KR101331428B1 - Apparatus for fixing a cervical spine following an inserting angle of screw - Google Patents

Abstract

The present invention relates to an apparatus for fixing cervical spine used in a cervical spine anterior fixation surgery in orthopedics or neurosurgery and, more specifically, to the apparatus for fixing cervical spine which follows insertion angles of screws and comprises: ring shaped channels in which one side is opened and screws are inserted into one or more of accommodating grooves formed on a flat plate, and which are attached to inner walls of the accommodating grooves; guides which are combined to the channels and can be rotated in horizontal direction of expanded grooves formed towards a center part of a plate on the inner walls of the accommodating grooves; and pushing tools which are installed in the expanded grooves and push the guides towards the center of the accommodating grooves.

Description

Apparatus for fixing a cervical spine following an inserting angle of screw}

The present invention relates to a cervical fixation device used when performing anterior cervical fixation surgery in orthopedic or neurosurgery, and more particularly, a screw is inserted into at least one accommodating groove formed in a plate-shaped plate. A ring-shaped channel attached to an inner wall of the groove and open at one side thereof; A guide coupled to the channel, the guide being rotatable in the horizontal direction in the space portion of the expansion groove formed in the direction of the center of the plate on the inner wall of the receiving groove; A sealing means installed in the expansion groove to push the guide toward the center of the receiving groove; It relates to a cervical vertebrae fixing device that follows the entry angle of the screw, characterized in that configured to include.

In general, orthopedic or neurosurgery for cervical disc disease, cervical disc, cervical myelopathy, cervical spine fractures, etc. A cervical fixation device is used that consists of a plate and a screw that secures the plate to the cervical spine.

The procedure of the cervical fixation device is to incise the affected part from the front of the neck of the patient and expose the cervical spine to perform a procedure such as a cage for cervical spine on the affected part of the cervical spine, and then place the plate at the upper and lower part of the affected part. It is made by fixing the plate by screws.

Then, by the fixing force of the screw of the cervical vertebrae fixing device and the supporting force of the plate, the procedure such as a cage (cage), etc., which is performed on the cervical vertebrae is fixed so as not to move.

However, after the procedure, the screw may be released from the plate of the cervical vertebral fixer due to the activity of the patient, and the phenomenon may be caused to retreat from the plate. In order to prevent such a phenomenon, techniques such as the cervical plate system of the Republic of Korea Patent Publication No. 10-2009-86387 (notification technology 1) and the cervical spine fixing device (Notification Technology 2) of the Republic of Korea Patent Publication No. 10-2005-11167 It is.

The known technique 1 is a configuration having a rotating element that is installed to be inserted into the hole of the screw on the plate of the cervical vertebral plate system, the known technique 2 is a head of the fixing screw between the fixing screw insertion hole formed on the plate It is a structure that installs the fastening head fixing member.

However, the screw is inserted into the plate at various angles according to the shape of the cervical spine or the condition of the cervical fixation device, and the known techniques are difficult to insert the rotating element into the screw in the inserted state at various angles ( Known technology 1), a problem that the fixing member is hardly caught on the head of the fixing screw (notice 2) may occur, such a problem not only makes the procedure more difficult and complicated, but also leads to an increase in the procedure time.

The present invention was devised to solve the conventional problems as described above, cervical fixation device that can prevent the retreat phenomenon of the screw by firmly fixing the fixing screw inserted into the plate at various angles during the operation of the cervical spine fixing device There is a technical problem of the present invention to provide a configuration.

The cervical vertebrae fixing device according to the present invention for achieving the above technical problem is characterized in that it is provided with a guide which can be rotated to the left and right within a certain angle range within the insertion hole of the fixing screw according to the entry angle of the fixing screw.

The cervical vertebrae fixing device of the present invention having the configuration as described above is tightly fixed along the head portion of the screw inserted into the guide at various angles that are rotated at a predetermined angle inside the screw insertion hole, thereby firmly fixing the screw regardless of the entry angle of the screw. It can be effected.

In addition, since the operator does not need to correlate the angle of entry of the fixing screw has obtained the advantage that the procedure of the cervical fixation device can be made more simply and easily, due to this advantage is an advanced invention that can lead to a shortening of the procedure time.

