KR101664149B1 - Spine fixing device - Google Patents

Abstract

The present invention relates to a spinal fixation device, comprising: a fixed plate formed to cover a plurality of vertebrae and fixed to a vertebra; and a plurality of coupling holes formed in the fixed plate to fix the fixed plate to the vertebra A support member which is adjacent to the coupling hole and resiliently supports the screw so that the screw is not separated from the fixing plate; and a support member continuously formed on the upper side of the coupling hole, And a spacing groove formed continuously to one side of the insertion groove and providing a space for elastically deforming the support member when the screw is engaged. Accordingly, the present invention has a supporting member for preventing the screw from being detached from the fixing plate, the supporting member can be elastically deformed, the screw can be elastically supported, and the detachment / attachment of the supporting member onto the fixing plate An insertion groove and a spacing groove are formed on the fixing plate so as to facilitate detachment of the screw, thereby improving durability and functionality.

Description

Spine fixing device

BACKGROUND OF THE INVENTION 1. Field of the Invention [0002] The present invention relates to a spinal fixation device, and more particularly, to a spinal fixation device having a support member elastically supporting a screw so that a screw is not separated from a fixation plate.

Generally, the vertebra is usually made up of 24 bones (except for the sacrum), which are connected by joints, and between the joints, when the body moves or joints are activated, the impact is absorbed, A disc for supporting is located.

This configuration not only supports the posture of the human being while buffering, but also serves as the basis of exercise and protects all organs of the organs.

However, as the vertebrae continue to suffer external artificial factors, degenerative or abnormal postures, when the vertebrae are injured or distorted, the nerves passing through the vertebral column are pressed, resulting in severe pain.

In other words, a patient with a partially injured spinal column can not perform the necessary activities for personal life, and even if the degree of damage is not severe, the damaged portion of the vertebrae is pressed or contacted to another adjacent portion, causing pain.

For this reason, a spinal fixation device consisting of a spinal fixation plate and a screw for securing it to the vertebrae should be mounted on the damaged or damaged part of the vertebrae so that the damaged part is not pressed or pressed.

However, the conventional spinal fixation apparatus has a problem in that a back-out phenomenon in which a combined screw is released and backward due to a movement or an action after the spinal fixation plate is performed on the spine often occurs .

Until recently, studies on such a spinal fixation device have been focused on minimizing such a back-out phenomenon, and as a conventional technique therefor, Korean Patent Registration No. 10-0974498, " have.

The above-mentioned prior art has a plate provided with a curvature so that a lower surface thereof is brought into contact with a plurality of cervical vertebrae, a plurality of holes formed in the plate corresponding to a predetermined portion of the plurality of cervical vertebrae in the plate, And a plurality of screws inserted into the cervical vertebrae and fixed to predetermined portions of the plurality of cervical vertebrae, the cervical vertebrae comprising: at least one cap insertion hole formed between the plurality of holes in the upper surface of the plate; And one or more elastic caps inserted into the at least one cap insertion hole so as not to be separated from the hole of the plurality of holes, respectively, wherein the at least one elastic cap comprises an escape prevention projection extending upward by a predetermined length from one of the plurality of holes And at least one projecting portion Behavior is characterized in that.

In the prior art, since the screw can be inserted immediately after the cap is fastened, it is possible to fasten the cap to the plate before the surgery or during the manufacture of the apparatus, thereby eliminating the need for additional operation for cap fastening during surgery, So that the accuracy of the operation can be improved.

However, in the prior art, the elastic cap is provided so that the screw is not separated from the hole, and the end portion of the elastic cap is extended to form the separation preventing protrusion, so that the separation preventing projection catches the head portion of the screw, So as not to be separated.

However, since the above structure only catches a part of the head portion of the screw, not only the screw can be completely prevented from separating from the hole, but also the screw is pressed in only one direction, There is a possibility that the spine can not be fixed properly due to a high possibility of departure after the wrong direction.

In addition, the above-mentioned prior art has a cap insertion hole for inserting an elastic cap, the elastic cap is repeatedly formed in a U-shape or a V-shape, and an escape preventing protrusion is formed at an end, There is a tricky problem.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems and it is an object of the present invention to provide a spinal fixation device capable of preventing detachment of a screw and improving durability and functionality by having a support member elastically supporting the screw so as not to separate the screw from the fixation plate .

