title: High density porous polyethylene material (Medpor) as an unwrapped orbital implant.
abstract: OBJECTIVE
  To introduce the clinical effect among patients who received an unwrapped orbital implant with high density porous polyethylene material (Medpor) after enucleation or evisceration.
  
  
  METHODS
  Retrospective analysis of a series of 302 patients with anophthalmia who underwent placement of an unwrapped high density porous polyethylene orbital implant. We compared the patients (n=180) who accepted primary implant placement with those (n=122) who accepted secondary implant placement. Parameters evaluated included: age at time of surgery, date of surgery, sex, implant type and size, surgery type, the surgical procedure and technique performed, and complications.
  
  
  RESULTS
  The time of follow-up ranged from 2.0 to 58.0 months (mean 32.5 months). A total of 5 of 302 (1.66%) cases had documented postoperative complications. The following problems were noted after surgery: implant exposure, 3 patients (0.99%); implant removed due to orbital infection, 1 patient (0.34%); ptosis, 1 patient (0.34%). There were no significant complications observed in other 297 cases and all implants showed good orbital motility. The clinical effect of primary implant placement is better than that of secondary placement.
  
  
  CONCLUSIONS
  High density porous polyethylene material can be used successfully as an unwrapped orbital implant in anopthalmic socket surgery with minimal complications. The material is well tolerated, nonantigenic and has low rate of infection and migration.
authors.affiliation: Department of Eye Center, First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou 310015, China.
authors.forename: Yan-hong
authors.initials: YH
authors.lastname: Chen
authors.forename: Hong-guang
authors.initials: HG
authors.lastname: Cui
mesh_terms: D000293:Adolescent; D000328:Adult; D001672:Biocompatible Materials; D002648:Child; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008297:Male; D008875:Middle Aged; D020273:Orbital Implants; D011095:Polyethylenes; D019919:Prosthesis Implantation; D012189:Retrospective Studies
chemical_list: D001672:Biocompatible Materials; C084562:Medpor; D011095:Polyethylenes