Changing the geometry of polymer spherical orbital implants

Abstract

BACKGROUND: Over the past decades, various polymer implants have been actively used in the rehabilitation of patients with anophthalmos to form a volumetric support stump and improve the results of cosmetic prosthetics.
 AIM: To assess clinical symptoms and features of the X-ray picture in patients with anophthalmos after implantation of polymeric spherical endoprostheses with a modified geometry.
 MATERIALS AND METHODS: The study is based on the analysis of 30 patients with anophthalmos after enucleations (23) and eviscerations (7) performed using various methods of procedure and insertion into tissues of an implant made of domestic polytetrafluoroethylene. All patients underwent a multispiral computed tomography (MSCT) of the eye sockets according to the same algorithm.
 RESULTS: On the basis of the performed studies, the fact of making a change in the geometry of the implanted spherical implants was revealed, while the parameters of the modified part of the spheres were different and ranged from 14 to 18 mm of final diameters with the initial diameters of the spheres ranging from 18 to 20 mm. A decrease in the volume of spheres with modified geometry from 0.114 to 0.651 cm3 was revealed with initial diameters ranging from 18 to 20 mm.
 CONCLUSIONS: Changes in the geometry of the orbital spheres do not improve the results of cosmetic prosthetics in patients, increase the percentage of implant exposure at different times after surgery, and increase the manifestations of anophthalmic syndrome.