title: Thygeson lecture. Amniotic membrane transplantation: why is it effective?
abstract: OBJECTIVE
  To review the uses and previously proposed mechanisms of action of amniotic membrane transplantation (AMT) and to suggest a new mechanism of action for the effectiveness of AMT in resolving a persistent epithelial defect (PED).
  
  
  METHODS
  Significant clinical and experimental publications are reviewed.
  
  
  RESULTS
  Evidence from the scientific literature suggests a new hypothesis for the effectiveness of AMT in the reepithelialization of a PED and the reduction of corneal stromal inflammation and continued fibrosis.
  
  
  CONCLUSIONS
  It is suggested that reepithelialization of a PED, and hence the reduction of stromal inflammation and continued fibrosis following reepithelialization, is aided by the combination of oxygenation, moisture and protection of the fragile epithelium by the amniotic membrane.
authors.affiliation: julebaum@massmed.org
authors.forename: Jules
authors.initials: J
authors.lastname: Baum
mesh_terms: D000650:Amnion / Q000637:transplantation*; D001684:Biological Dressings / Q000266:history; D003316:Corneal Diseases / Q000266:history / Q000601:surgery*; D049673:History, 20th Century; D009885:Ophthalmology / Q000266:history