Extension sheets of pedicle screw tail, expander, and tamper reset rod

Abstract

The invention discloses extension sheets of a pedicle screw tail, wherein two extension sheets are arranged oppositely on the tail part of a pedicle screw; the extensions sheets are flexible extension sheets; because the extension sheets are designed in a flexible manner, namely the extension sheets has elastic and bendable characteristics; the extension sheets on subcutaneous part can be elastically bent under the effect of external force; expansion tendency cannot be extended to an epithelial part; muscle on the subcutaneous part is only extruded so as to keep a small notch; when threading bar operation is processed by a reset bar, an enough threading bar space can be provided because two extension sheets on the subcutaneous part are bent so as to be expanded and separated; thus, the threading bar operation is processed easily so as to reduce risk of minimally invasive surgeries. An expanded and a tamper reset rod which are matched with the extension sheets are also disclosed by the invention.

Description

technical field [0001] The invention relates to the technical field of medical instruments, in particular to an extension piece of a pedicle screw tail, and a dilator and a compression rod reset rod used in conjunction with the extension piece. Background technique [0002] Spinal fixation technology can be simply summarized as two steps: first the whole, then the local. That is, the reset rod is pre-bent into the curved shape of the human spine and connected to the spine through pedicle screws, etc.; then stretched / compressed, and then the reset rod is finally locked on the pedicle screws. [0003] The steps of the surgical operation of spinal internal fixation technique are as follows: [0004] 1. Preoperative preparation: selection of pedicle screw (length and diameter); [0005] 2. Pedicle screw positioning and screw path preparation; [0006] 3. Implantation of pedicle screws into the human body; [0007] 4. Set the stick. Generally, the tail end of the pedicle scr...

AI Technical Summary

Problems solved by technology

[0013] However, there are difficulties in the operation of wearing rods in the above-mentioned minimally invasive therapy

Because the extension piece cannot be bent and deformed during the operation, and the space between the two extension pieces for the reset rod to pass through cannot be changed, resulting in high difficulty and high risk for the insertion operation of the reset rod

[0014] In addition, when pressing rods, the configured rod pressing device needs to be equipped with two guide rods. The guide rods are rigidly connected with the extension piece. , the structure of the rod presser with this structure is complex, not easy to operate, and the operation risk is relatively high

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