[Long-term results of the compatibility of a coralline hydroxyapatite implant as eye replacement].
Coralline hydroxyapatite has been used since 1983 as volume replacement. Through 2001, a total of 200 hydroxyapatite implants were used in our department.



This prospective study was undertaken to measure the subjective and objective long-term tolerance of this implant.



In 2012, a total of 20 patients were examined, who were enucleated or eviscerated between 1993 and 2001 (average follow-up 16.2 years) and had an hydroxyapatite implant placed with a scleral sheath. We evaluated the subjective tolerance and measured the motility, the prominence of the globe, lid positions, changes of the conjunctiva and postoperative complications.



The subjective long-term tolerance was reported to be good. All patients had a ptosis; an ectropion was found in 50% of patients. In 40% of the patients additional surgery was performed. The motility was better in primary than in secondary placed implants. Volume replacement was successful in 10 patients, 9 patients had a retraction and 1 patient a prominent prosthesis.



Hydroxyapatite implants with sclera sheathing were well tolerated and showed good motility on long-term follow-up over more than 16 years. Lid malpositions such as ptosis or ectropion are common but might be due to mechanical stress through the prosthesis and atrophy of the orbital fat.
Augenklinik Hagen, St. Josefs Hospital, Kath. Krankenhaus Hagen gem. GmbH, Dreieckstr. 17, 58097, Hagen, Deutschland. thiesmannr@kkh-hagen.de.
R
R
Thiesmann
Augenklinik Hagen, St. Josefs Hospital, Kath. Krankenhaus Hagen gem. GmbH, Dreieckstr. 17, 58097, Hagen, Deutschland.
A
A
Anagnostopoulos
Augenklinik, Asklepios Klinik Barmbek, Hamburg, Deutschland.
B
B
Stemplewitz
D002516:Ceramics; D015353:Eye Enucleation; D006801:Humans; D006882:Hydroxyapatites; D020273:Orbital Implants; D011446:Prospective Studies; D019736:Prostheses and Implants
D006882:Hydroxyapatites; C119955:coralline hydroxyapatite
Anophthalmus; Compatibility; Hydroxyapatite orbital implant; Long-term results; Motility