Orthopedic plate system and method for using the same

Details Orthopedic plate system and method for using the same Orthopedic plate system and method for using the same

A - Human Necessities

61

B

A61B 17/58 (2006.01)

Patent

CA 2598444

An orthopedic bone fixation device (100) for stabilizing a plurality of bone segments includes a bone plate (110) and a screw assembly (120). The bone plate (110) includes a body defining at least one thru-bore (230), wherein the thru-bore (230) is defined to include a central cavity, the central cavity having a middle diameter (350), an entry diameter (330), and an exit diameter (340), the middle diameter (350) being larger than both the entry diameter (330) and the exit diameter (340). Further, the screw assembly (120) is configured to be coupled to the bone plate (110), wherein the screw assembly (120) includes a bone screw (220) having a head section (410), a thread section (400), and a central bore (440), an expandable ring (210) coupled to the head section (410), and a pin (200) at least partially disposed in the central bore (440), wherein the pin (200) includes a varying outer profile that engages the expandable ring (210) to vary an outer diameter (540) of the expandable ring (210) to lock the screw assembly (120) in the thru-bore (230).

La présente invention a trait à un dispositif de fixation osseuse orthopédique (100) permettant la stabilisation de segments osseux comportant une plaque vissée (110) et un ensemble de vis (120). La plaque vissée (110) comporte un corps définissant au moins un alésage traversant (230), l'alésage traversant (230) étant défini pour inclure une cavité centrale, la cavité centrale ayant un diamètre médian (350), un diamètre d'entrée (330), et un diamètre de sortie (340), le diamètre médian (350) étant supérieur au diamètre d'entrée (330) et au diamètre de sortie (340). En outre, l'ensemble de vis (120) est agencé pour être couplé à la plaque vissée (110), l'ensemble de vis (120) comprenant une vis à os (220) ayant une section de tête (410), une section filetée (400), et un alésage central (440), un anneau expansible (210) couplé à la section de tête (410), la tige (200) comportant un profil extérieur variable qui engage l'anneau expansible (210) pour faire varier un diamètre extérieur (540) de l'anneau expansible (210) pour le verrouillage de l'ensemble de vis (120) dans l'alésage traversant (230).

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