KR101504260B1 - Apparatus for fixing a cervical spine having self tension part - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cervical spine fixation device for use in orthopedic surgery or neurosurgery, An expanding groove formed through the plate between the first and second plates; A tension member formed inside the extension groove to apply a force to push the guide toward the center of the plate; A channel groove formed at a boundary between the insertion hole and the extension groove and having a stepped surface formed on both sides; A guide coupled to the channel groove and pivoting left and right on the channel groove and locking the screw inserted into the insertion hole by being pivoted back and forth due to a pushing force of the tension portion; The present invention relates to a cervical spine fixation device having a self-tensioning portion.

Description

TECHNICAL FIELD [0001] The present invention relates to a cervical spine fixation device having a self-

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cervical spine fixation device for use in orthopedic surgery or neurosurgery, An expanding groove formed through the plate between the first and second plates; A tension member formed inside the extension groove to apply a force to push the guide toward the center of the plate; A channel groove formed at a boundary between the insertion hole and the extension groove and having a stepped surface formed on both sides; A guide coupled to the channel groove and pivoting left and right on the channel groove and locking the screw inserted into the insertion hole by being pivoted back and forth due to a pushing force of the tension portion; The present invention relates to a cervical spine fixation device having a self-tensioning portion.

Generally, in orthopedic or neurosurgical treatment, cervical disc disease, cervical disc, cervical spondylosis, cervical vertebral fracture, etc., should be fixed so that each cervical vertebrae does not move. A cervical fixation device consisting of a plate and a screw that fixes the plate to the cervical vertebrae is used.

The procedure of the cervical spine fixation device will be briefly described. After the incision is made at the anterior part of the patient's neck and the cervical vertebra is exposed, the cervical disc of the affected part is removed, and a procedure such as a cage is performed, The cervical spine fixation device is operated in such a manner that the plate is placed on the upper and lower vertebrae of the cage-inserted portion and fixed with screws.

The cervical fixation device described above fixes the cage inserted between the vertebrae by the fixing force of the screw and the supporting force of the plate so as not to move.

However, due to the patient's activity after the procedure, the screws fixed to the vertebral body may be loosened and retracted from the plate. This may cause the vibration of the cage, which may act as an impediment to the recovery of the patient.

Therefore, in order to prevent the screw of the cervical spine fixture from being pulled backward, the cervical plate system of the Korean Patent Laid-Open No. 10-2009-86387 (known technology 1) and Korean Patent Laid-open Publication No. 10-2005-11167 A technique of a device (known technology 2) is known.

The known art 1 has a rotary element installed on a plate of a cervical plate system so as to be insertable into a hole of a screw. In the known art 2, a head portion of a fixing screw And a head fixing member is provided.

However, since a rotary element (known technology 1) and a head fixing member (known technology 2) which are components for preventing the retraction of the screws of the known technologies 1 and 2 are essentially used, the number of parts is increased correspondingly However, there is a disadvantage in that the structure and operation are complicated, and further, the manufacturing cost of the cervical fixation device is increased, and the possibility of malfunction of the device can not be excluded.

SUMMARY OF THE INVENTION The present invention has been made to overcome the above-mentioned problems of the prior art, and it is an object of the present invention to fix a fixation screw inserted at various angles on a plate during a procedure of a cervical spine fixation device, SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and it is an object of the present invention to provide a cervical spine fixation device capable of easily performing a fixation device operation.

According to an aspect of the present invention, there is provided a cervical spine fixation device including: an enlarged groove formed by inserting a screw into at least one insertion hole formed in a plate and passing through a plate between a center of the insertion hole and a plate; A tension member formed inside the extension groove to apply a force to push the guide toward the center of the plate; A channel groove formed at a boundary between the insertion hole and the extension groove and having a stepped surface formed on both sides; A guide coupled to the channel groove and pivoting left and right on the channel groove and locking the screw inserted into the insertion hole by being pivoted back and forth due to a pushing force of the tension portion; And a control unit.

According to the cervical fixation device of the present invention having the above-described structure, the guide, which is rotated at a predetermined angle in the screw insertion port, is tightly fixed along the head portion of the screw inserted at various angles, There is an effect that can be made.

Further, since the practitioner does not have to care about the angle of entry of the fixation screw, the cervical spine fixation device can be more easily and easily performed, and the advantage of the present invention is a progressive invention that can shorten the procedure time.

