Comparison of Fibrovascular Ingrowth into Hydroxyapatite and Porous Polyethylene Orbital Implants

Two porous orbital implants available for clinical use in the anophthalmic socket are hydroxyapatite (HA) and porous polyethylene (PP). We examined the rate and the extent of fibrovascular ingrowth into these implants using histopathologic criteria in a rabbit model. Thirty-two New Zealand white rabbits underwent a unilateral enucleation with placement of a 14-mm spherical orbital implant. Twelve rabbits received HA, 12 small-pore PP, and 8...