KR200264056Y1 - Fixation device for spine - Google Patents

Abstract

The present invention relates to a spinal fixation device, the configuration is provided with a plurality of, having a length corresponding to the spacing of each bone constituting the spine, the annular connecting member and the space formed therein, the plurality of connecting members A washer member coupled to one end of the connection member positioned at both ends thereof, and a screw member for fixing the washer member and the connection member and having a screw thread inserted into each bone constituting the spine. One end and the other end of the adjacent connecting member is overlapped and the screw member is inserted into each bone forming the spine through the overlapped inner space, and one end of the connecting member and the washer member placed at both ends of the plurality of connecting members. By inserting the screw member into each bone constituting the spine to keep the distance between each bone constituting the spine constant It is characterized in that it prevents the instability by preventing movement, which can shorten the spinal surgery time by the easy operation of the instrument than the conventional surgery, and provides the spinal fixation device that can be easily performed on the patient's spine. And there is an advantage that can be performed in a more easy and effective way for patients in need of fixation and stabilization.

Description

Fixation device for spine

The present invention relates to a medical device, and more particularly, to a spinal fixation device used in spinal fixation surgery to maintain and stabilize the distance between the bones constituting the spine.

In general, patients with spinal cord injuries or spinal disorders experience pain due to narrowing of the intervals between the bones of the spine or compression of nerves due to instability of each bone node and the like, and also a significant inconvenience in behavior. The procedure for this patient is to insert a spinal locking device that maintains and stabilizes the bones that make up the vertebrae in the vertebral bone of the patient and maintains the space between the vertebral bones to release and stabilize the compressed nerves. The method has been done.

Such a conventional spinal column fixing device is shown in FIGS. 1 and 2. 1 and 2, the conventional spinal column fixing device 100 includes a plurality of insertion screws 200 and a frame part 300, and each of the insertion screws 200 includes a screw body 210 and a nut. It consists of 230. Here, each insertion screw 200 is inserted between the bones forming the spine by a separate surgical instrument (not shown).

The screw body 210 is part of which is inserted into the vertebral bone of the human body, one end of which is formed with a thread, the other end of the 'U' shaped receiving groove 212 in the axial direction (vertical direction) Is formed long, the thread is formed so that the outer periphery can be screwed with the nut 230 to be described later. The screw body 210 has a certain strength and is made of metal such as titanium, which is harmless even when inserted into a bone constituting the human body. In addition, the nut 230, the frame portion 300 and the like is also made of a metal such as titanium harmless to the human body.

The nut 230 is screwed with the screw body 210 by engaging with a screw thread provided in the upper portion of the screw body 210, that is, the receiving groove 212 is provided. Therefore, a space is formed between the receiving groove 212 and the lower end of the nut 230, the frame portion 300 passes through the space.

The skeleton portion 300 is made of a constant length is formed long along the spine of the patient. After the frame portion 300 is seated in the receiving groove 212 of the screw body 210 is to screw the nut 230 and the screw body 210.

Inserting the screw portion 200 of the conventional spinal fixing device 100 having the above-described structure between the bones constituting the spine, and inserting the skeleton portion 300 into each receiving groove 212 of the screw portions 200 Afterwards, the respective nuts 230 are coupled to the respective screw parts 200. In this way, each screw portion 200 to be connected through the skeleton portion 300, by maintaining a constant interval of each bone (7) constituting the spine, each bone (7) constituting the spine does not compress the nerves will be. That is, by maintaining each screw portion 200 coupled to the frame portion 300 at a constant interval, the distance between each bone 7 constituting the spine was kept constant.

