PURPOSE: We examined the histopathologic fea tures of two hydroxyapati
te orbital implants that were removed from two patients, METHODS: Two
surgically removed hydroxyapatite orbital implants were decalcified an
d processed for routine light microscopic examination. RESULTS: Both i
mplants demonstrated fibrovascular ingrowth and foci of bone formation
, CONCLUSION: Bone may form in hydroxyapatite orbital implants.