[Histological study of otological homografts (incus, cartilage and fascia) (author's transl)].

To summarise our morphological findings of this study the following conclusions are drawn: In bone grafts growth of vital cells originating from the Haversian canals is clearly demonstrated. The growth of connective tissue in the Haversian system is understandable on general principles of pathology. The morphology of the change of osteocytes from fibrocytes through osteoblasts is photographically clearly shown and is in keeping with the findings of Steinbach and of Kerr and Smyth. New bone formation was detected at earliest nine months after implantation. Our investigations do not confirm whether this new bone formation occurs persistently in all cases or to what extent the original homograft material, preserves in cialit solution, takes part in this process. A similar mechanism of tissue regrowth should be accepted in homograft cartilage. We have studied two cases, one after 6 months and the other after 5 years following implant. The three fascial grafts examined compare with earlier publications, with oedema, slight inflammation and little shrinkage occurring. The suitability for grafting of homograft incus, cartilage and fascia we believe to have been demonstrated.