PRIMARY ORBITAL IMPLANT LUXATION - A RETR OSPECTIVE STUDY

Background: To compensate the orbital volume deficit after enucleation orbital implants are used. Method: Between 1986 and 1996, 449 enuclea tions were performed. One hundred and fifty-five orbital implants were used: 96 hydroxylapatite-ceramic-silicon (HAK-silicon), 29 hydroxylap atite-ceramic (HAK), 26 Kiel bone chips, 3 Walser and 1 Bangerter impl ant. Results: Ten orbital implants (6.45 %) had to be explanted. Seven of the 96 HAK-silicon implants were explanted: four could be changed, two of them with a smaller and two with a same diameter. We observed a complication rate of 7.29 % and a rate of total loss of 3.13 %. One luxated HAK-implant could be refixated (3.45 %), and one implant (3.85 %) of the Kiel bone chip implants was explanted. Conclusion: Using di fferent types of orbital implants after enucleation, we observed a com plication rate of 7 %. However, to avoid the post-enucleation-syndrome and to achieve better motility of the prosthesis,orbital implants sho uld be used.