Locking screw for an intramedullary nail

Details Locking screw for an intramedullary nail Locking screw for an intramedullary nail

A - Human Necessities

61

B

A61B 17/72 (2006.01)

Patent

CA 2518319

A locking screw for an intramedullary nail having at least one transverse hole. The locking screw has a central longitudinal axis and includes a screw shank, which is at least partially provided with an external thread, and a screw head. The diameter of the screw head is greater than the outer diameter of the external thread, and the screw head includes a passage extending generally parallel to the longitudinal axis of the screw and the external thread. The passage is configured to receive a longitudinal wedge element. As a result, any gap between the locking screw and the intramedullary nail is eliminated and the screw is wedged in position in the transverse hole of the intramedullary nail.

Vis de blocage (1) pour un clou intramédullaire (2) pourvu d'au moins un trou transversal (3), qui comporte un axe longitudinal central (7), une tige (4) de vis pourvue au moins sur certaines parties d'un filetage externe (5) et une tête (6) de vis. Le diamètre de la tête (6) de vis est plus grand que le diamètre externe du filetage externe (5) et la tête (6) de vis possède un passage (9) à extension essentiellement parallèle à l'axe longitudinal (7) et au filetage externe (5), destiné à recevoir un élément clavette (9) longitudinal. Cette configuration permet l'élimination du jeu présent entre la vis de blocage (1) et le clou intramédullaire (2) et le coinçage de la vis de blocage (1) dans le trou transversal (3) du clou intramédullaire (2).

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