To achieve the above object, according to the present invention, there is provided a spinal column comprising: a fixed plate formed to cover a plurality of vertebrae and fixed to a vertebra; and a plurality of coupling holes formed in the fixed plate, A plurality of screws; a support member coupled to the coupling hole and elastically supporting the screw so that the screw is not separated from the fixing plate; and an insert formed continuously on the upper side of the coupling hole, And a spacing groove formed continuously to one side of the insertion groove and providing a space for resiliently deforming the support member when the screw is engaged.

In addition, it is preferable that the support member is formed of an elastic material, and more preferably, the support member is formed in a ring shape having an open end.

More specifically, the support member has an elliptical shape in a state where the support member is fixedly inserted into the insertion groove, and one side of the support member is elastically deformed when the screw is engaged, so that the support member elastically deforms. It is preferable that the screw is restored to an elliptical shape to elastically support the head of the screw.

Here, the support member is composed of an elastic opening and closing part formed in an elliptical shape, extending in the major axis direction and corresponding to the shape of the insertion groove and being flatly fitted and fixed to the insertion groove, and an elastic support part, And the elastic deforming portion is elastically deformed into the spacing groove by opening and closing the elastic opening and closing portion.

The fixing plate may further include a coupling hole for temporarily fixing the fixing plate between the coupling holes.

In addition, it is preferable that a part of the plurality of coupling holes is formed to be inclined at one side so that the angle of the screw can be adjusted.

Preferably, the screw is formed of a variable screw or a fixing screw by adjusting the thickness of the neck portion.

Here, the spinal fixation apparatus has three levels (number of screws: 8), four levels (four screws), two levels (six screws), three levels Number of 10).

The present invention has a supporting member for preventing the screw from being detached from the fixing plate, and is capable of elastically deforming the supporting member, rigidly supporting the screw, and facilitating detachment and attachment of the supporting member onto the fixing plate And an insertion groove and a spacing groove are formed on the fixing plate to prevent the screw from coming off, thereby improving durability and functionality.

In addition, since the support member according to the present invention can be easily inserted and fixed into the insertion groove through the spacing groove on the fixing plate, the support member can be fastened before the surgery or during the manufacturing of the apparatus, Is reduced and the accuracy of the operation can be improved.

1 is a perspective view of a spinal fixation device according to the present invention;
2 is an exploded perspective view of a spinal fixation device according to the present invention;
3 is a longitudinal sectional view of a spinal fixation device according to the present invention.
Figure 4 - A cross-sectional view of a spinal fixation device according to the present invention.
5 is a plan view of a spinal fixation device according to the present invention;
6 is a detailed plan view of an insertion groove and a spacing groove of a vertebra fixing device according to the present invention;
Figure 7 is a view showing various embodiments of a screw of a spinal fixation device according to the present invention;

The present invention relates to a spinal fixation device capable of preventing detachment of a screw and improving durability and functionality by having a support member elastically supporting the spinal fixation plate so that the screw is not separated from the spinal fixation plate.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings. FIG. 1 is a perspective view of a spinal fixation apparatus according to the present invention, FIG. 2 is an exploded perspective view of a spinal fixation apparatus according to the present invention, FIG. 3 is a longitudinal sectional view (A- FIG. 4 is a cross-sectional view (B-B 'in FIG. 1) of a spinal fixation device according to the present invention, FIG. 5 is a plan view of a spinal fixation device according to the present invention, And FIG. 7 is a view illustrating various embodiments of a screw of a spinal fixation device according to the present invention. Referring to FIG.

As shown in the drawings, the present invention includes a fixed plate 100 formed to cover a plurality of vertebrae and fixed to a vertebra, and a plurality of coupling holes 110 formed in the fixed plate 100, A plurality of screws 200 for fixing the fixing plate 100 to the vertebrae 200 and an elastic support member 200 connected to the coupling hole 110 so as to prevent the screw 200 from being detached from the fixing plate 100. [ An insertion groove 400 continuously formed on the upper side of the coupling hole 110 and formed to be fitted and fixed to the supporting member 300 and a coupling member 400 formed continuously to one side of the insertion groove 400 And a spacing groove 500 for providing a space for resiliently deforming the support member 300 when the screw 200 is coupled.

