KR20000012195A - Apparatus for fixing rachis - Google Patents

Abstract

PURPOSE: A spine fixing device is provided to properly fix an unstable backbone due to the fracture and diseases, to adjust its width easily and to simplify the structure. CONSTITUTION: The device is composed of:a first and a second rods(5) to connect the backbone screw members with each other and to support; a pressing member(33) to press the first and second rods toward the backbone screw members; a first connecting member(110) having its one side to be combined to the first rod and having an expansion part(116) on its other side; and a second connecting member(120) having its one side to be combined to the second rod and having an upper and a lower expansion parts on its other side.; Herein, the combination of the connecting members with the rods is easy, and the structure is simplified. Therefore, the manufacture and the use are convenient.

Description

Intravertebral Fixation Device {APPARATUS FOR FIXING RACHIS}

The present invention relates to an intravertebral fixation device, and more particularly, to an intravertebral fixation device capable of properly fixing an unstable spine due to fracture and disease of the spine, and having a simple width control and a simple structure.

In general, when the spine is broken or a disease occurs, the spine is fixed. As a device for fixing the spine in an appropriate relationship, a method of integrally fixing a screw using a screw is widely used.

The method of fixing integrally using the screw is a screw is coupled to the spine at regular intervals, the screw is coupled while being pressed by a rod and a pressing plate arranged in the longitudinal direction of the spine, the rod and the rod is connected It is connected to each other integrally by.

The screw comprises a screw portion coupled to the spine, a head portion to which the rod is coupled, and a neck portion formed between the head portion and the screw portion.

However, in the related art, the screw coupled to the spine is fixedly coupled to the rod integrally, and the rod and the rod are integrally connected by the connecting portion, and the connection part is formed separately from the connecting portion on the pressing plate for pressing the rod in the screw direction. There was a problem that can not be adjusted in the vertical, vertical, left and right directions to fix the spine in an appropriate relationship.

In addition, since the connecting portion is formed of a length determined according to the distance between the rod and the rod, there is a problem in that the length of the connecting portion cannot be adjusted even if the distance between the rods is changed.

Therefore, the present invention has been proposed to solve the above problems, and an object of the present invention is to provide an intravertebral fixation device having an easy width control and simple structure while properly fixing an unstable spine due to fracture and disease.

In order to achieve the above object, the present invention provides a pedicle screw member that is fixedly coupled to the spine at regular intervals, and is detachably coupled to the pedicle screw member and supports the pedicle screw members while supporting each other. And a second rod and a pressing member detachably coupled to the pedicle screw member, each pressing member for pressing the first rod and the second rod toward the pedicle screw member, and one side of the rod is connected to the first rod. A first connection member having an extension portion formed on the other side thereof, one side of which is coupled to the second rod, and an upper extension portion and a lower extension portion formed on the other side thereof, and between the upper extension portion and the lower extension portion of the first connection member; Provided is an intravertebral fixation device including a second connection member connected to each other so that the extension part is inserted and the connection width of each other is adjustable.

In addition, the first and second connection members are provided with a fastening screw, the opening portion is formed in the longitudinal direction of the extension portion of the first connection member and has a predetermined size in the upper and lower extension portions of the second connection member. Through holes are formed, the tightening screw is coupled to each other and the extension of the first and second connecting member through the opening of the first connecting member and the through hole of the second connecting member, It can be configured to be movable within the opening.

In addition, the tightening screw may be screwed with the through hole of the lower extension without screwing the through hole of the upper extension of the second connecting member.

In addition, the first and the second connection member includes a fixing screw for fixing the rod by pressing the portion coupled to the rod, the fixing screw may be inclined by a predetermined angle toward the rod.

In addition, the end of the fixing screw is in contact with the rod is formed in a curved surface, it is preferable to incline about 5 ° toward the rod.

1 is a front view showing a state in which the intravertebral fixation device according to the present invention is applied.

Figure 2 is a perspective view of the intravertebral fixation device of Figure 1;

Figure 3 is a front view showing the connection of the intravertebral fixation device according to the present invention.

Figure 4 is a front view showing a state in which the connection width of the connecting portion of the present invention is expanded.

5 is a plan view showing a first connecting member of the present invention.

Figure 6 is a plan view showing a second connecting member of the present invention.

7 is a front view showing a second connecting member of the present invention.

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

1: spine 5: rod

33: pressing member 100: connecting portion

110: first connecting member 112: fixing screw portion

116: extension 118: opening

120: second connecting member 122: fixing screw portion

126: upper extension 128: lower extension

130, 132: Tightening screw

Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment of the present invention.

1 is a front view showing a state in which the intravertebral fixation device is applied according to the present invention and FIG. 2 is a perspective view showing the intravertebral fixation device. In general, when the spine 1 becomes unstable due to fracture or disease, a fixing device is used to fix the spine 1 in a stable state. Referring to the drawings, the pedicle screw member 3 is coupled to a predetermined portion of each spine 1 at predetermined intervals. The pedicle screw member 3 is continuously formed in two rows along the vertebrae 1. The pedicle screw member 3 fixed to each vertebra 1 is detachably connected by a pair of rods 5, the rods 5 connecting the vertebrae 1 through the pedicle screw members 3. Support in the longitudinal direction. The pressing member 33 is detachably installed on the pedicle screw member 3 to serve to press the rod 5 toward the pedicle screw member 3. The rods 5 installed side by side along the vertebrae 1 are also connected to each other so that the connecting width is adjustable by the connecting portion 100.

