[Histologic changes in human periodontal tissue after transplantation of teeth with completely formed roots]

Authors present the histological evolution of the periodontal tissues after complete-root teeth transplantation in human. They point out that there is a great distinction between the histological and clinical results. It is difficult to obtain the neoformation of a normal periodontal ligament. In spite of the histological failure, they obtained a good clinical result: there fore the complete-root tooth transplantation must be considered an acceptable surgical procedure.