However, the conventional spinal column fixing device 100 needs a bending process to bend the frame portion 300. This is because the human spine is not a straight line as a whole, but has a certain curvature. The direction of the curve includes both the up, down, left and right directions when viewed from the front of the patient's back. Therefore, the screw portion 200 is also difficult to get stuck in the vertebrae in a parallel straight line. In addition, since the frame portion 300 must be bent to be inserted into the receiving groove 212 of the upper part of the screw body 210, the frame portion 300 made of a strong metal rod continues in various directions along a predetermined length. There was a problem in processing and procedure that had to be bent. That is, since the degree of bending varies from patient to patient and insertion of the screw part 200 into a row is difficult, the processing of the skeleton portion 300 is required, and thus the skeleton portion 300 is processed separately during surgery. (Not shown) was used to bend to fit the spine state of the patient, but in order to operate the conventional spinal fixation device 100 to the patient, even the bending of the skeleton portion 300 is a considerable time and difficulty There were many surgical problems. That is, if the degree of bending the spine of the patient and the angle of the screw insertion does not match, it was difficult to bend the frame 300 to fit the receiving groove 212 of the screw body 210 correctly with the conventional spinal fixing device 100 The delay of the procedure was inevitable. In addition, the skeleton portion 300 is an integral bar type having a long length, so the long skeleton portion 300 must be bent at a certain length not only in the left and right direction but also in the vertical direction to meet the spine state of the patient. Many difficulties were followed to make it possible.

In addition, if the procedure time is delayed, causing a lot of problems in the recovery of the patient, and when the receiving groove 212 of the skeleton portion 300 and the screw body 210 is not matched to the stabilization of the spine, which is the original purpose of the procedure. There was a problem that it could not contribute.

The present invention is designed to solve the problems described above, the purpose of which is to minimize the need to perform a separate bending process during the operation of the spine to reduce the operation time, the state of the spine of the patient or the heat of the screw portion To achieve the purpose of the procedure by providing a spinal fixation device that can easily match the (row) mismatch.

1 is a side view of a conventional spinal column fixing device

Figure 2 is a plan view showing a state in which the conventional spinal fixation device is performed

Figure 3a to 3f is a perspective view of each part of the spinal fixing device according to an embodiment of the present invention

4 is a schematic plan view of a state in which the spinal column fixing apparatus shown in FIGS. 3A to 3D is performed;

FIG. 5 is a schematic side view of a state in which the spinal column fixing apparatus shown in FIGS. 3A to 3D is operated.

FIG. 6 is a schematic side view of the spinal column fixing device in which the eccentric washer shown in FIGS. 3E and 3F is installed.

7a and 7b is a perspective view of the connecting member and the washer member forming a spinal column fixing device according to another embodiment of the present invention

<Explanation of symbols for the main parts of the drawings>

10. Connecting member 11. Protrusion

20. Washer member 21. Washer protrusion

30. Screw member 40. Eccentric washer

Spinal fixing device according to the present invention for achieving the above object is provided with a plurality of, having a length corresponding to the interval of each bone constituting the spine, the annular connection member is formed in the space, and the plurality A washer member coupled to one end of the connection member positioned at both ends of the two connection members, and a screw member having a thread formed therein to fix the washer member and the connection member and inserted into each bone constituting the spine; One end of the connecting member overlaps one end of the other adjacent connecting member and penetrates the overlapping inner space to insert the screw member into each bone constituting the spine, and one end of the connecting member placed at both ends of the plurality of connecting members. The interval between the bones forming the spine is fixed by inserting the screw member into each bone forming the spine through the washer member. It is characterized in that the stabilization by maintaining and fixing.

Hereinafter, the spinal fixing device according to the preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

Figures 3a, 3b, 3c, 3d, 3e and 3f is a perspective view of each part constituting the spinal fixing device according to an embodiment of the present invention, Figure 4 is a spinal fixing device shown in Figures 3a to 3f Figure 5 is a schematic plan view of the state, and Fig. 5 shows a schematic side view of the state of the spinal fixing device shown in Figures 3a to 3f, respectively.

As shown in the figure, the spinal column fixing device 1 according to an embodiment of the present invention includes a connecting member 10, washer member 20, and a screw member 30.

The connecting member 10 is provided in plural and is manufactured in various lengths according to the intervals of the bones 7 constituting the spine of the patient. As shown in FIG. 3A, the connecting member 10 has a long elliptical shape having a predetermined thickness, and a through hole 15 is provided therein. That is, the connecting member 10 has a long donut shape as a whole. The inner circumferential wall of the connecting member 10, that is, the side wall of the through hole 15, is provided with a plurality of grooves 13 slightly recessed in the outer circumferential direction thereof. Since the screw member 30 which will be described later is located in the groove 13, the flow of the screw member 30 is suppressed and the eccentric washer 40 which will be described later is easily inserted. In addition, a plurality of protrusions 11 protrude sharply from the surface of one surface of the connecting member 10. The protrusions 11 may be provided on an entire surface of the connection member 10 or may be provided only at both ends of the connection member 10. In addition, the protrusions 11 may be manufactured in various sizes, but the height of the protrusions 11 may be about 0.1 mm to 2 mm.

