An operation to graft the<unk>  is undertaken in severe pemphigoid, chemical burns, Stevens–Johnson syndrome, trachoma, Lyell syndrome and multiple corneal graft failure. There is a significant risk of anatomical failure of lamina in the long term, estimated at about 19% in a small study, with the main risks being laminar resorption, particularly in allografts, and glaucoma. Another, bigger study comparing<unk>  with the lesser known<unk><unk>  (OKP) in 145 and 82 patients and follow-up terms up to 10 years yielded the following statistics: * 10-year anatomical survival: 66% for<unk>  and 47% for OKP * 2-year functional survival: 63% for<unk>  and 49% for OKP * 10-year functional survival: 38% for<unk>  and 17% for OKP with functional survival defined as best corrected visual acuity above 0.05. Another long-term study of 181 patients puts the chances of retaining an intact<unk>  after 18 years at 85%.
Osteo-odonto-keratoprosthesis
Femoral head ostectomy
Periradicular surgery
Triple arthrodesis
Scleral buckle
Hip resurfacing
Carpal tunnel surgery
Cortical implant