The effects of preservation methods on homologous incus transplants in cats.

Experimental incus transplants were performed in cats. The gross findings and histologic data were recorded and correlated to the use of four preservation methods for homografts (alcohol, Cialit, formalin, and freezing). The formalin preserved incudes produced the least middle ear reaction and ossicular fixation. These incudes also exhibited a uniform perivascular bone remodeling throughout the homograft while the bones preserved in Cialit and alcohol were replaced much faster and ossicular chain fixation occurred. The incus bones preserved by freezing were better tolerated than the Cialit and alcohol ones but not as well as the formalin ones.