1 is a perspective view of the cervical spine fixing device of the present invention,
Figure 2 is an exploded perspective view of the cervical spine fixing device of the present invention,
3 is a plan view of the cervical spine fixing device of the present invention,
Figure 4 is an enlarged perspective view of the channel and the guide of the cervical spine fixing device of the present invention,
5 and 6 is a view showing the operating state of the guide of the cervical spine fixing device of the present invention,
7 and 8 is an operating state when the screw insertion of the present invention cervical vertebrae fixing device,
9 is a perspective view of the screw inserted state of the present invention cervical vertebrae fixing device,
Figure 10 is a perspective view showing a leaf spring as a sealing means of the cervical spine fixing device of the present invention.

Hereinafter, with reference to the drawings will be described in detail the configuration of the cervical spine fixing device that follows the entry angle of the screw of the present invention.

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 there is another definition in the terms used in the present specification, it has the meaning that is commonly understood by those of ordinary skill in the art, the gist of the present invention in the following description and the accompanying drawings. Detailed descriptions of well-known functions and configurations that may be unnecessarily blurred are omitted.

1 is a perspective view of the present invention, Figure 1 is a perspective view of the cervical spine fixing device, Figure 2 is an exploded perspective view of the cervical spine fixing device of the present invention, Figure 3 is a plan view of the cervical fixing device of the present invention.

Referring to the drawings, the cervical vertebrae fixing device 1 of the present invention is a plate-shaped plate 10 made of a rigid metal material such as titanium or a polymer material such as polyether ether ketone (PEEK). It has a body.

The plate 10 is rectangular in shape, and each corner portion is formed as a curved surface, and each of the receiving grooves 20 into which the screw 100 for fixing the plate 10 to the cervical spine is inserted into each corner thereof. do.

Although four accommodation grooves 20 are shown in the figure, the accommodation grooves may be adjusted to six, eight or more depending on the level of fixation of the cervical fixation procedure.

An expansion groove 21 having a predetermined space portion extending in the direction of the recess 11 in the center of the plate 10 is formed on the inner wall surface of the accommodation groove 20. The guide groove 40 to be described later is inserted into the expansion groove 21 to rotate left and right in the guide portion 40 in the space portion of the expansion groove 21.

On the inner wall surface of the receiving groove 20 is a circular ring-shaped channel 30, one side of which is open, is attached, the guide 30 is rotatably installed in the left and right directions.

As will be described later, the guide 40 pivoting on the channel 30 performs a function of more firmly fixing the head 101 portion of the screw 100 by rotating in the left and right direction following the entrance direction of the screw 100. Done.

In addition, the expansion groove 21 is formed with a pushing means for pushing the guide 40 toward the center of the receiving groove 20, this sealing member may be used a variety of known components such as leaf spring, ring spring However, in the embodiment of the present invention, as the sealing means, as shown in the enlarged view of Figure 3, further forming an inner groove 22 in the direction of the groove 11 of the plate 10 on the inner wall surface of the receiving groove 20, The inner groove 22 is provided with a rod-shaped sealer 50 and a spring 51 for imparting elastic force to the sealer 50.

The channel 30 and the guide 40 will be described in more detail with reference to FIG. 4 as follows.

The channel 30 has a partially cut circular ring shape, in which both the first channel 31 and the second channel 32 are integrally formed at both ends of the intermediate channel 33 located on the left and right sides of the first channel 31. 31 and the second channel 32 are formed stepped with the intermediate channel 33 so that the upper stepped surface 34 between the first channel 31 and the second channel 32 with the intermediate channel 33, respectively. ) And a lower stepped surface 35 are formed.

In addition, the inner wall 36 of the channel 30 forms a curved surface that is engaged with the formation of the head 101 portion of the screw 100 to be described later, and the first channel 31 and the second channel 32 A flange 37 protruding outward is formed on the outer circumference.

In addition, the guide 40 is rotated in the horizontal direction on the upper surface 33a of the intermediate channel 33, and the upper surface of the flange 37 is a mounting surface on which the lower jaw 42 of the guide 40 is mounted ( 38).

In addition, the guide 40 is a member having a substantially "C" shape, specifically, the connecting portion 43 in which the upper jaw 41 and the lower jaw 42 of the flat plate shape extending in the horizontal direction extend in the vertical direction. It is combined with and formed in one piece.

