The present invention relates to a central body said anchor (1) of revolution adapted to be implanted in a hole made in a bone of a patient, and an implant collar (7) integral with the anchoring body (1) adapted to receive a prosthetic system, remarkable in that the anchoring body (1) has a first generally apical apical portion (2) flaring from its lower end and a second substantially upper frustoconical portion (3) extending the apical apical portion (2) and narrowing from the upper end of the apical portion (2) which has a diameter di to its upper end which has a diameter d and that the base of the implant neck (7) has a diameter d less than the diameter d of the upper end of the apical part (2) and the diameter d of the frustoconical upper end (3) of the anchoring body (1) so that the ratio d / d is greater orequal to 1.15, the ratio di / d is greater than or equal to 1.5 and the ratio d / d is greater than or equal to 1.3 in order to form an annular flat (8) between the upper end of the part frustoconical upper end (3) of the anchoring body (1) and the base of the implant neck (7) and, the annular flattening (8) being positioned under the bony crest of the patient's jaw during implant placement, to create a gap between the implant neck (7) and the bone wall in which an exudate of blood and bone particles can expand, said space being optionally filled with a bone filling material.La présente invention concerne un comportant un corps central dit d'ancrage (1) de révolution apte à être implanté dans un trou pratiqué dans un os d'un patient, et un col implantaire (7) solidaire du corps d'ancrage (1) apte à recevoir un système prothétique, remarquable en ce que le corps d'ancrage (1) présente une première partie dite apicale (2) globalement conique s'évasant depuis son extrémité inférieure et une seconde partie dite supérieure (3) sensiblement tronconique prolongeant la partie apicale conique (2) et rétrécissant depuis l'extrémité supérieure de la partie apicale (2)
