Method of performing a coupling device specific dental attachment to a patient, the method comprising: - determining, for an implantation site in the maxilla or mandible in which a dental post (2, 122, 200, 300, 400, 500) having a first indexing means (6, 126, 214, 302, 402a, 402b, 402c, 502) has been or is to be inserted, an inclination of the attachment relative to the jawbone and rotational orientation of said first indexing means relative to the jawbone, - determine, based on the determined inclination of fixing and rotational orientation of said first indexing means, a shape of a first part (16 " , 258) of a coupling device dental attachment (8 ", 118, 250, 350, 450, 550, 570) and direction of rotation of said first part relative to the fixation, - provide a coupling device fixing dental purchasing It gives a second coupling part attachment (14, 256, 352) having a second means of indexing (20 ", 124, 260, 358, 360, 452a, 452b, 452c, 552, 572) that can only be coupled to said first indexing means in a rotational position of the second part with respect to the fitting, and a first portion having said predetermined shape and is in such position of rotation relative to said second indexing means as to obtain said orientation given rotation of the first part when fixing which engages the second part of the coupling device dental attachment is connected to the dental fixture.Método de realización de un dispositivo de acoplamiento de fijación dental específico para un paciente, comprendiendo el método: - determinar, para un sitio de implantación en el maxilar superior o la mandíbula en el que una fijación dental (2, 122, 200, 300, 400, 500) que tiene un primer medio de indexación (6, 126, 214, 302, 402a, 402b, 402c, 502) ha sido o va a ser insertada, una inclinación de la fijación con respecto al hueso de la mandíbula y la orientación de rotación de dicho primer medio de indexación con respecto al hueso de la mandíbula, - determinar, en base a la inclinación determina
