title: [Gel and porous polyethylene implants in the rabbit anophthalmic cavity].
abstract: OBJECTIVE
  To evaluate porous polyethylene implants as compared to solid and gel spheres in anophthalmic cavities.
  
  
  METHODS
  Thirty-six white rabbits underwent a right eye enucleation with placement of 12 mm of porous (18 animals) or gel (18 animals) polyethylene spheres. The animals were submitted to weekly clinical evaluation. Ultrasound examinations were done 30, 60 and 90 days after surgery and the animals were sacrificed on the day 90th. Then, the orbit content was removed and submitted to light microscopy.
  
  
  RESULTS
  Five animals (27.2%) which received porous polyethylene spheres presented sphere extrusion. With the gel polyethylene spheres, the extrusions happened in 94.4% of the animals and it was observed that the expelled gel spheres had higher diameter then the implanted ones. Ultrasound evaluation showed that the porous polyethylene implant becomes vascularized but the gel not, as confirmed by histological examination.
  
  
  CONCLUSIONS
  Spheres of material in the gel state hydrate and increase in volume making it necessary to know the final size before the implantation. Ultrasound examination allows the evaluation of the implant-tissue integration.
authors.affiliation: Faculdade de Medicina, Universidade Estadual Paulista Julio Mesquita Filho, Botucatu, SP, Brazil.
authors.forename: Lucieni Cristina Barbarini
authors.initials: LC
authors.lastname: Ferraz
authors.forename: Silvana Artioli
authors.initials: SA
authors.lastname: Schellini
authors.forename: Sheila Lordelo
authors.initials: SL
authors.lastname: Wludarski
authors.forename: Carlos Roberto
authors.initials: CR
authors.lastname: Padovani
mesh_terms: D000818:Animals; D015353:Eye Enucleation; D005549:Foreign-Body Reaction / Q000000981:diagnostic imaging* / Q000473:pathology; D005782:Gels; D018919:Neovascularization, Physiologic; D020273:Orbital Implants; D011095:Polyethylenes; D016062:Porosity; D011817:Rabbits; D013997:Time Factors; D014463:Ultrasonography
chemical_list: D005782:Gels; D011095:Polyethylenes