同種軟骨板の中耳内移植後の運命

抄録

In a study of the fate of homograft cartilages implanted into the middle ear, the transplanted cartilages removed at revision surgery or at the second stage of staged tympanoplasty were examined histologically. The appearance and shape of the cartilages remained unchanged without any evidence of erosion. There was no foreign body reaction or rejection phenomenon. No marked changes were seen in the matrix, but the chondrocytes showed degenerative changes. There was partial absorption of the cartilage and replacement by fibrous tissue when inflammatory changes were present in the middle ear. It is concluded that implanted homograft cartilage can be expected to maintain its stiffness for a long time in healthy, aerated middle ears.