CN105287058B - Adapted transpedicular intervertebral disc oblique screw interbody fusion cage - Google Patents

Abstract

The invention relates to an intervertebral fusion device used for spinal surgery and adapted to be used for transpedicular and intervertebral disc oblique screws. The improved interbody cage is composed of upper surface, lower surface, left side, right side, rear surface, anterior surface and angle bevel. The angular bevel may be located between the left side and the front surface or between the front and right side, and the angle of the bevel is between about 15 degrees and 75 degrees. The upper surface and the lower surface are provided with large holes, which pass through each other, so that the body is in a hollow structure, which is used for inserting artificial bone or autologous bone. A number of X-ray opaque marking needles are arranged on the right side or the left side or the front surface. There is a holding hole on the front surface. The present invention can be directly inserted into the intervertebral space through the posterior operation, avoids the disadvantage that the conventional transpedicular and intervertebral disc oblique screw technology can only be used for an anterior or lateral approach and needs to change the patient's body position, and greatly simplifies the operation steps.

Description

A kind of intervertebral fusion cage that adapts to the oblique screw through the pedicle and through the intervertebral disc

technical field

The invention relates to an intervertebral fusion device used for spinal surgery and adapted to be used for transpedicular and intervertebral disc oblique screws.

Background technique

In recent years, a new transpedicular and transvertebral disc oblique screw internal fixation has been reported. This new internal fixation technique has many advantages, such as less trauma, less pain, faster recovery, and fewer complications, and it is the future surgical technique. direction of development. However, two screws are placed obliquely from the posterior edge of the lower vertebral body through the intervertebral space into the middle of the upper vertebral body. The ordinary intervertebral cage is blocked by the screws located in the intervertebral space and cannot be inserted. Mechanical properties and fusion rates of interbody cages. In order to make this new transpedicular and trans-disc oblique screw fixation to achieve comparable mechanical properties and fusion rates to the traditional posterior four-screw and two-rod system, we previously designed a transpedicular and trans-disc oblique screw fixation. Intervertebral cage with "6" shape structure for oblique screw internal fixation (Publication No.: 103263309A; Publication Date: 2013-08-28; Patent No.: 201310196800.0).

However, this "6"-shaped structure enters the intervertebral space through a lateral approach, and it is necessary to change the patient's position during the operation to complete the insertion of the intervertebral cage, which increases the degree of trouble in the operation. Because transpedicular and transdisc oblique screw fixation is performed when the patient is in the prone position, changing the patient's position can be avoided if the intervertebral space is accessed directly through the posterior procedure. However, the current intervertebral cage is basically a cuboid structure. If the intervertebral cage is inserted from the rear, the intervertebral cage occupies the space of the intervertebral space and is blocked by the intervertebral cage. Internal fixation with screws.

SUMMARY OF THE INVENTION

In order to directly enter the intervertebral space through the posterior surgery and avoid changing the patient's position, at the same time, after the intervertebral cage is placed, the percutaneous transpedicular and intervertebral disc oblique screw placement is not blocked. We improved it and designed this transpedicular and transdiscal oblique screw cage.

The present invention is achieved through the following technical solutions:

1. It consists of upper surface, lower surface, left side, right side, rear surface, front surface and angle slope.

2. The angle bevel can be located between the left side and the front surface, or between the front surface and the right side. The angle of the angle bevel is about 15 degrees to 75 degrees, which is just oblique to the transpedicular and intervertebral discs. The oblique angle of the screw is adapted, and the space left by the oblique surface of the angle is sufficient to provide for the placement of the oblique screw through the pedicle and the intervertebral disc, so that the oblique screw through the pedicle and the intervertebral disc does not conflict with the present invention, resulting in blocking the transvertebral disc. The arch root is oblique screw through the intervertebral disc.

3. The upper surface and the lower surface are provided with large holes, which pass through each other, so that the present invention has a hollow structure, which is used for inserting artificial bone or autologous bone.

4. There are several X-ray opaque marking needles on the right side or left side or front surface.

5. There is a holding hole on the front surface, which is used for inserting the holder, which plays the role of holding the present invention.

Description of drawings

Accompanying drawing: Fig. 1: The structure schematic diagram of the present invention.

In the figure: 1. Upper surface; 2. Large hole; 3. Back surface; 4. Lower surface; 5. X-ray opaque marker needle; 6. Angle bevel; 7. Front surface; side; 10. right side.

Detailed ways

Example 1

If transpedicular and transvertebral disc oblique screw fixation combined with unilateral cage placement, under endoscopic or open traditional surgical conditions, through the posterior surgical approach or through the transforaminal surgical approach, The intervertebral disc is removed, the upper and lower endplates are removed, and after sufficient decompression, artificial bone or autologous bone is filled in the large hole 2 of the present invention, and then the present invention is placed. One piece of the present invention between the anterior surface and the right side surface 10, at this time, the angle bevel just leaves the space on the right side for placing the right transpedicular and transvertebral disc oblique screw; if it is a left-side approach , select a piece of the present invention with the angle bevel 6 between the front surface and the left side 9, at this time, the angle bevel just leaves a space on the left side for inserting the left transpedicular and intervertebral disc oblique screw using Placed under the lateral endoscope channel. After the present invention is installed, the position of the present invention is judged by observing the position of the X-ray opaque marker needle (5) on the perspective view through intraoperative X-ray fluoroscopy. After the position is satisfied, the transpedicular and intervertebral disc oblique screws are placed together.

Example 2

If transpedicular and transdiscal oblique screw fixation combined with bilateral cage placement is performed, under endoscopic or open traditional surgical conditions, a posterior surgical approach or a bilateral transforaminal approach is required. path, the intervertebral disc is removed, the upper and lower endplates are removed, and after sufficient decompression, the present invention with the angle bevel 6 between the anterior surface and the right side 10 and the present invention with the angle bevel 6 between the anterior surface and the left side 9 are selected One piece each, artificial bone or autologous bone is filled in the two large holes 2 of the present invention, the present invention with the angle bevel 6 between the anterior surface and the right side 10 is placed through the right approach, and the angle bevel 6 is in the front The present invention between the surface and the left side 9 is placed through the left side approach. After the present invention is implanted, the position of the present invention is judged by observing the position of the X-ray opaque marker needle (5) on the perspective view through intraoperative X-ray fluoroscopy. After the position is satisfied, the transpedicular and intervertebral disc oblique screws are placed together.

Claims (1)

1. An adaptation is through pedicle of vertebral arch intervertebral disc slant screw interbody fusion cage, characterized by: the angle inclined plane is positioned between the front surface and the right side surface, the angle of the angle inclined plane is 15-75 degrees, the upper surface and the lower surface are provided with large holes which are communicated with each other to form a hollow structure, the right side surface is provided with an X-ray opaque marker needle, the front surface is provided with a holding hole, and the angle inclined plane just leaves out a right space and is used for placing a right transpedicular intervertebral disc oblique screw.

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