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Related Experiment Videos

Why do some epikeratoplasties fail?

P S Binder, E Y Zavala

    Archives of Ophthalmology (Chicago, Ill. : 1960)
    |January 1, 1987
    PubMed
    Summary
    This summary is machine-generated.

    Morphologic analysis of epikeratoplasty lenticules revealed structural abnormalities in all layers, particularly the epithelium and Bowman's layer. Tissue preparation methods may negatively impact donor lenticule structure and corneal reepithelialization.

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    Area of Science:

    • Ophthalmology
    • Corneal Surgery
    • Tissue Engineering

    Background:

    • Epikeratoplasty involves grafting donor lenticules to the cornea.
    • Complications include nonhealing epithelial defects and haze.
    • Understanding donor lenticule structure is crucial for surgical success.

    Observation:

    • Nine explanted epikeratoplasty lenticules were analyzed morphologically.
    • Structural abnormalities were identified in all lenticule layers.
    • Key changes were observed in the surface epithelium and Bowman's layer.

    Findings:

    • Significant alterations in stromal collagen were documented.
    • Similar structural changes were noted in previously analyzed, factory-prepared lenticules.
    • Current tissue preparation methods, including corneal pressing and lyophilization, may compromise lenticule integrity.

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    Implications:

    • Tissue preparation processes may be detrimental to donor lenticule structure.
    • Compromised lenticule structure could adversely affect corneal reepithelialization.
    • Lenticule placement relative to the recipient's Bowman layer may also impede postoperative healing.