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US 8,075,598 B2Granted
Pedicle screw with a closure device
AssigneeSpinelab AG
InventorsThomas Zehnder, Reto Braunschweiler, Patrick White, Fabrice Chenaux
Life of this patent
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AssigneeSpinelab AG
InventorsThomas Zehnder, Reto Braunschweiler, Patrick White, Fabrice Chenaux
Estimating the term…
A pedicle screw with a closure device (16) for securing a rod (10) for stabilization of the vertebral column comprises a screw-in part (2), a head part (3) provided on the screw-in part (2), and a U-shaped recess (4) disposed in the head part (3), which recess is formed by the inner surfaces (5, 6) of two arms (7, 8) and a bottom surface (9) connecting the two inner surfaces. The rod (10) is insertable into this recess, and is held by the closure device (16). The rod (10) is provided with ridges (12) and grooves (13) running transversely with respect to the rod axis (11). Likewise provided with corresponding ridges (14) and grooves (15) is the bottom surface (9). The closure device (16) comprises a support element (17), which is insertable between the two arms (7, 8). Disposed in a displaceable way on the support element (17) are two sliding parts (20, 21), which, via a movement mechanism, are able to be brought from a position of being pushed against each other into a position of being pushed apart, in which pushed-apart position the two end regions (29), remote from one another, of the two sliding parts (20, 21) each project into a recess (23, 24) of the two arms (7, 8) in the state of the support element (17) being inserted in the screw. The closure device (16) is thereby locked with the pedicle screw; the rod (10) is firmly held in the pedicle screw.
A pedicle screw with a closure device for securing a rod for stabilization of the vertebral column, comprising a screw-in part, a head part provided on the screw-in part, a U-shaped recess disposed in the head part, which recess is formed by the inner surfaces of two arms and a bottom surface connecting the two inner surfaces, in which recess the rod is insertable and is held by the closure device, which rod is provided with ridges and grooves running substantially transversely with respect to the rod axis, and which bottom surface is provided with corresponding ridges and grooves, wherein the closure device comprises a support element, which is insertable between the two arms, in that two sliding parts are disposed in a displaceable way on the support element, which sliding parts are able to be brought, via a movement mechanism, from a position of being pushed against each other into a position of being pushed apart, in which pushed-apart position, two end regions, remote from each other, of the two sliding parts each project into a recess of the two arms in the state of the support element being inserted between the arms, and the closure device is locked with the pedicle screw.
Dependencies are inferred from the claim text.