Za. Karcioglu et al., POROUS POLYETHYLENE ORBITAL IMPLANT IN PATIENTS WITH RETINOBLASTOMA, Ophthalmology (Rochester, Minn.), 105(7), 1998, pp. 1311-1316
Objective: The purpose of the study was to assess integration of porou
s polyethylene allografts in 37 anophthalmic sockets of retinoblastoma
enucleations, Design: A clinical review. Participants: Thirty-four pa
tients (19 female, 15 male) whose age when diagnosed with retinoblasto
ma ranged from 1 to 72 months participated. Sixteen patients had unila
teral retinoblastoma and 18 had bilateral retinoblastoma. Intervention
: Enucleation (3 bilateral, 31 unilateral) with implantation of a poro
us polyethylene (PP) sphere (16-20 mm in diameter) was performed. Of t
he 37 spheres, 34 were primary implants and 3 were secondary implants.
In the eight patients with postimplantation exposure, the PP implant
had to be removed. Main Outcome Measures: Data on eight sockets with e
xposed PP implant were measured. Results: There were no implant extrus
ions, but conjunctival dehiscence-exposure occurred in eight patients
(21.6%), In 3 of 37 sockets, the volume replacement was not good, and
in 5 cases, fornices were too shallow to accommodate a well-fitting pr
osthesis. In all but one socket, the overall cosmesis was graded subje
ctively from acceptable (grade 2) to excellent (grade 3), Conclusions:
Although the PP implant is a useful and a less-expensive alternative
to hydroxyapatite in the porous matrix implant category, if conjunctiv
al exposure takes place, the implant presents a serious management pro
blem because of its nonresponsiveness to medical and surgical treatmen
ts.