WO2019013558A1

WO2019013558A1 - Oblique vertebral fusion cage

Info

Publication number: WO2019013558A1
Application number: PCT/KR2018/007879
Authority: WO
Inventors: 강국진; 최윤서
Original assignee: (주)엘앤케이바이오메드
Priority date: 2017-07-13
Filing date: 2018-07-11
Publication date: 2019-01-17

Abstract

The present invention relates to an oblique vertebral fusion cage insertable in an inclined direction between the abdomen and flank. The oblique vertebral fusion cage comprises: a front side wall; a long side wall formed so as to be connected to one side of the front side wall; a short side wall formed so as to be connected to the other side of the front side wall, and being shorter than the long side wall; and a transverse directional wall for connecting the end part of the long side wall on the opposite side from the front side wall, with the end part of the short side wall on the opposite side from the front side wall, wherein the transverse directional wall faces the rear side of a vertebral body, and the long side wall and the transverse directional wall form an acute angle with each other.

Description

Cervical spine fusion cage

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cervical vertebrae fusion cage, and more particularly, to a cervical vertebra fusion cage that can be inserted in an oblique direction between a abdomen and a flank.

The vertebrae consist of 32 to 35 vertebrae and intervertebral discs between the vertebrae, which form the backbone of our body connecting the upper skull to the lower pelvis.

The vertebrae consist of 7 cervical, 12 thoracic, 5 lumbar, 5 sacrum, and 3 ~ 5 coccyx in the upper part, It merges into one sacrum, and 3 ~ 5 spines are united to become one sacrum.

For a long time, one of the treatment methods for the treatment of severe spinal diseases is spinal fusion. This spinal fusion is a surgical procedure in which adjacent vertebral bodies are fused together by inserting a cage that removes the intervertebral disc and replaces it.

In the lumbar spine, the lumbar interbody fusion (PLIF), Transformational Lumbar Interbody Fusion (TLIF) and Direct lateral Lumbar Interbody Fusion (TLIF) Fusion, DLIF, Oblique Lumbar Interbody Fusion (OLIF), and Anterior Lumbar Interbody Fusion (ALIF).

Posterior fusion (PLIF) is a method of incision along the center line of the spine, opening to expose all of the vertebral bodies, removing the posterior side of the vertebra, removing the disc, and inserting the PLIF cage.

Posterior lumbar interbody fusion (PLIF) is the oldest method of lumbar interbody fusion and is a necessary method for two or three intervertebral fusion. However, because of the surgical procedure, there is a high possibility of adhesion to the nerves, ligaments and muscles, a long incision area due to large incision area, and a large aftereffect depending on the person.

The PLIF cage is placed on both sides of a pair of small cages, the smallest of the cages used for all spinal fusion.

Transverse intervertebral disc fusion (TLIF) is a surgical procedure for inserting a disc into a TLIF cage, with a small incision along both sides of the vertebral muscle and exposing the vertebral body at least to the direction of the nerve ball. This surgical technique is suitable for one-sided surgery because of the advantages of less bleeding and shortening of the operation time, but PLIF surgery is necessary when various operations are needed. The TLIF cage is mostly arcuate, so it is inserted into the vertebral body and rotated so that the convex portion of the TLIF cage faces down. The TLIF cage is larger than the PLIF cage, but the supporting area is smaller than the DLIF cage or ALIF cage that will be mentioned later.

Anterior cruciate ligament reconstruction (ALIF) has several advantages such as quick recovery of the operation and no need to worry about adhesion, but it has a disadvantage in that it requires advanced skill because it is incised forward and approaches the spine. have. The ALIF cage has the largest support area among all spinal fusion cages.

To overcome the disadvantages of ALIF, PLIF, and TLIF, the lateral femoral fusion (DLIF) was developed. Lateral lumbar interbody fusion has the advantage that the space between the vertebrae and vertebrae can be widened more widely than the existing incisional lumbar surgery because of the operation through the lateral incision. However, there are problems such as psoas muscle and peritoneum around the operation path, and thigh muscle paralysis when there is a mistake during surgery. The DLIF cage is smaller than the ALIF cage but smaller than the PLIF cage or the TLIF cage.

A safer and more effective method of operation than the lateral femoral fusion is the lateral femoral interbody fusion (OLIF). The lumbar spine (L4) and the fifth lumbar vertebrae (L5), which are difficult to perform as a DLIF operation due to the psoas muscle and peritoneum, ). In addition, the possibility of damaging the nerves that are problematic in the lateral lumbar fusion is remarkably small.

However, since OLIF cage uses a conventional PLIF cage or a cage that is slightly longer than the OLIF cage, the amount of BGM (bone graft material) filled in the window of the cage is small, There is also a disadvantage of.

{Prior Art Document}

{Patent Document}

(Patent Document 1) US 2016-0310294A

(Patent Document 2) US 9474624

(Patent Document 3) KR 1632908B

According to another aspect of the present invention, there is provided a cervical vertebrae fusion cage inserted between a vertebra, comprising: a front wall; And a transverse wall that connects the opposite end of the long side wall of the long side wall and the opposite side end of the front wall of the short side wall, And the long side wall and the lateral wall are at an acute angle with respect to each other.

A connection wall is formed between the front wall and the long side wall, and the connection wall is parallel to the lateral wall.