1 is a perspective view of a cervical spine fixation device according to a first embodiment of the present invention,
2 is a plan view of a cervical spine fixation device according to the first embodiment of the present invention,
3 is an exploded perspective view of the cervical spine fixation device of the first embodiment of the present invention,
Figs. 4 and 5 are views showing an operating state of the guide of the cervical spine fixation device of the first embodiment of the present invention, Fig.
FIG. 6 is an operational state of the screw insertion device of the first embodiment of the cervical spine fixation device of the present invention,
7 is a perspective view of the cervical spine fixation device according to the first embodiment of the present invention with the screw inserted.
8 is a perspective view of the cervical spine fixation device of the second embodiment of the present invention,
9 is a plan view of a cervical spine fixation device according to a second embodiment of the present invention,
10 is a bottom view of the cervical spine fixation device of the second embodiment of the present invention,
11 is an exploded perspective view of the cervical spine fixation device of the second embodiment of the present invention,
12 is a sectional view taken along the line AA 'in FIG. 9,
13 is a view showing the operating state of the guide of the cervical spine fixation device of the second embodiment of the present invention,
Fig. 14 is an operational state diagram of the second embodiment of the cervical spine fixation device according to the second embodiment of the present invention at the time of screw insertion.

Hereinafter, the configuration of a cervical spine fixation device having a self-tension portion of the present invention will be described in detail with reference to the drawings.

It is to be noted, however, that the disclosed drawings are provided as examples for allowing a person skilled in the art to sufficiently convey the spirit of the present invention. Accordingly, the present invention is not limited to the following drawings, but may be embodied in other forms.

In addition, unless otherwise defined, the terms used in the description of the present invention have the same meaning as commonly understood by one of ordinary skill in the art to which the present invention belongs. In the following description and the accompanying drawings, A detailed description of known functions and configurations that may be unnecessarily blurred is omitted.

FIG. 1 is a perspective view of a cervical spine fixation device according to a first embodiment of the present invention, FIG. 2 is a plan view of a cervical spine fixation device according to the first embodiment of the present invention, and FIG. 3 is an exploded perspective view of a cervical spine fixation device according to the first embodiment of the present invention.

Referring to the drawings, a cervical spine fixation device 1 of a first embodiment of the present invention includes a plate 10 in the form of a flat plate.

The material of the plate 10 is preferably a rigid metal material such as titanium.

The shape of the plate 10 is rectangular and each corner portion is a curved surface. At least one insertion hole 20 into which the screw 100 for fixing the plate 10 to the cervical vertebrae is inserted into each of the corners of the plate 10 is pierced through the plate 10.

In the first embodiment of the present invention, four insertion holes 20 are formed. However, the number of insertion holes may be two, six, eight or more according to the level of the cervical spine fixation procedure can do.

The inner wall 21 of the insertion hole 20 has a curved surface that matches the shape of the portion of the head 101 of the screw 100 to be described later.

The plate 10 has an enlarged groove 50 formed between the insertion hole 20 and the center of the plate 10 so that the plate 20 is inserted into the boundary between the insertion hole 20 and the enlarged groove 50. Channel grooves 22 are formed on both sides of a stepped surface 23 having a predetermined height from the surface of the substrate 10.

A guide 30 to be described later is inserted into the channel groove 22 and the interpolated guide 30 can be rotated in the lateral direction on the channel groove 22 while following the entering direction of the screw 100.

The guide 30 is a substantially "C" -shaped member. Specifically, a connecting plate 33 having a plate-like upper jaw 31 and a lower jaw 32 extending in the vertical direction and extending in the horizontal direction, And are integrally formed.

The guide 30 is inserted between the bottom surface 31a of the upper jaw 31 and the upper surface 32a of the lower jaw 32 by being inserted into the channel groove 22 formed in the plate 10. [

The upper jaw 31 of the guide 30 in this engaged state protrudes in the direction of the center of the insertion hole 20 through the upper surface of the channel groove 22, The surface 31a is brought into contact with the upper surface of the head 101 portion of the screw 100 entering the insertion hole 20 to lock the screw 100 to prevent the screw 100 from retracting .

4, the guide 30 is inserted into the channel groove 22 in the left and right directions until the upper jaw 41 and the lower jaw 42 are hooked by the step surfaces 23 on both sides of the channel groove 22 It is possible to pivot.

