This post (1) comprises: a body (11) of biocompatible and radiologically visible material, a threaded shank (12) for being attached to a dental implant (2), and an open or closed cavity (13), of a predetermined geometrical shape, arranged at a pre-set position on the post (1), defined in the same material from which the post is made and containing a substance (14) of a different density from that of the material from which the post (1) is made said substance (14) presenting suitable properties for the cavity (13) containing the same and/or the substance (14) itself in order to be visible through magnetic resonance, ionizing radiation of the CAT (computerized tomography) or CBCT (cone beam computerized tomography) type, or any other similar radiologic test.