A dental implant (1) that has a pole piece (2) provided to be inserted into a jaw and that has a mounting piece (4) associated therewith, where the mounting piece (4) includes a pin molded contact on top (8) that can be inserted in a form-locked way, in an associated shaped recess (10) formed in the pole piece (2), both the contact pin (8) of the mounting piece (4) and the shaped recess (10) in the pole piece (2) have a decreasing design, characterized in that the cross section of the contact pin (8) and the associated recess cross section (10) with it each include three main directions, in each of which the radius takes a relative maximum value, and three secondary directions, in each of which the radius takes a relative minimum value, the outer contour of the cross section is selected so that at each point, it has exactly one tangent, it is intersected by any straight line at most two points, and corresponds to an oval segment in the regions between two main directions in each case, and the contours of the cross sections are selected in each case so that the ratio of radius minimum to maximum radius is at least 0.7 and at most 0.95 and the angle of decrease of the contact pin (8) and / or of the shaped recess (10) is in the range between 1 ° and 15 °.Un implante dental (1) que tiene una pieza de poste (2) proporcionada para ser insertada en una mandíbula y que tiene una pieza de montaje (4) asociada con la misma, en donde la pieza de montaje (4) incluye un pasador de contacto moldeado encima (8) que se puede insertar de una manera de trabado de forma, en un rebaje con forma asociado (10) formado en la pieza de poste (2), tanto el pasador de contacto (8) de la pieza de montaje (4) y el rebaje con forma (10) en la pieza de poste (2) tienen un diseño en disminución, caracterizado por que la sección transversal del pasador de contacto (8) y la sección transversal del rebaje con forma (10) asociado con el mismo incluyen cada una tres direcciones principales, en cada un