The washer member 20 may have the same thickness as the connection member 10 or may be thicker or thinner. Moreover, the space is formed in the center part. That is, it has a normal nut shape. However, the washer member 20 is different from the ordinary washer is that a plurality of pointed washer projections 21, such as the connection member 10 is provided on the entire surface of the washer member 20. In addition, the washer member 20 is also provided with a groove 23 inclined toward the center on the daily surface like the connection member 10. The groove 23 also serves as the groove 13 provided in the connecting member 10.

The screw member 30 has a conventional screw shape, and includes a screw portion 31, a head portion 33, a support plate 35, and a nut 37. The screw portion 31 is provided at one end of the screw member 30, the screw thread 311 is formed to be easily inserted into the bone (7) and to prevent shaking in the inserted state. The head portion 33 is provided at the opposite end of the screw portion 31, the screw thread 331 is formed to be coupled to the nut 37 to be described later. The support plate 35 is provided between the screw part 31 and the head part 33, that is, at the center of the screw member 30, and is connected to the support plate 35 as a part that protrudes at right angles to the longitudinal direction of the screw member 30. It is a part where the member 10 and the washer member 20 are placed. The nut 37 is screwed to the screw thread 331 formed on the head 33, the upper surface of the screw groove wall 371 of the screw member 30 to be separated from the screw member 30 to apply a certain force The upper part is slightly protruded toward the center. Part of the protrusion of the screw groove wall 371 is made by a punching operation. That is, a part of the screw bone (coupled with the thread of the head) formed in the nut 37 due to the punching operation slightly protrudes toward the center of the nut, so that after the nut 37 is screwed to the screw member 30, To apply a certain force is to be separated from the screw member (30). On the other hand, the blade portion 313 is further provided at the end of the screw member 30. The blade portion 313 is a groove which is dug in a straight line toward the center at the end of the screw member 30, the sharp edge surface of the groove serves as a blade. As the blade portion 313 is formed as described above, the screw member 30 is more easily inserted into the bone 7 constituting the spine of the patient.

Spinal fixation device (1) of the present invention having the structure as described above is fixed as follows to stabilize the interval between each bone constituting the spine to be performed as follows.

4 and 5 will be described a process in which the spinal column fixing device 1 according to an embodiment of the present invention is performed.

First, as shown in FIGS. 4 and 5, the threaded portion 31 of each screw member 30 is inserted into each vertebral bone 7 requiring the patient's procedure. And one connecting member 10 is inserted into the head 33 of the screw member 30 embedded in the spine of the patient. At this time, the protrusion 11 faces upward, that is, the flat surface on which the protrusion is not formed is directed toward the bone 7. Subsequently, the position of the washer member 20 is determined so that the washer protrusions 21 of the washer member 20 are engaged with the protrusions 11 of the connection member 10. Since the protrusions 11 and the washer protrusions 21 may be manufactured to have a sufficiently small height, the protrusions 11 and the washer protrusions 21 may be engaged with each other while moving the position of the washer member 20 little by little. 10 and the washer member 20 can be combined with each other. The head 33 of the screw member 30 embedded in the spine of the patient passes through the through hole of the washer member 20 and the inner space of the connecting member 10. On the other hand, since the protrusion 11 and the washer protrusion 21 are engaged with each other, the washer member 20 has a contact surface in which the surface direction of the connection member 10, that is, the surfaces of the washer member 20 and the connection member 10 contact each other. It can prevent movement in. In this state, the nut 37 is screwed to the head 33 of the screw member 30 so as to firmly engage the screw member 30, the connecting member 10, and the washer member 20. At this time, a slight punching is applied to the upper surface of the nut 37 so that the nut 37 can be rotated only by applying a force of a predetermined strength or more, thereby preventing the nut 37 from being detached from the screw member 30 by itself. do. In addition, since the screw member 30 is configured to be caught by the groove 13 of the connecting member 10, the flow of the screw member 30 is suppressed.

