title: Multicenter study of the efficacy and safety of subcutaneous non-animal-stabilized hyaluronic acid in aesthetic facial contouring: interim report.
abstract: BACKGROUND
  Non-animal-stabilized hyaluronic acid (NASHA) gel may offer longer-lasting cosmetic correction and lower antigenic risk than other soft tissue augmentation agents.
  
  
  OBJECTIVE
  To assess the efficacy and safety of the NASHA gel Restylane SubQ (Q-Med AB, Uppsala, Sweden) in aesthetic facial contouring.
  
  
  METHODS
  Fifty-seven adult patients seeking cheek and/or chin augmentation received subcutaneous and/or supraperiostal injections of Restylane SubQ (20 mg/mL) at 114 treatment sites; 13 of these patients received "touch-up" injections at 20 sites. Efficacy was assessed subjectively using a 5-grade Global Aesthetic Improvement Scale at 1, 3, 6, 9, and 12 months after the initial treatment.
  
  
  RESULTS
  At 3 months post-baseline, patients and investigators independently considered the treatment sites to be improved in 96.4% and 100% of cases, respectively. Patient- and investigator-assessed response rates (proportion of patients showing moderate or better improvement) were 84% and 95%, respectively. The majority of reported adverse events were treatment related (local injection-site reactions, implantation complications, skin tightness, and skin induration), but these were generally of mild intensity and short-lived.
  
  
  CONCLUSIONS
  Restylane SubQ is well tolerated and maintains aesthetic correction of the cheeks and chin for at least 3 months after subcutaneous and/or supraperiostal treatment.
authors.affiliation: The DeLorenzi Clinic, Kitchener, Ontario, Canada. delorenzi@golden.net
authors.forename: Claudio
authors.initials: C
authors.lastname: DeLorenzi
authors.forename: Michael
authors.initials: M
authors.lastname: Weinberg
authors.forename: Nowell
authors.initials: N
authors.lastname: Solish
authors.forename: Arthur
authors.initials: A
authors.lastname: Swift
mesh_terms: D000328:Adult; D000368:Aged; D001672:Biocompatible Materials / Q000008:administration & dosage*; D003357:Cosmetic Techniques; D005145:Face; D005260:Female; D005500:Follow-Up Studies; D005782:Gels; D006801:Humans; D006820:Hyaluronic Acid / Q000008:administration & dosage / Q000031:analogs & derivatives*; D007279:Injections, Subcutaneous; D008297:Male; D008875:Middle Aged; D011446:Prospective Studies; D015595:Skin Aging / Q000187:drug effects*; D016896:Treatment Outcome
chemical_list: D001672:Biocompatible Materials; D005782:Gels; D006820:Hyaluronic Acid; C445361:Restylane