Comparison of complication rates of porous anophthalmic orbital implants.

BACKGROUND AND OBJECTIVE: Porous anophthalmic orbital implants are used widely. This study evaluates risk factors for porous anophthalmic orbital implant complications and compares complication rates of hydroxyapatite, porous polyethylene, and polyglactin mesh-wrapped aluminum oxide implants. PATIENTS AND METHODS: The records of 105 patients (110 eyes) who received porous anophthalmic orbital implants for any indication were reviewed retrospectively. Complications were recorded and correlated with potential risk factors, including implant material. All patient records were de-identified to protect privacy. RESULTS: Porous polyethylene and aluminum oxide implants were associated with higher exposure rates (porous polyethylene: odds ratio 6.1 [1.29, 29.1]; aluminum oxide: odds ratio 6.0 [1.58, 23.1]; P = .004) and higher overall complication rates compared to hydroxyapatite implants. CONCLUSION: Implant material may be a risk factor for several anophthalmic clinical outcomes.

Infected aluminum oxide orbital implant.

Porous orbital implant infection is rare. The diagnosis may be delayed as the initial symptoms and signs are not always indicative of implant infection. It is often only with time, a persistence of symptoms and signs, and additional symptoms and signs that implant infection is suspected.

[Semiconductor low level laser irradiation for exposure of hydroxyapatite orbital implants].

OBJECTIVE: To evaluate the efficacy of semiconductor low level laser irradiation for the treatment of postoperative exposure of hydroxyapatite orbital implants. METHODS: 22 cases with postoperative exposure of hydroxyapatite orbital implants were divided into three groups according to the size of implants exposure. The exposure wound in the 3 groups was irradated with semiconductor low level laser 5 min per day for 5-15 days. The follow-up period ranged from 2 to 24 months. RESULTS: In the group with less then 3 mm of exposure, the wound healed in 1 week after 5-10 days irradiation; in the group with implant exposure of 4-7 mm, the would healed in 1-2 weeks after 10-15 days irradiation; in the group with implant exposure of 8-10 mm, the would healed in 2-3 weeks after 10-15 days irradiation. Compared with the treatments of drugs and/or surgical repair, which was used for another 20 cases of exposure of hydroxyapatite orbital implants, semiconductor low level laser increased healing rate obviously in the groups with implant exposure of 4-7 mm and 8-10 mm (P = 0.019, 0.018). CONCLUSION: Semiconductor low level laser has better effects than drugs and/or surgical repair for exposure of hydroxyapatite orbital implants.

[Biocompatibility of a porous alumina orbital implant. Preliminary results of an animal experiment]. / Biocompatibilité dans la cavité orbitaire d'une bille en alumine poreuse. Résultats préliminaires de l'expérimentation animale.

PURPOSE: Evaluation of clinical tolerance and scanning electron microscopy study of the bio-colonisation of a porous ceramical alumina implant after evisceration of the rabbit. Preliminary results. METHODS: Sixteen white New Zealand rabbits were eviscerated. A porous hydroxyde alumina ball was implanted in the opened sclera and explanted 15, 30, and 90 days after implantation. Clinical tolerance was assessed and implant tissular ingrowth was analyzed by scanning electron microscopy. RESULTS: One infection was observed and there was no conjunctival breakdown. Fibrovascular ingrowth occurred as soon as 15 days after implantation, and was full at one month. CONCLUSION: Porous alumina implant orbital tissue tolerance and fast fibrovascular ingrowth in the rabbit socket suggest promising result in the human anophthalmic socket.