The treatment of a certain number of children with very severe dentomaxillary sequelae after radiotherapy for facial and intracranial lesions raises many problems. These include the type of reconstructive therapy, the protection of the maxillodental structures, the value of local and alimentary hygiene, and the quantity and quality of dental treatment needed. Further difficulties are encountered because of dental malformations (absence of roots), increased rate of eruption of the teeth in the arch (contrary to the accepted opinions), and objectives should be modest when attempting maxillofacial orthopedic procedures.