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Interspinal spacer

A vertebra and pad technology, applied in the direction of internal bone synthesis, spinal implants, internal fixators, etc., can solve the problems of damaged bone tissue, complex shape, and troublesome operation.

Inactive Publication Date: 2006-06-21
HOYA CORP +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] However, when the intervertebral liner of this structure is fixed between the protrusions of the vertebrae, since the ears are fixed to the protrusions of the vertebrae with screws, there is a problem of damaging healthy bone tissue. In addition, the shape is complicated and the surgical operation is difficult. trouble

Method used

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Examples

Experimental program
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Embodiment Construction

[0044] Hereinafter, the intervertebral liner of the present invention will be described in detail based on preferred embodiments shown in the accompanying drawings.

[0045] figure 1 It is a perspective view showing an example of a block constituting the intervertebral pad of the present invention. figure 2 a is a plan view, 2b is a side view, image 3 and Figure 4 Each is a diagram showing the state of use of the intervertebral pad of the present invention.

[0046] In the following description, unless otherwise stated, the intervertebral spacer is inserted between the vertebral protrusions of the patient as a basis, and the directions are specified.

[0047] That is: weigh the patient's head ( figure 1 , figure 2 a, figure 2 b, image 3 and Figure 4 The upper side of the middle) is "upper", which is called the foot ( figure 1 , figure 2 a, figure 2 b, image 3 and Figure 4 The lower side in ) is "down".

[0048] Such as image 3 and Figure 4 As shown...

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Abstract

The present invention provides an intervertebral spacer which can be reliably held between vertebral protrusions and which can properly maintain the interval between adjacent vertebral protrusions. In particular, it provides a spinal interosseous liner that can perform low-invasive surgery without extensive bone or soft tissue resection. An intervertebral liner (1) according to the present invention can be inserted between a vertebral protrusion (101) and a vertebral protrusion (102), and is characterized in that it is composed of a block (2) and has a In the state between (101) and the above-mentioned vertebral process (102), the recesses (21) respectively accommodate a part of the upper and lower above-mentioned vertebral process. The recess (21) is formed on the entire periphery of the block (2). The bottom surface of the recess (21) is shaped like an arc. The depth of the recess (21) is 0.5-10 mm. A groove-shaped recess (21) is made with a width of 1-15 mm. The block (2) is roughly cylindrical in shape.

Description

technical field [0001] The present invention relates to intervertebral liners. Background technique [0002] For example, in spinal canal stenosis, when there is degeneration of the intervertebral plate or deformed intervertebral arthrosis between the vertebral body and vertebral body, secondary deformation of the vertebral body and deformation of the spine, there is a cauda equina and nerve root caused by The morbidity of the disorder. [0003] In the treatment of such spinal canal stenosis, the denatured intervertebral lamina is removed from the intervertebral body, and one's own bone is transplanted into the intervertebral space from which the intervertebral lamina has been removed to fix the vertebral body. [0004] However, grafting only bone between the vertebral bodies creates instability in the spine due to resorption of the grafted bone before the bone heals. [0005] As a way to prevent this instability, intervertebral spacers can be inserted between the vertebra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61F2/44A61B17/70
CPCA61B17/7053A61B17/7062A61F2/44
Inventor 中岛武彦岩崎喜信飞騨一利
Owner HOYA CORP