The invention relates to an abutment (100), in particular for dental interventions in assisted surgery, comprising: - a first element (1), comprising a lower cylindrical element (2) and a semi- spherical element (3) integral above with said cylindrical element (2), divided into a plurality of segments, held together by an outer element (4), in the transition zone between said lower cylindrical element (2) and said semi-spherical element (3) there being provided, internally, a shoulder (7), said semi-spherical element comprising a thread (5), ending at said shoulder (7), in which a centrally perforated screw (6) is coupled, a plurality of steps or protrusions (8) being provided on said lower cylindrical element (2)； - a second element (10), comprising a first upper cylindrical element (11), which inserts inside said cylindrical element (2) of said first element (1) and equipped externally with a plurality of steps or protrusions (12), which are able to move vertically with respect to staid plurality of steps or protrusions (8) provided on said cylindrical element (2), and a lower semi- spherical element (13)； and - a third semi-spherical element (16), divided into a plurality of segments, and ending with coupling means (14) with a dental implant (15).La présente invention concerne une butée (100), en particulier pour les interventions dentaires en chirurgie assistée, comprenant : - un premier élément (1), comprenant un élément cylindrique inférieur (2) et un élément semi-sphérique (3) intégré au-dessus avec ledit élément cylindrique (2), divisé en une pluralité de segments, maintenus ensemble par un élément externe (4), dans la zone de transition entre ledit élément cylindrique inférieur (2) et ledit élément semi-sphérique (3) qui est fourni au plan interne, un épaulement (7), ledit élément semi-sphérique comprenant un filetage (5), se terminant au niveau dudit épaulement (7), dans lequel une vis perforée centralement (6) est accouplée, une pluralité de pas ou de pro
