Repeated human tooth allograft after a previous rejection.

A case has been presented in which a humantooth allograft was performed. It failed in a reasonably expected manner. Another tooth allograft from the same donor to the same host was then performed. It is currently functioning two years postoperatively. This seems to defy the law of second-set reaction. Various explanations for the response to this repeated tooth allograft have been discussed. It is concluded that possibility of repeating tooth allografts, even after a first allograft has failed, should be considered.