The vertebra fixation apparatus according to the present invention performs a treatment or correction for various vertebra diseases (disc herniation, disc, dislocation, fracture, deformation, etc.) by connecting and fixing a plurality of adjacent vertebrae to minimize movement thereof .

First, the fixation plate 100 is formed to have a size enough to cover a plurality of vertebrae, at least two or more vertebrae, and corresponds to the shape of vertebrae to be treated, Portion) is concave.

Also, the fixing plate 100 is formed of a material that is friendly to the human body, and is formed of titanium, a titanium alloy, stainless steel, or the like.

In addition, the fixing plate 100 may be formed with a treatment hole 130 for inserting a bone material into the connecting portion of each vertebrae, And is formed in a central region of the fixing plate 100 except for a region where the coupling hole 110 is formed.

The fixing plate 100 is formed with a relatively narrow width in the area of the treatment hole 130 except for the area of the screw 200 so as to apply an elastic force to the fixing plate 100 as a whole. This is because, if the fixing plate 100 is too hard, the spine may be damaged when an impact is generated in the spine. Therefore, the fixing plate 100 may be provided with a weak portion, .

A coupling hole 120 for temporarily fixing the fixing plate 100 is further formed between the coupling holes 110 of the screw 200 of the fixing plate 100.

The fastening plate 120 is temporarily fixed by a small screw before the full-scale operation, so that accurate operation can be performed.

The screw 200 is coupled through a plurality of coupling holes 110 formed in the fixing plate 100 to fix the fixing plate 100 to the vertebra. Since at least two or more vertebrae are connected and fixed, at least six screws 200 and a coupling hole 110 are formed.

The coupling hole 110 is formed to penetrate through the fixing plate 100. When the screw 200 is inserted and the screw 200 is fully inserted into the vertebrae, And is seated and engaged in the hole 110. As shown in the figure, in an embodiment of the present invention, six coupling holes 110 are provided, and six screws 200 are combined.

Here, the spinal fixation apparatus has three levels (number of screws: 8), four levels (four screws), two levels (six screws), three levels 10), and one embodiment of the present invention is a two-level spinal fixation device.

The coupling hole 110 is formed at one side of the fixing plate 100 with respect to the fixing plate 100 so that the angle of the screw 200 can be adjusted within a predetermined clearance range according to the angle at which the screw 200 is stuck to the vertebrae Can be formed to be inclined.

The screw 200 capable of adjusting the angle may be formed of a variable screw that freely rotates in the coupling hole 110 of the fixing plate 100 and is movable even after the insertion, May be formed as a fexed screw which can be freely adjusted in angle before inserting the fixing plate 100 but can not be moved after fully inserted. The difference in the shape of the variable screw and the fixing screw can be determined by adjusting the thickness of the neck portion of the screw so as to be freely moved and fixed.

7 (a) is a variable screw having a narrow neck portion, in which the neck portion of the screw 200 is formed to have a narrow thickness, and a screw head portion between a support member and a coupling hole to be described later is positioned, So that the screw 200 can be freely rotated in the coupling hole and can be moved even after the insertion.

7 (b) is a fixing screw having a large neck portion. The thickness of the neck portion of the screw 200 is wide, and there is a space in which the head of the screw positioned between the supporting member and the engaging hole can move So that the screw 200 is not moved and fixed in the coupling hole.

In one embodiment, the coupling hole 110 as a whole is formed such that the screw 200 is inclined inward along the longitudinal axis of the fixing plate 100, and is coupled to the coupling holes 110 at both ends The screw 200 is inclined in the major axis direction while being inclined outwardly.

 The coupling hole 110 is formed to correspond to the shape of the head of the screw 200. The coupling hole 110 is formed to have a smaller diameter in the lower direction and a wider diameter in the upper direction, The fixing plate 100 and the vertebrae are securely fixed and the angle of the screw 200 is easily adjusted.

Here, it is preferable that the diameter of the upper end portion of the screw 200 is larger than the diameter of the lower end portion to facilitate interaction with the support member 300, which will be described later.

The support member 300 is coupled to the coupling hole 110 to elastically support the screw 200 so that the screw 200 is not separated from the fixing plate 100. The screw 200 The support member 300 elastically supports the head of the screw 200 to prevent the screw 200 from being unintentionally released from the fixing plate 100. [ will be.

