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Postoperative rotation of hydroxyapatite enucleation implants
1Department of Ophthalmology and Visual Sciences, Washington University, St Louis, MO, USA.
Archives of Ophthalmology (Chicago, Ill. : 1960)
|November 24, 1999
Summary
Postoperative rotation of flattened hydroxyapatite implants can occur late after enucleation. This complication is more common in patients with strabismus, suggesting modified implants should be avoided in this group.
Area of Science:
- Ophthalmology
- Biomaterials Science
Background:
- Hydroxyapatite implants are used for orbital reconstruction after enucleation.
- Flattened hydroxyapatite implants are a modification aimed at improving outcomes.
Purpose of the Study:
- To determine the incidence and severity of postoperative rotation in flattened hydroxyapatite enucleation implants.
Main Methods:
- Retrospective review of 16 patients who received flattened hydroxyapatite enucleation implants.
- Assessment of implant misalignment and its clinical significance.
Main Results:
- Five of 16 patients (31.25%) experienced implant rotation between 11 and 60.3 months post-enucleation.
- Two cases had mild, clinically insignificant malposition.
- Three cases had marked misalignment, potentially significant if motility pegs were used.
Conclusions:
- Flattened hydroxyapatite implants may undergo late postoperative rotation.
- Preexisting strabismus is a risk factor for this complication, contraindicating implant modification.