Dynamic repairing device for lumbar vertebra isthmus
A technology of dynamic repair and isthmus, applied in the direction of internal bone synthesis, internal fixator, fixer, etc., can solve the problems of low incidence of complications and impact, achieve the maintenance of the original structure of the spine, fast operation, and avoid degeneration The effect of the risk
Inactive Publication Date: 2012-10-10
KANGHUI MEDICAL INNOVATION
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Problems solved by technology
[0003] In recent years, canyon screws, steel wire binding or hook screw fixation are mainly used to treat such diseases clinically. Although these treatment methods can achieve good therapeutic effects, the incidence of complications is still not low, especially for young patients. Patients with fusion failure or degenerative diseases after fusion have a serious impact on future life
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[0019] Refer to attached figure 1 , 2 , The dynamic repair device for the lumbar isthmus includes a threaded rod 1 , a fixing hook 2 , a spring 3 and a nut 4 . The fixed hook 2 is sleeved on the threaded rod 1, the nut 4 is housed on the threaded rod 1, and the spring 3 is sleeved on the threaded rod 1 between the nut 4 and the fixed hook 2.
[0020] The threaded rod 1 is set in the shape of a round rod, the front end of the threaded rod 1 is provided with a section of zigzag thread 11, the zigzag threaded head 12 is set in a conical shape, and the rear end of the threaded rod 1 includes a section of triangular thread 13 and a section of outer hexagonal rod 14 or Inner hexagonal hole; fixed hook 2 is set to cylinder or square, and fixed hook 2 one end is set to hook shape 21, and hook shape width can be set to different sizes, and fixed hook 2 other end is provided with a through hole 22, and through hole axial direction and fixing The hook-shaped axis directions are perpend...
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The invention relates to a dynamic repairing device for lumbar vertebra isthmus and belongs to the technical field of an internal fixing instrument of an implantation material of spine surgery. The dynamic repairing device is especially used for treating the diseases, such as lumbar vertebra isthmus disconnection and spondylosis. The dynamic repairing device comprises a threaded rod, a fixing hook, a spring and a nut, wherein the fixing hook is sleeved on the threaded rod; the nut is arranged on the threaded rod; the spring is sleeved on the threaded rod between the nut and the fixing hook; the threaded rod is arranged in a circular rod shape; a section of saw-tooth thread is arranged at the front end of the threaded rod; a cone is arranged on a head part of the saw-tooth thread; and the rear end of the threaded rod comprises a section of triangular thread and a section of outer hexagonal rod or inner hexagonal hole. The fixing hook is arranged in a cylindrical or square shape; a hook part is arranged at one end of the fixing hook; a through hole is formed at the other end of the fixing hook; and an axial direction of the through hole is vertical to an axis direction of the hook part of the fixing hook.
Description
technical field [0001] The invention relates to a dynamic repair device for the lumbar isthmus, and belongs to the technical field of internal fixation instruments for implants in spinal surgery. It is especially used to treat diseases such as lumbar isthmus nonunion and spondylolysis. Background technique [0002] Lumbar isthmus nonunion is also called lumbar spondylolysis clinically. It is a disease caused by the discontinuity of the bone defect in the isthmus between the upper and lower articular processes of one or both sides of the lumbar spine. Normal human vertebrae have three primary osteogenic centers, one in the vertebral body and one in each of the vertebral arches on both sides. The occurrence of nonunion of the lumbar isthmus is mostly considered to be due to dysplasia, which leads to the weakness of the lumbar isthmus. When the waist is stimulated by trauma, strain, etc., it will lead to non-connection of the lumbar isthmus in the dysplastic lumbar spine. T...
Claims
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Inventor 杨利波山卫东王志敏王彤余强蒋庆幸丁伟王爱平蒋凯彭豪鲍益富孙协
Owner KANGHUI MEDICAL INNOVATION