The supporting member 300 is formed of an elastic material so that when the lower end portion of the screw 200 is coupled to the coupling hole 110, the supporting member 300 does not apply any force to the screw 200 When the lower end of the head starts to contact with the screw 200 when the screw 200 is engaged, the support member 300 gradually flares and reaches the upper end of the head to be fully opened. When the screw 200 is coupled to the coupling hole 110, the support member 300 is returned to its original shape and presses the head of the screw 200, It is possible to prevent the guide plate 100 from separating from the stationary plate 100.

That is, when the support member 300 formed of an elastic material is elastically deformed and restored and the screw 200 is fastened to the coupling hole 110, the head of the screw 200 is elastically supported, 100 so that the screw 200 is not released.

Further, the support member 300 is formed in a ring shape having an open end at one end, more preferably an elliptical ring shape, and is elastically deformed while one end of the screw 200 is opened when the screw 200 is engaged. The end is closed again and restored.

The supporting member 300 is coupled adjacent to the coupling hole 110 to which the screw 200 is coupled. More specifically, the supporting member 300 is inserted into the insertion groove 400 formed continuously above the coupling hole 110, The support member 300 is fitted and fixed.

That is, the support member 300 is inserted and fixed at both ends of the support member 300 into the insertion groove 400 formed corresponding to the longitudinal shape of the support member 300, 400 are formed with grooves of the thickness of the support member 300 in the horizontal direction adjacent to the upper surface of the fixing plate 100 so as to exert the elastic supporting force without releasing the fixed supporting member 300, Except for the inlet where the support member 300 is inserted.

The spacing groove 500 is formed continuously to one side of the insertion groove 400 and provides a space for allowing the support member 300 to be elastically deformed when the screw 200 is engaged.

Specifically, the spacing groove 500 is continuously formed on the upper side of the coupling hole 110 to provide a space for resiliently deforming the supporting member 300. When the supporting member 300 is elastically deformed, Since the end of the member 300 is opened and the support member 300 is expanded in the uniaxial direction, that is, resiliently deformed similarly to the shape of the circular shape, the spacing groove 500 functions as a space for accommodating the same.

That is, the insertion hole is formed so that the support member 300 can be inserted and fixed without being elastically deformed, and the spacing groove 500 is formed to correspond to the elastic deformed shape of the support member 300.

In one embodiment, when the support member 300 is formed in the shape of an elliptic ring, the insertion groove 400 is formed in an elliptical shape as a whole and is formed only in a shape corresponding to an arc of both ends in an elliptical shape in the major axis direction, The spacing grooves 500 are formed in an elliptical shape so as to be in the major axis direction in a direction perpendicular to the direction in which the two ellipses are perpendicularly intersected.

6, the insertion groove 400 is formed with a closed structure (not shown) except for a portion where the support member 300 is inserted so that the support member 300 can be inserted and fixed The spacing groove 500 has an upper surface opened.

When the support member 300 is inserted into the insertion groove 400, the spacing groove 500 may be formed in a position where the support member 300 is elastically deformed, (500) and then coupled to the insertion groove (400) in a rotating manner. When the support member 300 is separated from the support member 300, the support member 300 is rotated 90 degrees in the insertion groove 400 and is coupled to the spacing groove 500, so that the long axis direction of the support member 300 and the long axis direction of the spacing groove 500 And are separated.

The support member 300 is elliptical in a state where the support member 300 is fitted in the insertion groove 400 and one side of the support member 300 And is resiliently deformed when the screw 200 is coupled to the inside of the coupling hole 110. The screw 200 is then restored to an elliptical shape to elastically support the head of the screw 200 .

The most suitable shape of the support member 300 to be engaged with the insertion groove 400 and the spacing groove 500 in this form is an elliptical shape and extends in the major axis direction, An elastic opening and closing part 310 which is formed in a flat shape corresponding to the shape of the elastic opening and closing part 310 and which is fitted and fixed to the insertion groove 400 and an elastic supporting part 320, And an elastic deforming part 330 which is elastically deformed into the spacing groove 500 according to opening and closing.

