Hyogo ear bank experience with allograft tympanoplasty--review of tympanoplasties on 68 ears.

Allograft tympanoplasties on 68 ears done between October, 1980 and December, 1986 were analyzed from the viewpoint of graft take rate and hearing improvement, and also the results were compared between draining and nondraining ears as well as among three stabilizing methods of the transplanted tympanic membrane (Type I: allograft tympanic membrane (ATM) covered with reflected epithelium; Type II: entirely covered ATM with fascia; and Type III: ATM reinforced with thin crescent fascia) and four groups of allograft materials (Group I: ATM with attached malleus and incus en bloc; Group II: ATM with attached malleus; Group III: ATM attached malleus and incus columella; and Group IV: two stage surgery with Group III material)