The outer side of the connecting portion 43 is formed with a sliding groove 44 in which the pusher 50 is installed in the inner groove 22 of the receiving groove 20 in the horizontal direction of the body.

The guide 40 as described above is coupled to each other by combining the middle channel 33 portion of the channel 30 between the bottom surface 41a of the upper jaw 41 and the upper surface 42a of the lower jaw 42. The upper jaw 41 and the lower jaw 42 of the guide 40 in the coupled state pass through the upper surface 33a of the intermediate channel 33 and protrude further in the inner direction of the channel 30, and protrude. The bottom surface 41a of the upper jaw 41 contacts the upper surface of the head 101 portion of the screw 100 to be described later, and locks the screw 100 so that the screw 100 does not retract. Will be given.

In addition, the upper jaw 41 forms an inclined surface 41b on the front side, and the inclined surface 41b preferably forms a concave arch shape that can be fitted to the cross section of the head 101 of the screw 100. .

As illustrated in FIG. 5, the guide 40 coupled to the upper jaw 41 and the lower jaw 42 have an upper stepped surface 34 and a lower stepped surface 35 of the channel 30. It is possible to rotate left and right until it is caught.

In addition, as shown in FIG. 6, the guide 40 is a state in which the seal 50, which is in contact with the slide groove 44, exerts an elastic force in the opening direction of the inner groove 22 by the spring 51. Therefore, the guide 40 may be pushed backward in the direction of the recess 11 of the plate 10 or performed to return to the center direction of the receiving groove 20.

Hereinafter, the operation of the cervical vertebrae fixing device that follows the entrance angle of the screw of the present invention configured as described above will be described in detail. 7 and 8 is an operation state diagram of the cervical spine fixing device of the present invention.

First, as shown in the left side of FIG. 7, the screw 10 comprising the body 102 having the upper head 101 and the lower thread 103 fixed to the plate 10 of the cervical vertebrae fixing device of the present invention ( 100 enters the receiving groove 20 of the plate 10.

Then, as shown in the center of FIG. 7, the guide 40 in the state in which the elastic force is imparted by the sealer 50 is contacted with the head 101 of the screw 100 entering downward, and the guide 40 contacts the head ( 101 is pushed backward by the groove 11 in the plate 10 direction. This state is an "unlock" state in which the plate is not yet fixed by the screw 100.

However, when the screw 100 further enters the receiving groove 20, the head 101 descends along the inclined surface 41b of the upper jaw 41 and then the upper jaw 41 and the lower jaw 42. Concave into the space between the, the contact (50) in the state pushed back while the contact between the head 101 and the guide 40 is released to the front by the elasticity of the spring 51 guide 40 It is pushed in the direction of the center of the receiving groove (20).

Then, as shown in the right side of FIG. 7, the bottom surface 41a of the upper jaw 41 is further protruded in the inner direction of the channel 30 through the upper surface 33a of the intermediate channel 33. While contacting the upper surface of the head 101 portion of the screw 100, the head 101 portion of the screw 100 is inserted between the upper jaw 41 and the lower jaw 42, the upper surface of the head 101 The screw 100 is placed in the "locking" state by being caught by the bottom surface 41a of the upper jaw 41. In the locked state of the screw 100, the head 101 is caught by the upper jaw 41 of the guide 40, thereby preventing the screw retraction of the cervical vertebrae fixing device.

8 is a partial cross-sectional view of the present invention the cervical spine fixing device in the locked state, as shown in the left side of Figure 8, the cervical spine fixing device of the present invention, the screw 100 is perpendicular to the plate 10 direction Of course it can be locked by entering.

Furthermore, the cervical spine fixing device of the present invention, as shown in the right figure of Figure 8, when the screw 100 enters with a predetermined deviation angle (α), not perpendicular to the plate 10, the screw entering The guide 40 is rotated in the left or right direction on the intermediate channel 33 of the combined channel 30 along the deviation angle α of the head 101 portion of the 100, and the guide 40 is rotated. The head 101 of the screw 100 is caught by the upper jaw 41 of the).

Therefore, not only the above-mentioned problems of the cervical fixation screw procedure which may be caused by the screw inserted at various angles in the related art can be solved at once, but the screw of the cervical fixation device is required without the operator paying attention to the entrance angle of the fixing screw. The advantage is that the fixation can be performed easily.