A tension portion 40 pushing the guide 30 toward the center of the plate 10 is formed in the extension groove 50.

2 and 3, the tension unit 40 includes a base 41 extending from one side of the edge of the extension groove 20 to the center of the plate 10, A first bent portion 42 bending at the distal end of the guide 30 toward the guide 30 and a bent portion 42 bent in parallel with the connecting surface 33 of the guide 30 at the distal end of the first bent portion 42. [ And a bending portion 43. The contact surface between the second bent portion 43 and the connecting surface 33 of the guide 30 forms an arm 45. [

At this time, another tension unit 40 may be further formed for another insertion hole 20 from the end of the base 41 of the tension unit 40, and the other tension unit starts to be formed Thereby forming the branching portion 44. [

The arm 45 of the tension portion 40 is urged by the bending shape of the first bent portion 42 and the second bent portion 43 to push the guide 30 in contact with the arm 45 And a self-tension force with a force.

5, the guide 30 is pushed rearward by the tension force of the arm 45 toward the center of the plate 10 or returned to the center of the insertion hole 20 Can be performed.

Hereinafter, the operation of the cervical spine fixation device having the self-tensioning portion according to the first embodiment of the present invention will be described in detail. 6 and 7 are operational states of the cervical spine fixation device of the first embodiment of the present invention.

First, as shown in the left side view of Fig. 6, a screw 100 (Fig. 6) is formed by fixing the plate 10 of the cervical spine fixation apparatus of the first embodiment of the present invention and including the upper head 101 portion and the lower screw body 102 Enters the insertion hole 20 of the plate 10. [

When the guide 30 comes into contact with the portion of the head 101 of the screw 100 that enters downward, the guide 30, which is in the state in which the elastic force is applied by the arm 45 of the tension portion 40, Which is the center of the plate 10, by the side surface 101a of the plate 101, as shown in Fig. This state is an "unlocked" state in which the plate is not yet fixed by the screw 100. [

However, when the screw 100 further enters the insertion hole 20, the head 101 descends along the inclined surface of the upper jaw 31, and the lower jaw 32 At this time, the contact between the head 101 of the screw 100 and the guide 30 is released, and the guide 30 is inserted into the space while being projected forward by the tension force of the arm 45, And is pushed toward the center of the hole (20).

6, the bottom surface 31a of the upper jaw 31 protruding in the direction of the center of the insertion hole 20 through the upper surface of the channel 22, The upper surface of the head 101 of the screw 100 is caught by the bottom surface 31a of the upper jaw 31 while the screw 100 is in contact with the upper surface of the head 101 and the screw 100 is in a " .

In the locked state of the screw 100, the head 101 of the screw 100 is caught by the upper jaw 31 of the guide 30, thereby preventing the screw retraction of the cervical spine fixation device.

FIG. 7 is a partial cross-sectional view of the cervical spine fixation device of the first embodiment of the present invention in the locked state, in which the inner wall 21 of the insertion hole 20 is partially cut away.

As shown in the left side of Fig. 7, the cervical fixation device of the present invention is not limited to the fact that the screw 100 can be locked into the plate 10 in the vertical direction, and further, The deviation of the head 101 portion of the entering screw 100 when the screw 100 enters the plate 10 with a predetermined deviation angle? Not perpendicular to the plate 10, as shown in the right- The guide 30 is rotated in the left or right direction on the upper surface of the associated channel groove 22 along the angle alpha and the head 31 of the screw 100 is screwed to the upper jaw 31 of the rotated guide 30 101) is caught.

Therefore, it is possible not only to solve the problems of the cervical fixation screw which can be caused by the screw inserted at various angles, but also to prevent the screw of the cervical fixation device It is possible to obtain an advantage that the fixing can be performed easily.

Next, the configuration and operation of the cervical spine fixation device of the second embodiment of the present invention will be described.

The cervical spine fixation device 2 of the second embodiment of the present invention is a modification of the configurations of the guide 30 and the tension part 40 in comparison with the first embodiment. Hereinafter, with reference to Figs. 8 to 11, The operation is explained in detail.