Further, the height is gradually increased along a direction perpendicular to the transverse wall.

The connecting portion between the transverse wall and the long side wall is characterized in that the height gradually decreases along a direction orthogonal to the front wall.

The present invention can manufacture a cervical spine fusion cage which can be stably fixed to the vertebra without using a separate plate.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a cervical spine fusion cage according to an embodiment of the present invention; FIG.

2 is a plan view of Fig.

FIG. 3 is a view showing a state in which the cervical spinal fusion cage of FIG. 1 is applied.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. In the drawings, the same reference numerals are used to designate the same or similar components, and the same reference numerals will be used to designate the same or similar components. Detailed descriptions of known functions and configurations are omitted.

In FIG. 1, reference numeral 100 denotes a lateral femoral spinal fusion cage according to an embodiment of the present invention.

As shown in FIG. 1, the lateral spinal fusion cage 100 includes a main body 102 having a window 103 inserted between the vertebrae 10.

The body 102 may be made of a polymer material harmless to the human body such as polyether ether ketone (PEEK), or may be formed by bonding segments of a polymer material and segments of a metal material together. At this time, the metal is made of a metal material which is harmless to human body such as titanium or stainless steel. Of course, the entire body may be made of a metal material.

The main body 102 includes a front wall 104, a long wall 106 formed to be connected to one side of the front wall 104, and a long wall 106 formed to be connected to the other side of the front wall 104, And a transverse wall 108 connecting the end of the long side wall 106 opposite the front wall 104 and the end of the short side wall 108 opposite the front wall 104. [ (110). The transverse wall 110 is directed rearward of the vertebral body 10 and the long side wall 106 and the transverse wall 110 are at an acute angle with respect to each other.

A connecting wall 107 is formed between the front wall 104 and the long wall 106 and the connecting wall 107 is parallel to the lateral wall 110.

That is, the transverse wall 110 corresponds to the front side wall of the conventional ALIF cage 20, and the connecting wall 107 can be formed to correspond to the rear side wall of the conventional ALIF cage 20. [ The vertical distance between the long side wall 106 and the short side wall 108 determines the width at which the midsagittal spinal fusion cage 100 is inserted. Wherein the long side wall 106 and the short side wall 108 are substantially parallel to each other.

In addition, the midsagittal spinal fusion cage 100 is formed so that its height gradually increases along a direction orthogonal to the lateral wall 110, similar to the conventional ALIF cage 20. That is, the rear side of the patient is thinly disposed and the front side is thick. The OLIF cage is similar to the PLIF cage in that the overall OLIF cage has a uniform overall thickness.

Such a special shape of the main body 102 makes it possible to insert into the side of the front side while circumscribing the conventional ALIF cage depicted in FIG. Further, the window 103 of the main body 102 can be filled with sufficient BGM.

The connecting portion 112 between the transverse wall 110 and the long side wall 106 is gradually lowered in the direction of insertion, that is, along the direction orthogonal to the front wall 104, , It is somewhat advantageous when the cervical spine fusion cage 100 is first inserted between the vertebral bodies.

Spikes may be formed on the upper surface of the main body 102. The spikes are intended to be stably positioned between the vertebrae 10 and may be disposed parallel to the transverse walls 110.

A tool mounting portion 114 is formed on the front wall 104 to connect a tool such as a holder. In addition, a tool guide hole 116 is formed around the tool mounting portion 114 so that the tool mounting portion 114 can be stably inserted without being rotated around the tool mounting portion 114 when the frontal vertebrae fusion cage 100 is inserted .

8 is a view showing a state in which the front side vertebrae fusion cage 100 is inserted into the vertebral body 10 and an insertion angle? Is 25 to 45 degrees, preferably 35 degrees Size. Accordingly, when the cage entry space is secured by a mechanism such as a retractor, the midsagittal spinal fusion cage 100 can be seated in the space between the vertebrae 10.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims. It can be understood that

[Description of Symbols]

10: vertebral body

20: Virtual ALIF cage outer line

100: Spine fusion cage

102:

103: Window

104: Front wall

106: Long side wall

107: Conneting wall

108: Short side wall

110: Lateral wall

112:

114: Tool mounting portion

116: Tool guide hole

Through the present invention, it is possible to perform a bilateral spinal fusion with fewer post-operative complications and faster recovery time.

Claims

In a cervical spinal fusion cage inserted between vertebrae,

A front wall,

A long side wall formed to be connected to one side of the front wall,

A short side wall formed to be connected to the other side of the front wall and having a shorter length than the long side wall,

And a transverse wall connecting the opposite side end of the front wall of the long side wall and the opposite side end of the front side wall of the short side wall,

Wherein the transverse wall faces the back of the vertebra, and the long side wall and the transverse wall form an acute angle with respect to each other.
[2] The apparatus of claim 1, wherein a connecting wall is formed between the front wall and the long wall,

Wherein said connecting wall is parallel to said transverse wall. &Lt; RTI ID = 0.0 > 18. < / RTI >
The cervical vertebrae fusion cage of claim 1, wherein the height gradually increases along a direction perpendicular to the transverse wall.
2. The cervical vertebrae fusion cage of claim 1, wherein the connection between the transverse wall and the longitudinal wall is progressively lowered in height along a direction perpendicular to the front wall.