Next, the other connecting member 10 is connected to the other end of the connecting member 10 coupled with the washer member 20. At this time, similar to the shape in which the washer member 20 and the connection member 10 are coupled, the projection 11 of the connection member 10 is adjacent to the projection 11 of the other connection member 10 connected to each other. To engage the other connecting members 10. That is, one end of the connection member 10 and one end of the other adjacent connection member 10 overlap each other. Then, the head 33 of the screw member 30 passes through the overlapped inner space. Subsequently, as described above, the nut 37 is screwed to the screw member 30 to firmly couple the screw member 30, the connecting member 10, and the other connecting member 10.

The connecting members 10 are continuously connected in the above-described manner. When the bones 7 forming the spine of the patient connect the connecting member 10 in the direction of 휜, as shown in FIG. 4, the connecting member 10 is aligned with the bending direction of the bones 7 of the patient. What is necessary is just to rotate (10) a little clockwise or counterclockwise.

In addition, as described above, the washer protrusion 21 and the protrusion 11 are engaged with each other at the last connection member 10 to connect the washer member 20 to the last connection member 10, and the nut What is necessary is just to fix it firmly to the screw member 30 through 37.

Meanwhile, according to the state of the spine of the patient, as shown in FIG. 5, only the connecting member 10 corresponding to the portion is bent to fit the patient's state in the portion requiring bending in the vertical direction of FIG. 5. You can do it. Therefore, unlike the conventional spinal fixation device because it does not use a long frame, by bending only the corresponding connection member 10, the operation time can be much shorter than the conventional and the bending process can also be facilitated. .

As described above, when treating a patient who is injured or has a disease in the spine, the connecting members 10 may be connected to each other so as to easily and easily match the bending direction of the bones of the patient's spine. It is not necessary to perform the bending processing, etc., or the procedure as it is, or if there is bending up and down as shown in FIG. At this time, the bending process is different from the conventional spinal fixing device 100, the bending member is performed only for the connection member 10 that needs to bend out of the plurality of connection members 10, and the connection member 10 does not need to bend. Since it is not necessary to perform the processing, it is possible to bend much simpler and faster than the conventional spinal fixing device 100. Thus, the patient can be freed from the burden of long-term surgery and also helps to recover quickly.

In addition, when the washer member 20 and the connecting member 10, and the connecting member 10 and the adjacent connecting member 10 are connected to each other, the protrusion 11 and the washer protrusion 21, or the protrusion 11 and Since the projections 11 are connected in a state where they are engaged with each other, the washer member 20 and the connection member 10, and the connection member 10 and the connection member 10 are respectively prevented from relative movement, that is, slipping against each other. Can be combined in a state.

In addition, it is provided with a connecting member 10 having a variety of lengths, to continuously connect the connecting member 10 corresponding to the length between the bone 7 and the bone 7 constituting the spine of the patient, the connecting member ( 10 are fixed to the bones 7 forming the vertebrae by the screw member 30, thereby maintaining a constant distance between the bones 7 and the bones 7 forming the vertebrae. In addition, the spacing between the narrowed bone 7 and the bone 7 can be widened again by using the connecting member 10 which is slightly longer than the spacing between the narrowed bones 7.

And, the spinal fixation device 1 according to the present embodiment is easily matched to the degree of bending of the bones forming the spine of the patient as described above, the washer member 20 and the connecting member 10, or the connecting member 10 And the connecting members 10 are fixed to the bone 7 by the screw member 30 in a state where the respective sliding members 10 are prevented from slipping with respect to each other, thereby preventing slipping or deformation of the spinal column fixing device 1 according to the movement of the patient. It can be.

On the other hand, in the present embodiment, the projection 11 is formed only on one surface of the connection member 10, but is not limited to this, of course, projections may be formed on both sides of the connection member 10.

Meanwhile, as illustrated in FIGS. 3E and 3F, the eccentric washer 40 may be further provided. The eccentric washer 40 has a washer hole 41 is formed to pass through the shaft of the screw member (30). The thickest part of the eccentric washer 40 is biased toward one of the centers in the longitudinal direction of the eccentric washer 40. In the case of using such an eccentric washer 40, it is preferable that a groove 23 slightly recessed toward the opposite surface is formed along the washer hole circumference of the washer member 20. Since the groove 23 is formed in this way, the thickest portion of the eccentric washer 40 can be easily accommodated. In addition, it is preferable that the inclined groove 13 is also formed in the connecting member 10.

