cohort 2)