초록 ▼

The invention discloses a fastening system for pedicel screws anchorable in different vertebrae. The spherical screw heads lie in spherical shells of apertured counter-bodies. The counter-bodies have planar support surfaces which lie on a supporting link in the region of elongate holes. A screw elem

The invention discloses a fastening system for pedicel screws anchorable in different vertebrae. The spherical screw heads lie in spherical shells of apertured counter-bodies. The counter-bodies have planar support surfaces which lie on a supporting link in the region of elongate holes. A screw element is provided in the axial direction of each pedicel screw and is pivotably journalled at the supporting link with a spherical support surface arranged in the region of the elongate hole. The pedicel screws are generally skewed relative to one another and can, when account is taken of the nature of the bone, be rigidly connected to the supporting links via the screw elements due to the fact that the support surfaces can be clamped against one another in a self-locking manner on pedicel screws which are positioned inclined relative to the support surfaces.

대표청구항 ▼

[ We claim:] [1.] A fastening system for pedicel screws anchorable in different vertebrae of different orientations, said fastening system comprising:a supporting link including a plurality of apertures each having a receiving surface and a perpendicular and a planar supporting link surface which is

[ We claim:] [1.] A fastening system for pedicel screws anchorable in different vertebrae of different orientations, said fastening system comprising:a supporting link including a plurality of apertures each having a receiving surface and a perpendicular and a planar supporting link surface which is normal to the perpendicular;a plurality of counter-bodies each having a planar counter-body surface butting against one of the planar supporting link surfaces in a self-locking manner, a concave support surface, and a counter-body aperture extending between the planar counter-body surface and the concave support surface, the planar counter-body surface being adjustable relative to the planar supporting link surface to define a degree of inclination relative to the perpendicular;a plurality of pedicel screws each having a head with a spherically shaped pedicel support surface and defining a pedicel screw axis, the head including an internal threaded portion extending from the spherically shaped pedicel support surface along the pedicel screw axis, the spherically shaped pedicel support surface cooperating with the concave support surface of one of the counter-bodies; anda plurality of screw elements each having a spherical support surface and an external threaded portion extending along the pedicel screw axis of one of the plurality of pedicel screws, the external threaded portion extending through one of the plurality of apertures of the supporting link and the counter-body aperture of one of the plurality of counter-bodies, and engaging the internal threaded portion of the pedicel screw to secure the pedicel screw to the supporting link and the counter-body, the spherical support surface cooperating with the receiving surface at the aperture of the supporting link, the pedicel screw axis being oriented skewed relative to the perpendicular by a degree equal to the degree of inclination.