Posterior spinal internal fixation screw structure
A technology of fixing screws and posterior approach, applied in the field of medical clinical internal surgical instruments, can solve problems such as affecting the curvature and erection of the spine, and achieve the effect of ensuring the bending and erection, easy placement, and reducing the installation position.
Inactive Publication Date: 2016-06-01
无锡市闻泰百得医疗器械有限公司
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Problems solved by technology
[0002] The existing surgical treatment of spinal degenerative diseases, spinal tumors, trauma, and even spinal infection usually uses internal fixation technology. The posterior spinal internal fixation screw is connected with the reduction rod to realize the binding and reduction of the spine. In the middle, the spine will also produce normal bending and uprightness, which is usually achieved by a combination of bending rods. Due to the rigidity of the existing internal fixation screws in the posterior spine, in order to achieve normal bending and uprightness of the spine, the installation position of the combination of bending rods The requirements are relatively high. When the installation position of the internal fixation screw in the posterior spinal column deviates, it will affect the normal curvature and uprightness of the spine.
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[0008] See figure 1 , a kind of internal fixation screw structure of the spinal column, which includes a universal screw cover 1, a ball screw 2 is arranged in the universal screw cover 1, the ball screw 2 cooperates with the universal screw cover 1, and the universal screw cover 1 The upper end of the inner ball screw 2 is riveted with a locking bush 3, and the lower end of the locking bush 3 cooperates with the upper end of the ball screw 2. Since the ball screw rotates in the universal screw sleeve, the ball screw passes through the locking bush. The axial limit of set 3, the head-to-caudal angle can reach 110°, and the best screw placement point can be selected according to the characteristics of the anatomical structure of the spine to achieve the purpose of simplifying the operation. 、Effective rear support, increasing the screw swing angle, can effectively adjust the installation position of the combined bending rod, making it easier for the screw to be placed in place,...
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The invention provides a posterior spinal internal fixation screw structure. The requirement for the mounting position of a combined bent rod can be effectively reduced, powerful and effective posterior support is provided for the posterior spinal reconstructive surgery, a screw is put in place more easily, and normal bending and upright of the spinal are better guaranteed. The structure is characterized by comprising a universal screw sleeve, a ball screw is arranged in the universal screw sleeve and fit with the universal screw sleeve, a locking bushing is arranged at the upper end of the ball screw and in the universal screw sleeve, and the lower end of the locking bushing is fit with the upper end of the ball screw.
Description
technical field [0001] The invention relates to the technical field of medical clinical internally fixed surgical instruments, in particular to a posterior spinal internal fixation screw structure. Background technique [0002] The existing surgical treatment of spinal degenerative diseases, spinal tumors, trauma, and even spinal infection usually uses internal fixation technology. The posterior spinal internal fixation screw is connected with the reduction rod to realize the binding and reduction of the spine. In the middle, the spine will also produce normal bending and uprightness, which is usually achieved by using a combination of bending rods. Due to the rigidity of the existing posterior spinal fixation screws, in order to achieve normal bending and uprightness of the spine, the installation position of the combination of bending rods When the installation position of the internal fixation screw in the posterior spinal column deviates, it will affect the normal bendin...
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IPC IPC(8): A61B17/86
Inventor 宋普庆赵淮张忠祥邱文宾裴云霜
Owner 无锡市闻泰百得医疗器械有限公司