Clinical Evaluation of Medpor(r) Orbital Implant

ABSTRACT

Recently the high-density porous polyethylene[Medpor(r)]has been used as a new orbital implant for the reconstruction after enucleation or evisceration to reduce the implant exposure and migration, and to increase the prosthesis motility. We performed 16 cases of Medpor(r) orbital implantation combined with enucleation, evisceration or secondary orbital implantation between November 1997 and December 1998. Then, we investigated the postoperative complication, prosthesis motility, fibrovascular ingrowth pattern into the implant and MCP[Medpor(r) Coupling Post]insertion to increase the prosthesis motility for the average of 10 months [range, 6 to 18 months]. We performed a total of 16 cases of implantation10 cases after evisceration, 5 cases after enucleation and 1 case as secondary implantation. There were 3 cases of conjunctival dehiscence, 1 case of retrobulbar hemorrhage and 1 case of superior sulcus deformity. There were no implant exposure, migration or severe inflammation. Postoperative prosthesis motility was found in 13 cases as good, 2 cases as fair and 1 case as poor. After enucleation or evisceration, Medpor(r) orbital implantation showed no significant difference from the previous porous orbital implants in postoper ative complication, prosthesis motility and fibrovascular ingrowth into the implant. It appears to be a good orbital implant because of the lower material cost, convenience in the operative procedure and other advantages. But long-term follow-up may be necessary for the detection of clinical change, the complication of MCP insertion and for the evaluation of the fibrovascular ingrowth pattern after Medpor(r) implantation.