胸腰椎椎弓根内固定器 Thoracolumbar pedicle fixation device
本实用新型涉及一种医疗器械，特别是脊柱固定器。 The present invention relates to a medical instrument, in particular spinal fixation device.
现有技术中，在胸腰椎骨折、脊柱滑脱手术中常用的固定器为DICK内固定器，该固定器需要旋紧的螺母较多，共达六个，操作繁琐，手术费时，又不适宜使用于胸椎。 Art, commonly used in thoracolumbar fractures, spondylolisthesis surgery holder within DICK holder, the holder needs more tightening of the nut, a total of six, complicated operation, time-consuming operation, and should not be used in the thoracic spine. 而另一种STEEFFE固定器则无轴向撑开力，不适宜于压缩性腰椎骨折的内固定，而RF固定器则是螺钉成角区剪力很大，易发生螺钉断裂。 While another fixture STEEFFE no axial force distraction, not suitable for the lumbar fixed compression fracture, while RF is a screw fixture to a large shear angle region, screw breakage prone.
本实用新型的目的在于提供一种结构简单、轴向撑开角度可调的胸腰椎椎弓根内固定器。 The present invention aims at providing a simple structure, axially adjustable angle distraction thoracic pedicle fixation device.
本实用新型的技术方案是：一种胸腰椎椎弓根内固定器，螺棒连接套的中央部设有外六角帽，所述的螺棒连接套的上端部与上螺棒的下端部螺纹连接，所述的螺棒连接套的下端部与下螺棒的上端部螺纹连接；所述的上螺棒的上端部的端面齿与所述的上螺钉端部的端面齿相啮合，所述的上螺棒的上端部与上螺钉的端部由上螺栓相紧固；所述的下螺棒的下端部的端面齿与所述的下螺钉端部的端面齿相啮合，所述的下螺棒的下端部与下螺钉的端部由下螺栓相紧固。 The technical solution of the present invention is: A thoracic lumbar pedicle screw, screw rod is provided with a central portion connected to an outer sleeve hex cap screw rod upper end of the sleeve is connected to the lower end portion of the rod screw thread connected to a screw rod connected with the upper portion of lower sleeve portion lower screw threaded rod; said end faces of the teeth on the screw rod upper face gear portion on the end of the screw is engaged, the the screw rod and the upper end portion of the screw is fastened by the bolt phase; said lower face gear screw rod lower end portion of the face gear portion of the lower end of the screw engages the lower spiro lower rod portion and the lower end portion of the screw is fastened by the bolt phase.
本实新型与现有技术相比具下列优点：由于上螺棒与上螺钉通过端面齿相啮合，因此其相对的角度可调节，下螺棒与下螺钉也同样角度可调，在调节好角度后可分别用上螺栓及下螺栓旋紧，再调节外六角帽，可同时拉紧两侧的螺钉使得它有轴向撑开力，撑起被压缩的骨折部。 This new solid having the following advantages over the prior art: Since the screw rod and the upper face gear is engaged by the screw, so the relative angle can be adjusted, the screw rod and the screw is also adjustable angle, the angle at regulate can spend the lower bolt and bolt are tightened, and then adjusting the hex cap screw can be tightened at the same time on both sides so that it has an axial distraction force, prop the fracture is compressed. 整个装置上只有三个螺母，操作方便，节省手术时间。 The entire apparatus easily only three nuts, operation, saving operation time.
下面结合附图及实施例对本实用新型作进一步的描述：附图1为本实用新型的结构示意图；附图2为附图1的仰视图； Connection with the following Examples and accompanying drawings further embodiment of the present invention is described as: Figure 1 is a schematic structural diagram novel utility; Figure 2 is a bottom view of Figure 1;
附图3为去掉下螺棒时的下螺钉的结构图；附图4为本实用新型去掉下螺钉及上螺钉时的后视图；其中：.上螺钉；.上螺栓；.刻度；.上螺棒；.螺棒连接套；.外六角帽；.下螺棒；.下螺钉；.下螺栓；.端面齿；.端面齿。 Figure 3 is a block diagram of the screw when the screw rod removed; Fig. 4 of the present invention to remove the screws and the rear view of the screw; wherein:  on the screw;  on the bolt;.  the scale;  the screw rod;..  spiro rod connector sleeve;  hex cap;  the screw rod;.  the screw;. . . Hirth ;; lower bolt  face gear.
实施例：参见附图，一种胸腰椎椎弓根内固定器，螺棒连接套的中央部设有外六角帽，所述的螺棒连接套的上端部与上螺棒的下端部螺纹连接，所述的螺棒连接套的下端部与下螺棒的上端部螺纹连接；所述的上螺棒和下螺棒上的螺纹方向相反，以便于转动外六角帽时可缩短或加长上下螺钉之间的距离，调节其轴向撑开角度。 Example: Referring to the drawings A thoracic lumbar pedicle screw, screw rod connecting sleeve  of the center portion is provided with an outer hexagon cap , the screw rod connecting sleeve  of the upper portion and the rod-spiro  connected to a lower end portion of the screw, the screw rod connecting sleeve  the lower portion of the lower bar-spiro  of the upper portion of a threaded connection; the upper rod spiro  and the a threaded rod opposite directions spiro  to facilitate rotation hex cap may shorten or lengthen the distance between the upper and lower screws, adjusting the angle of its axial distraction. 所述的上螺棒的上端部的端面齿与所述的上螺钉端部的端面齿相啮合，所述的上螺棒的上端部与上螺钉的端部由上螺栓相紧固；所述的下螺棒的下端部的端面齿与所述的下螺钉端部的端面齿相啮合，所述的下螺棒的下端部与下螺钉的端部由下螺栓相紧固。 Hirth  of the upper end portion of the rod-spiro  and the screw  an end face gear portion  is engaged,  the upper end of the upper screw bar and screw  of the end portion  with a fastening bolt; spiro rod end face gear  of the lower end portion of the lower  and the lower end portion of the screw according to  tooth  is engaged, the rod-spiro  and the lower end portion of the screw portion  in the fastened by screws  phase. 所述的螺棒连接套的上部套在上螺棒上，所述的螺棒连接套的内壁螺纹与所述的上螺棒的外螺纹相连接。 The screw rod of the screw rod connecting sleeve  set in the upper portion of the rod-spiro , the screw rod connecting sleeve  with said threaded inner wall  is connected to the external thread . 所述的螺棒连接套的下部套在下螺棒上，所述的螺棒连接套的内壁螺纹与所述的下螺棒的外螺纹相连接。 A lower portion of said screw rod connecting sleeve  sets the lower rod spiro , the screw rod connecting sleeve  the inner wall of the outer screw thread of the lower rod spiro  is connected. 所述的上螺栓穿过所述的上螺棒的上端部，所述的上螺栓与上螺钉相螺纹连接。  through said upper rod spiro  the upper end portion of said bolt   is connected with the screw thread of the bolt. 所述的下螺栓穿过所述的下螺棒的下端部，所述的下螺栓与下螺钉相螺纹连接。 Said screws  through the screwed rod according to  of the lower portion, said lower screw   with a threaded connection with the screw. 所述的上螺钉及下螺钉的端部分别刻有刻度，可通过所述的刻度了解螺钉与螺棒的偏离角度，以便按手术方案正确操作。 Said screw  and the screw  The end portions engraved a scale , the deviation angle can be appreciated screw screwed through said rod scale to operate properly according to the surgical plan.