Fig. 8 is a perspective view of the cervical spine fixation device of the second embodiment of the present invention, Fig. 9 is a plan view of the cervical spine fixation device of the second embodiment of the present invention, Fig. 10 is a bottom view of the cervical spine fixation device of the second embodiment of the present invention, 9 is an AA 'line sectional view, and Fig. 12 is an exploded perspective view of a cervical spine fixation device according to a second embodiment of the present invention.

8 to 10, the cervical spine fixation device 2 according to the second embodiment of the present invention includes a flat plate 110. The material of the plate 110 is similar to that of the first embodiment Is a rigid metal material such as titanium.

The shape of the plate 110 is a quadrangle, and each corner portion is a curved surface.

At least one insertion hole 120 into which the screw 100 for fixing the plate 110 to the cervical vertebrae is inserted into each corner of the plate 110 is inserted through the plate 110, As in the first embodiment described above, the number of insertion holes can be two, six, eight, or more according to a fixed level of the cervical spine procedure.

The inner wall 121 of the insertion hole 120 has a curved surface that matches the shape of the portion of the head 101 of the screw 100.

The insertion hole 120 and the opening 110 formed in the center of the plate 110 have an expansion groove 150 formed through the plate 110. The insertion hole 120 and the extension groove 150 A channel groove 122 having a stepped surface 123 of a predetermined height from the surface of the plate 110 is formed at both sides of the channel.

A guide 130 for locking the screw 100 inserted into the insertion hole 120 is inserted into the channel groove 122.

11, the guide 130 is integrally formed by a connection surface 133 in which a lower jaw 132 and an upper jaw 131 in the form of a flat plate extending in the horizontal direction extend in the vertical direction, Combined.

The two guides 130 as described above are used as a set so that a tension is applied to the inside of the connecting surface 133 'between the connecting surface 133 of the one guide 130 and the other guide 130' A tension plate 140 having a flat or bar shape is attached.

12, the tension portion 140 is inserted into the insertion groove 112 formed at the lower end of the channel groove 122, and in this state, the upper jaw 131 of each guide 130.130 ' The guide 130 and 130 'are inserted into the channel groove 122 by inserting the channel groove 122 between the bottom surface 131a and the upper surface 132a of the lower jaw 132. [

The upper jaw 131 of the guide 130 in this coupled state protrudes in the direction of the center of the insertion hole 120 through the upper surface of the channel groove 122 and protrudes from the bottom of the protruding upper jaw 131 The surface 131a comes into contact with the upper surface of the head 101 portion of the screw 100 that enters the insertion hole 120 and locks the screw 100 to prevent the screw 100 from retracting .

As shown in FIG. 12, the guide 130 coupled in this way is moved in the left-right direction until the upper jaw 131 and the lower jaw 132 are hooked on the step surfaces 123 on both sides of the channel groove 122 It is possible to pivot.

The tension member 140 attached to the guide 130 has a self-tension with a pushing force toward the center of the plate 110 in the guide 130.

13, the guide 130 is pushed toward the center of the plate 110 by the tension force of the tension unit 140, and the guide 130 is pushed toward the center of the plate 110 by the tension force of the tension unit 140, In the direction of the center.

Reference numeral 134 denotes a hole 134 formed in the upper jaw 131 of the guide 130.

The cervical spine fixation device 2 having the self-tensioning portion according to the second embodiment of the present invention configured as described above performs the same operation as the cervical spine fixation device 1 of the first embodiment of the present invention, The operation of the second embodiment will be described with reference to the operational state diagram at the time of screw insertion in the second embodiment of the present invention shown in Fig.

14, the screw 100 having the function of fixing the plate 110 according to the second embodiment of the present invention enters the insertion hole 120, and the screw 100 is inserted into the insertion hole 120 as described above, And a lower screw body 102. The screw body 102 has a head 101 and a lower screw body 102, respectively.

The side of the head 101 on which the guide 130 in the state in which the elastic force is applied by the tension portion 140 enters the guide 101 while the guide 101 is in contact with the portion of the head 101 of the screw 100, Which is the center of the plate 110, by the spring 101a. This state is an "unlocked" state in which the plate is not yet fixed by the screw 100. [

However, when the screw 100 further enters the insertion hole 120, the head 101 descends along the inclined surface of the upper jaw 131 of the guide 130, and then the upper jaw 131 and the lower jaw 132, respectively.

