An abutment arrangement (1; 10) for connecting a dental restoration (4; 40) to a dental implant (5; 50), comprising a post body (2; 20) and a screw element (3; 30), wherein the post body (2; 20) has an axial passage (21; 210) extending between an apical aperture (212; 2120) and an occlusal aperture (211; 2110); the passage (21; 210) of the post body (2; 20) has a head socket (213; 2130) and a press section (214; 2140) at an apical end side of the head socket (213; 2130); the screw element (3; 30) comprises a head section (31; 310) and a fastening thread section (32; 320) axially distant from the head section (31; 310); the screw element (3; 30) is designed to be arranged in the passage (21; 210) of the post body (2; 20) so that the head section (31; 310) is positioned in the head socket (213; 2130) abutting the press section (214; 2140), and so that the screw element (3; 30) extends through the apical aperture (212; 2120) whereby the fastening thread section (32; 320) of the screw element (3; 30) at least partially is positioned out of the post body (2; 20); and the post body (2; 20) has a mounting portion (231, 232; 2320, 2330) which is flexible between an expanded position and a constricted position, and which has an inner face radially limiting the passage (21; 210), characterized in that the screw element (3; 30) has a first locking section (33; 330) and the inner face of the mounting portion (231; 232; 2320; 2330) has a second locking section, wherein, when the screw element (3; 30) is arranged in the passage (21; 210) of the post body (2; 20), the first locking section (33; 330) of the screw element (3; 30) is positioned adjacent to the second locking section of the mounting portion (231, 232; 2320, 2330) of the post body (2; 20), and the first locking section (33; 330) of the screw element (3; 30) and the second locking section of the inner face of the mounting portion (231, 232; 2320, 2330) are configured to plastically deform the screw element (3; 30), the post body (2; 20) or the screw element (3; 30) and the post body (2; 20) such that the mounting portion (231, 232; 2320, 2330) of the post body is locked in the expanded position. the post body (2; 20) has an axial passage (21; 210) extending between an apical aperture (212; 2120) and an occlusal aperture (211; 2110); the passage (21; 210) of the post body (2; 20) has a head socket (213; 2130) and a press section (214; 2140) at an apical end side of the head socket (213; 2130); the screw element (3; 30) comprises a head section (31; 310) and a fastening thread section (32; 320) axially distant from the head section (31; 310); the screw element (3; 30) is designed to be arranged in the passage (21; 210) of the post body (2; 20) so that the head section (31; 310) is positioned in the head socket (213; 2130) abutting the press section (214; 2140), and so that the screw element (3; 30) extends through the apical aperture (212; 2120) whereby the fastening thread section (32; 320) of the screw element (3; 30) at least partially is positioned out of the post body (2; 20); and the post body (2; 20) has a mounting portion (231, 232; 2320, 2330) which is flexible between an expanded position and a constricted position, and which has an inner face radially limiting the passage (21; 210), characterized in that the screw element (3; 30) has a first locking section (33; 330) and the inner face of the mounting portion (231; 232; 2320; 2330) has a second locking section, wherein, when the screw element (3; 30) is arranged in the passage (21; 210) of the post body (2; 20), the first locking section (33; 330) of the screw element (3; 30) is positioned adjacent to the second locking section of the mounting portion (231, 232; 2320, 2330) of the post body (2; 20), and the first locking section (33; 330) of the screw element (3; 30) and the second locking section of the inner face of the mounting portion (231, 232; 2320, 2330) are configured to plastically deform the screw element (3; 30), the post body (2; 20) or the screw element (3; 30) and the post body (2; 20) such that the mounting portion (231, 232; 2320, 2330) of the post body is locked in the expanded position.