title: A randomized, evaluator-blind, multicenter comparison of the efficacy and tolerability of Perlane versus Zyplast in the correction of nasolabial folds.
abstract: Bovine collagen is widely used as a dermal filler for facial soft-tissue augmentation, but it provides only temporary cosmetic improvement. Nonanimal stabilized hyaluronic acid has reduced potential for immunogenicity and hypersensitivity and may provide a more durable aesthetic result. Sixty-eight patients with prominent nasolabial folds were randomized to intradermal treatment with nonanimal stabilized hyaluronic acid gel (Perlane) and bovine collagen (Zyplast) on contralateral sides of the face. On achievement of "optimal cosmetic result" (baseline), patients were followed up for 6 months; bilateral retreatment with Perlane was offered at 6 or 9 months after baseline. Responses were evaluated at 2, 4, 6, 9, and 12 months after baseline. Investigator-based and patient-based ratings indicated that Perlane was more effective than Zyplast in maintaining cosmetic correction. According to investigator-based Wrinkle Severity Rating Scale assessments at 6 and 9 months after baseline, Perlane was superior in 50.0 percent and 48.8 percent of patients, respectively, whereas Zyplast was superior in 10.3 percent and 14.0 percent of patients, respectively (p < 0.0004). Investigator-based Global Aesthetic Improvement Scale assessment at 9 months after baseline indicated that Perlane was superior in 48.8 percent of patients, whereas Zyplast was superior in 14.0 percent of patients (p = 0.0025). "Optimal cosmetic result" was achieved with a smaller volume of Perlane than Zyplast (mean, 1.2 ml versus 2.1 ml). Local injection-site reactions (redness, swelling, pruritus, and induration) were less frequent with Perlane than with Zyplast. Delayed-onset reactions were rare and did not reoccur after Perlane retreatment. Perlane has acceptable long-term safety and offers a longer-lasting aesthetic improvement than Zyplast.
authors.affiliation: Göteborgs Plastikkirurgiska Center, KB, Göteborg, Sweden. lindqvist.c@goteborg.mail.telia.com
authors.forename: Christer
authors.initials: C
authors.lastname: Lindqvist
authors.forename: Stein
authors.initials: S
authors.lastname: Tveten
authors.forename: Bjørn Eriksen
authors.initials: BE
authors.lastname: Bondevik
authors.forename: Dan
authors.initials: D
authors.lastname: Fagrell
mesh_terms: D000328:Adult; D000368:Aged; D000818:Animals; D001672:Biocompatible Materials / Q000008:administration & dosage / Q000009:adverse effects / Q000627:therapeutic use*; D002417:Cattle; D003094:Collagen / Q000008:administration & dosage / Q000009:adverse effects / Q000627:therapeutic use*; D003357:Cosmetic Techniques; D004311:Double-Blind Method; D004890:Erythema / Q000139:chemically induced; D004954:Esthetics; D005260:Female; D005782:Gels; D006801:Humans; D006820:Hyaluronic Acid / Q000008:administration & dosage / Q000009:adverse effects / Q000627:therapeutic use*; D007271:Injections, Intradermal; D008297:Male; D008875:Middle Aged; D011537:Pruritus / Q000139:chemically induced; D012008:Recurrence; D015595:Skin Aging; D013997:Time Factors
chemical_list: D001672:Biocompatible Materials; D005782:Gels; C502935:Perlane; C048470:glutaraldehyde-cross-linked collagen; D006820:Hyaluronic Acid; D003094:Collagen