Closure plug for open-headed medical implant

Details Closure plug for open-headed medical implant Closure plug for open-headed medical implant

A - Human Necessities

61

B

A61B 17/68 (2006.01) A61B 17/70 (2006.01) A61B 17/88 (2006.01)

Patent

CA 2466417

A closure (6) for an open headed medical implant, such as a bone screw (5). The closure (6) having a cylindrical body (35) having an axis of rotation and also has a threaded, radial outer surface (40). The body (35) has a plurality of bores (44, 45, 46) that open onto a top surface of the body and that are parallel to but spaced from the axis of rotation. In one embodiment the closure (106) also has a break-off head (36) centrally attached by a neck (54) to the top surface of the body (135). Preferably, the body (135) also includes an axial, threaded bore (161) that extends from a bottom to the top of the surface body, but that is only exposed when the break-off head (36) breaks away. In another embodiment, a tool (180) is used to insert the closure (106) in the implant without a break-off head (36) and a central, threaded bore (161) of the closure (106) receives a set screw (108).

Obturateur (6) pour implant médical à tête ouverte, tel que vis pour os (5). L'obturateur présente un corps cylindrique (35) ayant un axe de rotation, ainsi qu'une surface extérieure radiale filetée (40). Le corps (35) présente une pluralité de trous (44, 45, 46) débouchant à la surface du corps, parallèles entre eux, mais tout en étant à distance de l'axe de rotation. Selon une forme d'exécution, l'obturateur (106) présente également une tête autocassante (36) reliée en son centre par une collerette (54) à la surface supérieure du corps (135). De préférence, le corps (135) présente également un trou taraudé axial (161) s'étendant de la base jusqu'à la surface supérieure du corps (135), mais qui n'est exposé que lorsque la tête autocassante (36) se détache. Selon une variante d'exécution, un outil (180) est utilisé pour insérer l'obturateur (106) dans l'implant, sans tête autocassante (36), et un trou taraudé central (161) de l'obturateur (106) reçoit une vis de réglage (108).

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