title: Silicone-Polytetrafluoroethylene Composite Implants for Asian Rhinoplasty.
abstract: BACKGROUND
  Silicone and Gore-Tex implants are mainstays of Asian rhinoplasty. Silicone implants are inexpensive and wieldy, but may elicit a foreign-body reaction and are prone to migration. Gore-Tex implants are more biocompatible and capable of ingrowth but expensive. Silicone-polytetrafluoroethylene (PTFE) composites have a silicone core and PTFE liner. Composite implants have been marketed for several years, but are not yet established alternatives for rhinoplasty because of a lack of relevant reports.
  
  
  METHODS
  From February 2012 to June 2015, 177 Asian patients underwent primary (n = 63) or secondary (n = 114) rhinoplasty using an I-shaped composite implant. One hundred fifty-nine women and 18 men were 19 to 72 years old (mean, 34 years) at the time of surgery. Composite implants were 1.5 to 5 mm thick and 3.8 to 4.5 cm long. Autologous cartilage from the septum, concha, or both was used for tip refinement in every case. Glabellar augmentation was performed in 19 (10.7%) cases.
  
  
  RESULTS
  Follow-up was 6.0 months (range, 1-36 months). There were 19 (10.7%) complications including malposition/deviation (4.5%), erythema (2.3%), and infection (1.1%). Four patients were unsatisfied, citing inadequate dorsal height correction. There was an 8.8% revision rate; 7 of 12 revisions were for malposition/deviation. We did not observe implant step-offs or extrusion. There were no differences in outcomes after primary or secondary rhinoplasty, although there was a trend toward higher infection rate after primary rhinoplasty (P = 0.06).
  
  
  CONCLUSIONS
  I-shaped silicone-PTFE composite implants are feasible for both primary and secondary augmentation rhinoplasty in Asians. Early outcomes data suggest an overall complication rate that is comparable to PTFE alone.
authors.affiliation: From the *Finesse Plastic Surgery, Orange, CA; †Department of Plastic and Reconstructive Surgery, Ulsan University College of Medicine, Asan Medical Center, Seoul, Korea; and ‡Department of Plastic and Reconstructive Surgery, Chang Gung Memorial Hospital, College of Medicine, Chang Gung University, Taipei, Taiwan.
authors.forename: Jonathan A
authors.initials: JA
authors.lastname: Zelken
authors.forename: Joon Pio
authors.initials: JP
authors.lastname: Hong
authors.forename: Chun-Shin
authors.initials: CS
authors.lastname: Chang
authors.forename: Yen-Chang
authors.initials: YC
authors.lastname: Hsiao
mesh_terms: D000328:Adult; D000368:Aged; D044466:Asian People; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008297:Male; D008875:Middle Aged; D017063:Outcome Assessment, Health Care; D011138:Polytetrafluoroethylene; D019736:Prostheses and Implants; D012225:Rhinoplasty / Q000295:instrumentation*; D012828:Silicones
chemical_list: D012828:Silicones; C050905:polytetrafluoroethylene-silicone; D011138:Polytetrafluoroethylene