The surgical assembly for bone repair comprises a metal guide pin (8) and a cylindrical screw (1) having two threaded ends (2,4), a smooth intermediate portion (6) and a longitudinal central hole (7) opening for the passage of the guide pin (8) .The threading (5) of the second end has a given pitch (P2) and diameter (D2), different from the pitch (P1) and the diameter (D1) of the thread. the first end (2) .De addition it comprises a filling element (9) able to close over at least part of its length the longitudinal central hole (7) after insertion of the screw (1) in the bone and withdrawal the metal guide pin (8), which element may be a cylindrical rod (9), having a diameter slightly smaller than the diameter of the central hole (7), preferably in a breakable material, the screw (1) and the filling element may be in a biodegradable and / or resorbable material.
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