That is, the support member 300, which is formed in a generally elliptical shape, is fitted and fixed in the insertion groove 400 formed on the upper side of the coupling hole 110. The elastic opening and closing part 310, which is extended to one side of the ellipse, The elastic supporting portion 320 is extended to the other side in the major axis direction of the ellipse so as to support the elastic opening and closing portion 310 so that elastic deformation of the elastic opening and closing portion 310 is smoothly performed .

The elastic opening and closing part 310 and the elastic supporting part 320 are flatly formed so as to have a large contact area with the fixing plate 100 in order to allow an appropriate elastic supporting force to act on the screw 200 coupled to the lower side.

The elastically deformable part 330 is formed in a shape having a relatively large radius of curvature (short axis direction of the ellipse) so as to be deformed and restored by the coupling of the screw 200, 320). ≪ / RTI >

As described above, according to the present invention, a plurality of adjacent vertebrae are connected and fixed to each other to minimize movement thereof, thereby performing treatment or correction for various vertebra diseases. The support member is provided so as not to separate the screw from the fixation plate An insertion groove and a spacing groove are formed on the fixing plate so that the supporting member can be elastically deformed, the screw can be firmly resiliently supported, and the supporting member can be easily attached to and detached from the fixing plate, So that durability and functionality can be improved.

Particularly, the support member is made of an elastic material, so that when the lower end portion of the screw is coupled to the engagement hole, the support member does not apply any force to the screw, The support member gradually flares and reaches the upper end of the head portion and is fully opened. Then, when the coupling of the screw to the coupling hole is completed, the support member is resiliently restored to its original shape again, thereby elastically supporting the head of the screw, thereby preventing the screw from being detached from the fixing plate will be.

Further, since the support member can be easily inserted and fixed into the insertion groove through the spacing groove on the fixing plate, the support member can be fastened before the surgery or during the manufacturing of the device, so that no additional operation is required during the operation, The accuracy of the operation can be improved.

100: fixing plate 110: engaging hole
120: Coupling ball 200: Screw
300: support member 310: elastic opening /
320: elastic support portion 330: elastic deformation portion
400: insertion groove 500: spacing groove

Claims (9)

A fixation plate formed to cover a plurality of vertebrae and fixed to the vertebra;
A plurality of screws coupled through a plurality of coupling holes formed in the fixed plate to fix the fixed plate to the vertebra;
A support member coupled adjacent to the coupling hole to elastically support the screw so that the screw is not separated from the fixing plate;
An insertion groove continuously formed on the upper side of the coupling hole, the insertion groove being formed to fix the support member; And
And a spacing groove formed continuously to one side of the insertion groove and providing a space for resiliently deforming the supporting member when the screw is engaged,
The fixing plate further includes a coupling hole for temporarily fixing the fixing plate between the coupling holes,
Wherein the support member is formed in an elliptical shape,
Wherein the support member includes an elastic opening and closing portion extending in the major axis direction and formed correspondingly to the shape of the insertion groove and fixed to each of the insertion recesses,
Wherein the support member is further provided with a resiliently deformable portion formed on the short axis side and elastically deformed into the spaced groove according to opening and closing of the elastic opening and closing portion,
Wherein the elastic deforming portion is formed to have a narrow cross-sectional area as compared with the elastic opening and closing portion and the elastic supporting portion. The image forming apparatus according to claim 1,
Wherein the spinal column is formed of an elastic material. 3. The apparatus according to claim 2,
And the end portion is formed in an open ring shape. The image forming apparatus according to claim 3,
An elliptical shape in a state of being fitted and fixed in the insertion groove,
One side of the screw is elastically deformed to expand into the spacing groove when the screw is engaged,
And when the screw is coupled to the inside of the coupling hole, the screw is restored to an elliptical shape to elastically support the head of the screw. delete delete The connector according to claim 1, wherein a part of the plurality of engagement holes
Wherein one side is inclined so as to adjust the angle of the screw. The screw according to claim 1,
And the neck portion is formed of a variable screw or a fixing screw by adjusting the thickness of the neck portion. 9. The spinal fixation device according to any one of claims 1 to 4 and 7 to 8,
It is realized with 1 level (4 screws), 2 levels (6 screws), 3 levels (8 screws), 4 levels (10 screws) depending on the number of screws .

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