At this time, as the contact between the head 101 of the screw 100 and the guide 130 is released from the space between the upper jaw 131 and the lower jaw 132, the tension of the tension unit 140 The guide 130 is returned to the center of the insertion hole 120 by the tension force.

14, the bottom surface 131a of the upper jaw 131 protruding toward the center of the insertion hole 120 passing through the upper surface of the channel 122 is inserted into the bottom surface 131a of the screw 100 The upper surface of the head 101 of the screw 100 is caught by the bottom surface 131a of the upper jaw 131 in this state and the screw 100 is locked ) "State.

In the locked state of the screw 100, the head 101 of the screw 100 is caught by the upper jaw 131 of the guide 130, thereby preventing the screw retraction of the cervical spine fixation device.

On the other hand, in the cervical spine fixation device 2 of the second embodiment of the present invention which operates as described above, even if the screw 100 enters the plate with a predetermined deviation angle? The guide 130 can be rotated in the left or right direction on the channel groove 122 to which the guide 130 is coupled along the deviation angle alpha of the portion of the head 101 of the cervical vertebra, The screwing of the cervical spine fixation device can be easily performed without paying attention to the angle of entry of the fixation screw during the procedure of the patient 1.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims. And should be construed as falling within the scope of protection of the present invention.

Description of the Related Art [0002]
One; The cervical spine fixation device of the first embodiment of the present invention
10; plate
20; Screw insertion hole
21; An inner wall 22; Channel home
23; However,
30; guide
31; An upper jaw 31a; Upper jaw floor
32; A lower jaw 32a; Lower jaw floor
33; Connecting face
40; Tension portion
41; Base 42; The first bent portion
43; A second bent portion 44; The branching portion
45; cancer
50; Extended Home
100; screw
101; Head 101a; Head side
102; Body
2; The cervical spine fixation device of the second embodiment of the present invention
110; plate
111; Through hole 112; Insert groove
120; Screw insertion hole
121; Inner wall 122; Channel home
123; However,
130; guide
131; An upper jaw 131a; Upper jaw floor
132; A lower jaw 132a; Lower jaw floor
133; Connecting surface 134; hole
140; Tension portion
150; Extended Home

Claims (4)

A cervical spine fixation device in which a screw is inserted into at least one insertion hole formed in a plate-like plate,
An enlarged groove formed through the plate between the center of the insertion hole and the plate;
A channel groove formed at a boundary between the insertion hole and the extension groove and having a stepped surface formed on both sides;
A guide coupled to the channel groove and pivoting left and right on the channel groove and locking the screw inserted into the insertion hole;
A tension unit that applies a force to push the guide in the direction of the center of the plate so that the guide rotates back and forth in the channel groove; And,
The tension unit
A base 41 extending from one side of the edge of the extension groove to the center of the plate,
A first bent portion 42 bent from the distal end of the base 41 toward the guide,
A second bending portion 43 bent at a distal end of the first bending portion 42 in parallel with a connecting surface 33 of the guide,
And an arm (45) which forms a contact surface with the connecting surface (33) of the guide and the second bent portion (43). delete The apparatus according to claim 1,
The upper jaw 31 and the lower jaw 32 extending in the horizontal direction are combined with the connecting surface 33 extending in the vertical direction to form a single body,
The channel groove portion of the plate is coupled between the bottom surface 31a of the upper jaw 31 and the upper surface 32a of the lower jaw 32,
Wherein the bottom surface (31a) of the upper jaw (31) is in contact with the upper surface of the head (101) portion of the screw (100) to lock the screw (100).
The apparatus according to claim 1,
A guide 130 integrally joined by a connecting surface 133 extending in the vertical direction and an upper jaw 131 and a lower jaw 132 extending in a horizontal direction,
A tensioning part 140 having elasticity is attached to the inside of the connecting surface 133 'between the connecting surface 133 of the one side guide 130 and the other side guide 130' ,
The tension portion 140 is inserted into the insertion groove 112 formed at the lower end of the channel groove and is engaged with the bottom surface 131a of the upper jaw 131 and the upper surface 132a of the lower jaw 132 of each guide 130.130 ' , The guides 130 and 130 'are coupled to the channel grooves by being inserted into the channel grooves,
Wherein the bottom surface (131a) of the upper jaw (131) of the coupled guide (130) is in contact with the upper surface of the head (101) portion of the screw (100) to lock the screw (100).

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