6 shows a state in which the vertebral fixation device according to the present invention is used by using the eccentric washer 40 as described above. As shown in FIG. 6, even if some bending occurs depending on the state of the spine of the patient, the curved surface of the eccentric washer 40 is inserted into the through hole 15 formed in the connecting member 10. , The connecting member 10 is able to maintain a flat state to some extent. That is, when the spine state of the patient is slightly bent, it is possible to simply fit the patient's state by using the eccentric washer 40 without having to bend the connecting member 10 accordingly. The connecting member 10 is to maintain a flat state.

On the other hand, although not described in the present embodiment, as shown in Figure 7a and 7b, even if the projection 211 of the connecting member 210 is formed in a radiation shape can be obtained the same effect as the embodiment described above. In this case, as shown in FIG. 7B, the washer protrusion 221 of the washer member 220 also needs to be formed in a radiation shape.

As described above, according to the spinal fixation device according to the present invention, the operation time is shortened by minimizing the separate processing during the spinal surgery, and at least in spite of the patient's spine state and the thread row mismatch. It can be easily matched to the patient's condition without the processing of or additional processing, and there is no difficulty in the procedure that the conventional spinal fixation device had, so that the procedure can be easily performed while showing a definite effect.

The present invention has been described with reference to one embodiment shown in the accompanying drawings, which is illustrative, and those skilled in the art will understand that various modifications and equivalent embodiments are possible therefrom. . Therefore, the true scope of the present invention should be defined only by the appended claims.

Claims (8)

An annular connecting member having a plurality and having a length corresponding to an interval of each bone constituting the vertebra and having a space formed therein; A washer member coupled to one end of the connection member positioned at both ends of the plurality of connection members; And a screw member fixing the washer member and the connection member and having a screw thread inserted into each bone constituting the spine. One end of the connection member overlaps one end of the connection member and one end of another adjacent connection member and penetrates the overlapping inner space to insert the screw member into each bone constituting the spine, and one end of the connection member placed at both ends of the plurality of connection members. And penetrating the washer member and inserting the screw member into each bone constituting the vertebrae, thereby maintaining and stabilizing the interval between the bones constituting the vertebrae. The method of claim 1, wherein the screw member, A threaded portion formed to be inserted into a bone constituting the spine, A head portion provided at an opposite end of the screw portion and formed with a thread; A support plate provided between the screw portion and the head portion and protruding at right angles to the longitudinal direction of the screw member; Consists of a nut formed with a screw groove to be screwed to the head, And a portion of the wall of the screw groove protrudes in the center direction at the upper end of the nut to prevent the nut from being detached from the head by itself. The method of claim 2, A blade portion is further provided to allow the screw member to be easily inserted into the bone forming the spine of the patient. The blade portion is made of a groove cut in a straight line toward the center of the screw member at the end of the screw member, Spinal fixation device, characterized in that the sharp edge of the groove to cut the bones forming the spine of the patient. The method of claim 2, Eccentric washer is installed between the connecting member and the support plate and between the connecting member and the washer member, Wherein the eccentric washer, the thickest portion is formed in the spine fixing device, characterized in that formed in a position away from the longitudinal center of the eccentric washer. The method of claim 1, One surface of the connection member protrudes a plurality of projections, In the direction in which the projections engage with each other, one end of the connecting member and one end of the other adjacent connecting member is coupled to each other overlapping coupling device. The method of claim 5, One surface of the washer member protrudes a plurality of washers, And the connection member and the washer member are coupled to each other in a direction in which the protrusion of the connection member and the washer protrusion of the washer member are engaged with each other. The method of claim 6, Both the projection of the connecting member and the washer projection of the washer member are provided radially, And the connection member and the washer member are coupled to each other in a direction in which the protrusion of the connection member and the washer protrusion of the washer member are engaged with each other. The method of claim 5, The projection of the connecting member is provided radially, Spinal fixing device, characterized in that the radial projection is engaged with each other, one end of the connection member and one end of the other adjacent connection member is overlapped with each other.