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Fate of auricular transplants and repair of auricular gaps in the grivet monkey (Cercopithecus aethiops aethiops).

The bulk of clinical and experimental evidence is in favour of the survival and growth of autogenous cartilage transplants (Dupertuis, 1941; Peer, 1955; Depalma et al. 1963; Stoll & Furans, 1970). Homografts of cartilage between members of a highly inbred strain were equally successful (Lutfi, 1970). In animals which are not so closely related genetically the general opinion is that cartilage homografts survive for a very much longer time than homografts of other tissues (Young & Rochester, 1941; Blackdahl, Consiglio & Falconer, 1955; Campbell et al. 1963) except cornea (Peer, 1955) and may well persist indefinitely (Wagenfeld, 1952). All these authors are agreed that the antigenicity of cartilage homografts is extremely feeble and that any homograft reaction thereby induced is very slight. Clinical observations have shown that a maternal ear homograft retains its structure as a support for the auricle (Gillies, 1937, 1942; Mowlem, 1941) and that chondrocytes have survived for more than 18 years in homografts (Gibson, Davies & Curran, 1958; Billingham & Silvers, 1971). On the other hand some workers have found that fresh human homografts not only fail to grow, but are sooner or later resorbed (Peer, 1955). Experimental work has been carried out in the past on rabbits, rats, guinea-pigs, dogs, and chickens, but not on primates. In the present work the fate of autoand homo-transplants of auricular cartilage, and the mode of repair of auricular gaps, have been studied in the grivet monkey.