摘要:
The invention relates to a device for implanting in a human or animal vertebral column, said device comprising a base carrier (10) that can be fixed to a first vertebral body, an upper carrier (14) that can be fixed to a second vertebral body, and a spacer element fixed between the base carrier and the upper carrier. The base carrier (10) and/or the upper carrier (14) are provided with a cavity (18, 24) comprising undercuts, for receiving the spacer element in a positively locked manner. The aim of the invention is to economically create one such device that ensures complete freedom of movement of the vertebral column. To this end, the spacer element is embodied as metallic bellows (12).
摘要:
An anchoring element for fastening a rod of a device for adjusting a human vertebral column on a vertebra and having a retainer for receiving the rod, a securing element attachable on the retainer and acting against the rod, a fastening element for attachment to the vertebral body and a clamping device between the retainer and the fastening element including a ring-shaped mount, a partially spherical bearing and an intermediate element embedded in the mount and surrounding the bearing. The bearing comprises level guiding surfaces on opposite sides. The intermediate element has mating counter surfaces which enable the retainer to move in one axial direction only relative to the fastening element and the level counter surfaces are formed on an inner side of one of two generally circumferentially extending elongate segments of the intermediate element.
摘要:
The invention relates to an anchoring element for fixing a rod of a device for setting a human or animal spinal column to a vertebra, comprising a screwed element (16) and a retaining element, whereby the screwed element (16) has a bearing element in the form of a spherical segment and a conically-tapering threaded shaft (18) and the retaining element has a mounting (12), for housing the rod and a bearing shell (14), for housing the bearing element of the screwed element (16). According to the invention, an anchoring element with low material requirements and simple to produce can be achieved, whereby the bearing shell (14) is embodied to correspond to the bearing element such that the bearing element may be directly mounted in the bearing shell (14).
摘要:
An apparatus for bracing a plurality of vertebrae of the human spine has at least two pedicle screws, each having an annular head with an opening therewithin and including a slot therewithin. Each slot extends into the corresponding opening and includes internal threaded portions. A securing screw to be screwed in each slot is provided. A relatively stiff threaded rod is also provided and is to be inserted into the opening in the head of each of the pedicle screws and to be secured by the securing screws. Adjusting nuts are screwed on the rod and at least one cooperates with each head.
摘要:
The invention relates to a vertebral body placeholder comprising a cylindrical inner body (14), which can be inserted in a telescopic manner into a coaxially arranged, sleeve-shaped outer body (16). The aim of the invention is to create a vertebral body placeholder that does not unwantedly penetrate spongy vertebrae. To this end, a cap (20, 22) is placed on a face of the inner body (14) and/or on a face of the outer body (16).
摘要:
The invention relates to a vertebral body placeholder having a cylindrical inner body (14), which can be telescopically inserted into a coaxially arranged sleeve-shaped outer body (16). A detent device that works in one direction is arranged between the inner body (14) and the outer body (16). A number of detent projections (22) are arranged in succession in an axial direction and form a row (20) of detent projections. A number of detent notches (26) are arranged in succession in an axial direction while corresponding to the row (20) of detent projections. Said detent notches form a row (24) of detent notches that completely or partially accommodate the row (20) of detent projections. The invention also relates to a method for assembling said vertebral body placeholder. The aim of the invention is to create a vertebral body placeholder whose overall height can be easily and reliably adjusted, particularly, during implantation. To this end, a groove (28) for accommodating the row (20) of detent projections without obstructing it is provided next to the row (24) of detent notches.
摘要:
An apparatus for bracing a plurality of vertebrae of the human spine has at least two pedicle screws, each having an annular head with an opening therewithin and including a slot therewithin. Each slot extends into the corresponding opening and includes internal threaded portions. A securing screw to be screwed in each slot is provided. A relatively stiff threaded rod is also provided and is to be inserted into the opening in the head of each of the pedicle screws and to be secured by the securing screws. Adjusting nuts are screwed on the rod and at least one cooperates with each head.
摘要:
A repositioning tool for handling pedicle screws which have annular heads with parallel clamping faces is provided. The tool has a tongue-shaped portion connected to a handle, which tongue-shaped portion is brought into engagement with the head of a pedicle screw in the axial direction thereof. The tool can apply a tilting moment perpendicular to the length axis of the pedicle screw and can apply a torque. The tool comprises pliers with jaws (22, 24) including inwardly extending projections (28, 30) to engage opposite indentations (70, 72) provided along the periphery of the annular head (64) of the pedicle screw (60).
摘要:
A spacer device for supporting vertebral bodies, comprising a first supporting member to engage a first vertebral body, a second supporting member to engage a second vertebral body and an adjustment means including a sleeve having an internal thread and a pair of bolts each having an outer thread cooperating with said sleeve to adjust the supporting members in a predetermined distance with respect to each other, whereby the adjustment means is provided with clamping faces at either end, which adjustment faces are aligned with the axis of the sleeve and the bolts or alternatively are disposed parallel to said axis, the supporting members are provided with clamping faces extending substantially normally with respect to the supporting faces and a screw connection is provided for each supporting member to press the clamping faces of the adjustment means and the supporting member together in a predetermined position with respect to each other. The first and second supporting members are preferably plate shaped and in the shape of vertebral discs and have prongs which engage natural vertebral discs.