A spinal implant comprising an elongate body insertable between adjacent vertebrae, the elongate body comprising first and second portions, the first and second portions each having an internal surface, the internal surface of the first portion facing the internal surface of the second portion in us
A spinal implant comprising an elongate body insertable between adjacent vertebrae, the elongate body comprising first and second portions, the first and second portions each having an internal surface, the internal surface of the first portion facing the internal surface of the second portion in use, at least part of each internal surface of the first and second portions being threaded, the spinal implant further comprising a bolt, at least part of the bolt being externally tapered and externally threaded, the external threads of the bolt corresponding with the threads of the internal surfaces of the first and second portions, wherein the bolt is insertable between the first and second portions of the elongate body such that the external threads of the bolt engage with the internal threads of the elongate body, whereby rotation of the bolt in the threaded internal surfaces of the first and second portions causes relative movement of first and second portions away from one another.
대표청구항▼
1. A spinal fixing comprising a fixing part for fixing to a part of a subject's spine, the fixing part having a first end, the first end having a head that is at least partially spherical;an elongate extension, the elongate extension having a first end, the first end having a head that is at least p
1. A spinal fixing comprising a fixing part for fixing to a part of a subject's spine, the fixing part having a first end, the first end having a head that is at least partially spherical;an elongate extension, the elongate extension having a first end, the first end having a head that is at least partially spherical;a coupling body for receiving the first end of the fixing part and the first end of the elongate extension therein; anda washer located between the first end of the fixing part and the first end of the elongate extension in use, the washer having first and second opposing surfaces being concavely curved, the first surface facing the first end of the elongate extension in use and the second surface facing the first end of the fixing part in use, the radius of curvature of the first surface being smaller than the radius of curvature of the at least partially spherical end of the elongate extension such that the washer makes a circular line of contact with the first end of the elongate extension when the spinal fixing is assembled and the radius of curvature of the second surface being smaller than the radius of curvature of the at least partially spherical end of the fixing part such that the washer makes a circular line of contact with the first end of the fixing part when the spinal fixing is assembled. 2. A spinal fixing according to claim 1, wherein the spinal fixing further comprises a compression member for compressing the first end of the fixing part and the first end of the elongate extension in locking engagement within the coupling body. 3. A spinal fixing according to claim 2, wherein the compression member is a locking screw. 4. A spinal fixing according to claim 3, wherein at least part of the locking screw is externally threaded, the coupling body having a bore with first and second open ends, at least part of the bore being internally threaded, the internal threads of the bore corresponding with the external threads of the locking screw. 5. A spinal fixing according to claim 1, wherein the coupling body comprises a hollow tubular body, the first end of the fixing part and the first end of the elongate extension being receivable in the hollow tubular body in use. 6. A spinal fixing according to claim 1, wherein the first end of the fixing part is pivotally coupled to the coupling body in use, such that the fixing part can pivot relative to the coupling body over a pre-determined range of motion. 7. A spinal fixing according to claim 1, wherein the coupling body has a slot, the elongate extension extending through the slot in use, such that the elongate extension can pivot relative to the coupling body over a pre-determined range of motion. 8. A spinal fixing according to claim 7, wherein the slot is elongate, having a longitudinal axis perpendicular with the longitudinal axis of a bore of the coupling body. 9. A spinal fixing according to claim 1, wherein the first end of the fixing part comprises a part-spherical head part and a removable rocker, the part-spherical head part being integral with or rigidly fixed to the fixing part, the rocker having first and second opposing surfaces, the first surface being part-spherical, the rocker having a male protrusion projecting from the second surface, the part-spherical head having a female recess for receiving the male protrusion.
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이 특허에 인용된 특허 (6)
Schultheiss, Markus; Claes, Lutz; Kinzl, Lothar, Bone screw.
Navas Fernand (Charbonnieres-les-Bains FRX), Extra-discal inter-vertebral prosthesis for controlling the variations of the inter-vertebral distance by means of a dou.
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