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Hydroxyapatite orbital implants--our local experience

K S Fong1, C T Choo

  • 1Singapore National Eye Centre, Singapore.

Annals of the Academy of Medicine, Singapore
|July 1, 1997
PubMed
Summary
This summary is machine-generated.

Hydroxyapatite orbital implants offer excellent biocompatibility and motility for anophthalmic sockets. This study found low complication rates, with no infections or migration in patients receiving these implants.

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Area of Science:

  • Ophthalmology
  • Biomaterials Science
  • Surgical Implants

Background:

  • Hydroxyapatite orbital implants, introduced in 1985 and FDA-approved in 1989, are valued for biocompatibility and improved motility.
  • They have become a popular choice for orbital reconstruction after enucleation or evisceration.

Purpose of the Study:

  • To evaluate the safety and efficacy of hydroxyapatite orbital implants in patients at the Singapore National Eye Centre.
  • To assess complication rates including infection, extrusion, and migration.

Main Methods:

  • Retrospective analysis of 17 consecutive patients who underwent hydroxyapatite orbital implantation between June 1993 and June 1996.
  • Patients received either 18 or 20 mm implants (coralline or artificial hydroxyapatite) for primary or secondary placement.
  • Follow-up duration was a minimum of 6 months.

Main Results:

  • No cases of infection, extrusion, or migration were observed in the 17 analyzed patients over a mean follow-up of 10.2 months.
  • Two patients experienced implant exposure, successfully managed with fascia lata grafts.
  • The study highlights the integration of hydroxyapatite implants with host tissues, reducing migration and extrusion risks.

Conclusions:

  • Hydroxyapatite orbital implants are a safe and effective option for an anophthalmic socket, demonstrating a low complication profile.
  • The biomaterial's integration with surrounding tissues contributes to implant stability and patient satisfaction.
  • Surgical management for rare complications like implant exposure is feasible and effective.