Bone fixation System comprises a cannulated Screw Component (2) and (4) a Seat Component and a Clamping Component (6).The component (2) screw comprises a Screw Head (8) arranged in the region of in extremo next Component (10) of the screw (2), and a lengthened Screw Shaft (12) extending from the screw Head (8) along a longitudinal AXIS (a) in the direction a distal end (14) the component screw (2).The screw Head (8) comprises a surface (20) on a Next Previous Face oriented towards the end next (10) and a distal Surface (22) on a rear Face oriented towards the distal End (14), at least a portion of the distal Surface (22), form a Surface CIE contact (24).The seat Component (4) comprises a Central Hole (26) which has an Orifice diameter (D1) greater than the maximum diameter (DS) screw Shaft (12) and less than the maximum diameter (DH) of the screw Head Seat (8) This component also comprises a surface (4) support (30) or ready to contact on the contact surface and a base Surface (24) (32)Ready to get in contact with the bone when the bone fixation system is fully armed.The system for fixing Bones also comprises a Fastening Component (6),You can connect and form an integral part of the seat Component (4) and defines a portion of accommodation (40) for the screw Head (8) so that the screw Component (2) and (4) the seat Component Connect permanently while allowing the axial rotation of the SEAT Component (4) with regard to Component screw (2).Sistema de fijación de huesos que comprende un componente tornillo canulado (2) y un componente asiento (4) y un componente de sujeción (6). El componente tornillo (2) comprende una cabeza de tornillo (8) dispuesta en la región de in extremo próximo (10) del componente tornillo (2), y un eje de tornillo alargado (12) que se extiende desde la cabeza de tornillo (8) a lo largo de un eje longitudinal (A) en dirección a un extremo distal (14) del componente tornillo (2). La cabeza de tornillo (8) comprende una superficie próxima (20) so
