Pedicle screw

Abstract

The invention relates to a pedicle screw, which comprises a screw connecting part and a U-shaped connecting part, wherein the U-shaped connecting part is arranged on the top of the screw connecting part. The invention is characterized in that a transverse cutting track is arranged on the outer side of a groove wall of the U-shaped connecting part, and the transverse cutting track divides the U-shaped connecting part into a folding part and a locking part, wherein the folding part is positioned at the upper section and can be broken through being folded, the locking part is positioned at the lower section and is used for placing and locking a connecting rod, the groove depth of the locking part is greater than or equal to the sum of the diameter of the connecting rod and the thickness of the locking screw nut, and the inner side of the groove wall of the folding part and the inner side of the groove wall of the upper part of the locking part are provided with inner screw threads used for connecting a locking screw nut. The invention is favorable for the placement and the connection of the connecting rod.

Description

technical field [0001] The invention relates to a pedicle screw, which is mainly used to treat thoracolumbar fractures. bone fragments) thoracolumbar compression or burst fractures without nerve damage. Background technique [0002] At present, there are two kinds of pedicle screws that have been publicly used at home and abroad: one is the conventionally used pedicle screw, such as GSS thoracolumbar internal fixation, USS system, their pedicle screw part is solid, and the pedicle screw part is made of small incision and micro-screw. There are no guiding signs when placing pedicle screws in invasive surgery, and repeated fluoroscopy is required, otherwise it is easy to insert the wrong way, so the entire operation time is longer; there is also a percutaneous Sextant pedicle screw produced by a foreign company. In the internal fixation system, the pedicle screw part is hollow, but the U-shaped part at the top is relatively short, which is not conducive to the placement and c...

AI Technical Summary

Problems solved by technology

[0002] At present, there are two kinds of pedicle screws that have been publicly used at home and abroad: one is the conventionally used pedicle screw, such as GSS thoracolumbar internal fixation, USS system, their pedicle screw part is solid, and the pedicle screw part is made of small incision and micro-screw. There are no guiding signs when placing pedicle screws in invasive surgery, and repeated fluoroscopy is required, otherwise it is easy to insert the wrong way, so the entire operation time is longer; there is also a percutaneous Sextant pedicle screw produced by a foreign company. Internal fixation system, its pedicle screw part is hollow design, but the U-shaped part at the top is short, which is not conducive to the placement and connection of connecting rods

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