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Artificial vertebral plate and spine internal fixing device

A fixation device and lamina technology, applied in the field of medical devices, can solve problems such as insufficient fixation, increased damage to patients, and small contact area, and achieve the effects of saving operation time, simplifying installation steps, and preventing adverse effects

Pending Publication Date: 2018-12-14
PEKING UNION MEDICAL COLLEGE HOSPITAL CHINESE ACAD OF MEDICAL SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Existing lamina usually requires special screws or wires for fixation, such as the "artificial lamina" of patent CN2880012Y and the "artificial lamina for spinal laminectomy" of patent application CN201710483156.3. Complexity or unnecessary damage to the patient; although the patent CN107411854A is fixed by a buckle, which avoids unnecessary damage to the patient by punching and installing, but the contact area is small only through the buckle connection, and the fixation is not stable enough. Buckle releases easily from titanium rod

Method used

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  • Artificial vertebral plate and spine internal fixing device
  • Artificial vertebral plate and spine internal fixing device
  • Artificial vertebral plate and spine internal fixing device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] see Figure 1 to Figure 7 As shown, this embodiment provides an artificial lamina, which is used to combine with a spinal internal fixation screw rod system to fix the part of the spine where the lamina has been removed, and to prevent scar tissue from connecting the dura mater and nerve roots with the surrounding tissue, In particular, the dorsal sacrospinous muscles stick together and compress the nerves. It is also convenient for secondary surgery.

[0036] The artificial lamina in this embodiment includes a lamina body 1 and a lamina fixing device 2, and the lamina body 1 is an arched structure with a middle convex (the lamina body can also be a flat plate structure, which can block scar tissue), The arc of the arch is the same as that of the normal vertebral plate of the human body. Preferably, it can also be designed with various arcs to choose from, so as to meet the needs of different human bodies.

[0037] Two fixing holes 11 are opened on both sides (the fix...

Embodiment 2

[0044] see Figure 8 and Figure 9 The artificial vertebral plate in this embodiment includes a vertebral plate body 1 and a vertebral plate fixing device 2. The vertebral plate body 1 is an arched structure with a convex middle, and the arc of the arch is the same as that of a normal human vertebral plate.

[0045] Two fixing holes 11 are opened on both sides, and the positions of the fixing holes 11 on both sides are correspondingly arranged; the fixing holes 11 are provided with internal threads. The four corners of the vertebral body 1 are respectively provided with accommodating grooves 12, which can be used for accommodating the nail cap of the pedicle screw 3 when the vertebral plate is fixed to the screw rod system. It is designed as a semi-circular groove or an arc-shaped groove that is compatible with the 3 screw heads of the pedicle screw, so that the lamina body and the screw rod system can be more closely combined. The accommodating groove 12 can partially accom...

Embodiment 3

[0051] Embodiment 3 provides a spinal internal fixation device, such as Image 6 and Figure 7 The illustrated embodiment includes the artificial lamina described in Embodiment 1, and the technical features of the artificial lamina disclosed in Embodiment 1 are also applicable to this embodiment, and the technical features of the artificial lamina disclosed in Embodiment 1 will not be repeated. describe.

[0052] The spinal internal fixation device provided in this embodiment includes a screw rod system and an artificial lamina.

[0053] The screw rod system and the artificial lamina are fixed on the titanium rod 4 through the lamina fixing device 2 of the artificial lamina. The spinal internal fixation device simplifies the installation steps of the artificial lamina, reduces excessive damage to the vertebral body of the patient, improves the firmness of the lamina installation, and increases the stability of the spinal internal fixation system.

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Abstract

The invention discloses an artificial vertebral plate, which comprises a vertebral plate body and a vertebral plate fixing device. The vertebral plate body is provided with at least two fixing holes in each of the two sides thereof, and the fixing holes in the two sides are arranged correspondingly. An internal thread is arranged in each fixing hole. The vertebral plate body is provided with accommodating slots in the four corners thereof. The vertebral plate fixing device includes a fixing block, a screw rod, a nut and a jackscrew. The fixing block is provided with a transverse through hole,a longitudinal hole which is arranged from the upper surface and a groove which can hold a titanium rod. The transverse through hole and the longitudinal hole are communicated, and are provided with internal threads inside. The external thread of the screw rod is matched with the internal thread of the transverse through hole, and the screw rod can pass through the transverse through hole. The external thread of the jackscrew is matched with the internal thread of the longitudinal hole, and the jackscrew can be screwed into the longitudinal hole. The external thread of the screw rod is matchedwith the internal thread of the nut, and the screw rod can pass through the nut. The external thread of the screw rod is matched with the internal threads of the fixing holes, and the screw rod can pass through the corresponding fixing holes. The invention further discloses a spine internal fixation device, which comprises the artificial vertebral plate.

Description

technical field [0001] The invention relates to the technical field of medical devices, in particular to an artificial lamina and a spinal internal fixation device. Background technique [0002] Laminectomy is a more common operation in some spinal degenerative diseases and some trauma to the posterior column of the spine. Most patients' symptoms can be relieved for a long time after surgery, but some patients have symptoms of postoperative pain recurrence. One of the main reasons is the fibrosis around the dura mater and nerve roots in the laminectomy area. A large number of scars make the dura mater and nerve roots adhere to the surrounding tissues, especially the sacrospinous muscle on the back side, which involves compressing the nerves. This caused great difficulty in re-operation. In recent years, artificial laminae have been used in posterior spinal surgery to prevent scarring and maintain the stability of the back of the spine. [0003] Existing lamina usually requ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61F2/44A61B17/70
CPCA61B17/7064A61B17/7074A61F2/44A61B2017/7073
Inventor 刘勇周熹仉建国王升儒黄振飞李政垚
Owner PEKING UNION MEDICAL COLLEGE HOSPITAL CHINESE ACAD OF MEDICAL SCI
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