| 摘要 |
The present invention relates to a nail and screw system (1) for improving t he fixation of proximal fractures of the humerus, including at least a Numeral nail (10) to be inserted in a Numeral shaft (9) and comprising at least a proximal transversal hole (5) for the passage of a corresponding locking scr ew (3), the screw (3) having a screw head (4) and a screw body (31). Advantageously, the nail is cannulated and the transversal hole (5) comprise s a couple of opposite holes (6', 6") on opposite wall of the cannulated nail (10); the hole (6) closer to the screw head (4) has an internal partially threaded portion (28) and the corresponding screw (3) has an outside thread diameter smaller than the diameter of said at least one transversal hole (27 ) that receives such a screw. Said nail is cannulated and said transversal hol e comprises a couple of opposite holes (6', 6") on opposite wall of the cannulated nail (10) and the hole (6') closer to the screw head (4) includes said partially threaded portion (28).
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