Vertebral arch pedicle screw system capable of being embedded with minimal invasion

Abstract

The invention discloses a vertebral arch pedicle screw system capable of being embedded with minimal invasion, which comprises at least two screw seats (5) with round section. Each screw seat (5) is provided with a guider composed of two half guiders (1) which are symmetrically arranged on the outer walls of two sides of a U-shaped groove (5-2) on the screw seat (5), the middle of each half guider (1) is an arc plate (2) identical with the outer wall of the screw seat (5), the arc length of the arc plate is equal to the arc length on lateral outer wall of the U-shaped groove (5-2). Guide wings (3) are positioned at two ends of the arc plate (3), the end of the arc plate (2) in the middle of each half guider extends towards the outer side of the arc plate (2) to form the guide wing (3), two protrusions (4) parallel to the generatrix of the arc plate (2) are arranged on the inner wall of the arc plate (2) of each half guider (1), and location grooves (5-1) for the protrusions (4) to be inserted into are respectively and correspondingly positioned on the outer walls of two sides of the U-shaped groove (5-2) of each screw seat (5).

Description

technical field [0001] The invention relates to a medical surgical instrument, in particular to a spinal internal fixer, which is suitable for minimally invasive surgery of spinal internal fixation. Background technique [0002] Segmental instability of the spine, fracture fragments, or displacement of intervertebral disc tissue caused by lumbar fractures can compress the dural sac or nerve roots, causing neurological symptoms. Patients with neurological symptoms or severe fracture compression often require surgical treatment. The purpose of surgical treatment is to stabilize the spine, restore the height of the vertebral body, decompress the spinal canal, and reduce the compression on the nerves. The current classic operation method is to use the rod-rod pedicle screw system for strong internal fixation through the posterior pedicle. , a fixing rod and a screw plug, wherein the pedicle screw is set at one end of the screw seat, and the screw rod is set in the U-shaped gro...

AI Technical Summary

Problems solved by technology

The traditional nail implantation process adopts open surgery, during which the fixation rod is inserted into the U-shaped groove from the end of the nail seat; in addition, the minimally invasive (percutaneous) method is also used under the X-ray perspective of the C-arm For implanting nails, the fixing rod of this surgical method needs to pass through the subcutaneous tunnel first, and then penetrate into the U-shaped groove from the side of the nail seat. However, since the width of the U-shaped groove is equivalent to the diameter of the fixing rod, it must be Only when the fixation rod is accurately aligned with the U-shaped groove can it be inserted smoothly from the side. The installation of the fixation rod is very difficult, especially when multiple segments of the spine are fixed.

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