On the other hand, Figure 9 is a state diagram using the screw of the present invention the cervical spine fixing device, the screw 100 is inserted into each of the receiving grooves 20 on the plate 10 of the present invention during the operation of the actual cervical spine fixing device As shown in the figure, the plate 10 is inserted into and fixed in accordance with a predetermined deviation angle, not in a vertical direction. In this case, the cervical vertebrae fixing device is different from each other by the left and right rotation of the guide 40 as described above. Screws 100 that enter with the lock can be efficiently locked.

On the other hand, Figure 10 is a perspective view of a state employing the sealing means of the cervical spine fixing device of the present invention as a leaf spring 60, as shown, to receive the guide 40 to push in the center direction of the receiving groove 20 After mounting the leaf spring 60 on the inner wall surface of the groove 20, one end of the leaf spring 60 in contact with the slide groove 44 of the guide 40, the leaf spring 60 itself Simultaneously performs the functions of the sealer 50 and the spring 51 described above.

In the above description, the configuration of the cervical vertebrae fixing device that follows the entrance angle of the screw of the present invention has been described in detail with reference to the accompanying drawings, but the present invention can be variously modified, changed and replaced by those skilled in the art. And substitutions should be interpreted as falling within the protection scope of the present invention.

Description of the Related Art [0002]
One; Cervical spine fixation device of the present invention
10; Plate 11; Groove
20; Housing
21; Expansion groove 22; Internal groove
30; channel
31; First channel 32; 2nd channel
33; Intermediate channel 33a; Top of middle channel
34; Upper stepped surface 35; Lower stepped surface
36; Inner wall 37; Frenzy
38; Through
40; guide
41; Upper jaw 41a; Upper jaw bottom
42; Lower jaw 42a; Lower jaw top
43; Connection 44; Sliding groove
50; Wheatgrass 51; spring
60; Leaf spring
100; screw
101; Head 102; Body
103; Thread

Claims (5)

In the cervical vertebrae fixing device in which the screw 100 is inserted into at least one receiving groove 20 formed in the plate-shaped plate 10,
A ring-shaped channel 30 attached to an inner wall of the receiving groove 20 and having one side open;
A guide (40) coupled to the channel (30) and rotatable in the left and right directions in the space of the expansion groove (21) formed in the direction of the center of the plate (10) on the inner wall surface of the receiving groove (20);
A sealing means installed in the expansion groove 21 to push the guide 40 toward the center of the accommodation groove 20;
Cervical vertebrae device, characterized in that comprising a.
The method of claim 1, wherein the channel 30,
The first channel 31 and the second channel 32 are formed integrally at both ends of the intermediate channel 33,
The first channel 31 and the second channel 32 are formed to be stepped with the intermediate channel 33 to form an upper stepped surface 34 and a lower stepped surface 35,
The guide 40 is rotated on the upper surface 33a of the intermediate channel 33 until the guide 40 is caught by the upper step surface 34 and the lower step surface 35 of the channel 30. Cervical vertebrae device, characterized in that the rotation in the left and right directions.
The method of claim 2, wherein the guide 40,
The upper jaw 41 and the lower jaw 42 having a flat plate shape extending in the horizontal direction are combined with the connecting portion 43 extending in the vertical direction, and are integrally formed.
The intermediate channel 33 portion of the channel 30 is coupled between the bottom surface 41a of the upper jaw 41 and the upper surface 42a of the lower jaw 42, thereby being mutually coupled to the channel 30.
The bottom surface 41a of the upper jaw 41 of the combined guide 40 and the upper surface 42a of the lower jaw 42 are in contact with the upper and lower surfaces of the head 101 portion of the screw 100, respectively. Cervical vertebrae device, characterized in that for locking.
4. The cervical spine fixing device according to claim 3, wherein the sealing means is a leaf spring (60).
The method of claim 3, wherein the sealing means,
On the inner wall surface of the receiving groove 20 to form an inner groove 22 in the direction of the groove 11 of the plate 10,
A rod-shaped sealer 50 and a spring 51 for providing elastic force to the sealer 50 are installed in the inner groove 22,
Cervical vertebrae fixing device, characterized in that the sliding portion (44) formed in the concave seal 50 is installed in the inner groove (22) of the receiving groove (20) outside the connecting portion (43) of the guide (40).

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