Purpose: The objective of the mandibular reconstruction after resection surgery is to restore the aesthetics by an osseous support for the soft tissue but also and especially to restore the functions of chewing and deglutition by stabilizing the native mandibular sector and the bone in the resection area.Methods: The surgery of reconstruction by fibula has to lean and be guided by the prosthetic project,the only guarantee for the good positioning of the implants and of osseous transplant.For that,it is necessary to digitize simulated.