3 to 7 show the connection part 100 of the intravertebral fixation device according to the invention. Referring to the drawings, the connecting portion 100 is composed of approximately the first connecting member 110 and the second connecting member 120. One side of the first connection member 110 is formed to partially wrap the rod 5 while being bent inward, and the other side extends toward the other rod. At this time, one side of the first connection member 110 is preferably wrapped enough to not separate the rod 5, it is preferable to wrap about 180 degrees.

In addition, the first connection member 110 has a fixing screw portion 112 and a fixing screw portion 112 for fixing the rod 5 by pressing the rod 5 slightly inside the center line of the rod 5 is inserted through the threaded connection. The sphere 150 is provided. At this time, the fixing screw 112 is preferably slightly inclined toward the rod 5, most preferably about 5 degrees. Fixing screw portion 112 is also preferably formed so that the end portion 114 in contact with the rod 5 is curved to expand the contact area with the rod 5 to be more stable coupling.

Referring to FIG. 3, the first connection member 110 has the widest thickness on the rod 5, and is formed to gradually become thin while surrounding the rod 5. At this time, the end portion of the first connecting member 110 wrapped around the rod 5 is structurally preferable because it is easy to round the finish when combined with the rod (5). The first connecting member 110 also has a thickness on the rod 5 that extends to the engaging portion with the fixing screw portion 112, and the height of the lower portion rises as the width of the first connecting member 110 passes through the engaging portion with the fixing screw portion 112. do. Afterwards, the first connection member 110 has an extension portion 116 extending toward the other rod in a reduced width.

The extension 116 of the first connecting member 110 has an opening 118 formed in the longitudinal direction, as shown in FIG. 5, which shows a plan view of the first connecting member 110. The opening 118 of the first connection member 110 is preferably about 1/3 of the extension portion 116, the end of the opening 118 is preferably formed in a semicircle.

The second connecting member 120 is formed in a direction substantially opposite to the first connecting member 110, the portion connected to the rod 5 is the same as the first connecting member 110, the upper portion of the first connecting member It is formed somewhat higher than (110). The second connecting member 120 is also provided with a fixing screw portion 122 similar to that of the first connecting member 110, the fixing screw portion 122 of the second connecting member 120 of the second connecting member 120 The length is formed longer to correspond to the width. The fixing screw portion 122 of the second connecting member 120 may also have a round end portion 124 contacting with the rod, similarly to the fixing screw portion 112 of the first connecting member 110.

The second connecting member 120 also has an extension towards the rod 5 coupled with the first connecting member 110. At this time, the extension portion of the second connection member 120 is composed of an upper extension 126 and a lower extension 128, the upper extension 126 and the lower extension 128 is spaced vertically apart from each other The extension part 116 of the first connection member 110 is inserted into the spaced gap. At this time, it is preferable that the extension part 116 of the first connection member 110 and the upper and lower extension parts 126 and 128 of the second connection member 120 have the same thickness.

The upper and lower extension portions 126 and 128 of the second connection member 120 have predetermined through holes 140 and 142 formed at the same position, and the adjustment screws 130 and 132 are provided through the through holes 140 and 142. Is combined. At this time, the thread is not formed in the through hole 140 of the upper extension 126, the thread is formed in the through hole 142 of the lower extension 128, the adjustment screws 130, 132 is the upper extension The screw 126 is screwed only with the lower extension 128 without screwing. Therefore, when tightening the tightening screws (130, 132), the upper extension 126 is in place, but the lower extension 128 is raised by the tightening screws (130, 132) of the first connecting member 110 The extension part 116 is tightly coupled to the upper extension part 128. Here, the through hole 140 of the upper extension 116 is preferably slightly larger in diameter than the through hole 142 of the lower extension 118.

Here, the tightening screws 130 and 132 are coupled to the through holes 140 and 142 of the second connecting member 120 through the opening 118 of the first connecting member 110. Therefore, since the opening 118 of the first connecting member 110 is formed long, when the extension parts 116, 126, 128 are coupled to each other using the tightening screws 130 and 132, the user may firstly make a first connection. The connecting width can be adjusted by moving the tightening screws 130 and 132 through the opening 118 of the connecting member 110. In this connection width adjustment, a user screwes the tightening screws 130 and 132 to the lower extension 118 of the second connecting member 120 through the opening 118 of the first connecting member 110. This can be done easily by adjusting the connection width and then fully mating.

Here, one or more adjustment screws may be used, but in the present invention, two are used in consideration of both structural stability and convenience of manufacture.

In addition, the first and second connection members 110 and 120 have a wide width at the extension portions 116, 126, and 128, and the width of the first and second connection members 110 and 120 gradually decreases at the portion where the first and second connection members 110 and 120 are coupled to the rod 5. It is preferable to form so that it may become slightly wider while wrapping. This is to increase the area of contact between the coupling portion between the extension portions 116, 126, and 128 and the coupling portion with the rod 5 to make it structurally strong and stable, and to reduce the width to a part where the stress is relatively low. Because it can.

The intravertebral fixation device according to the present invention configured as described above has an advantage in that a separate connection member is installed on each rod and the connection width can be easily adjusted using the connection member.

In addition, the present invention has the advantage that it is structurally very stable by tightly coupling the rod by using a fixed screw portion and by tightening the connection members to each other using a tightening screw.

In addition, by combining with the rod by using a fixing screw, there is an advantage that the coupling member and the rod is easily coupled, and the structure is simplified and convenient to manufacture and use.

Claims (4)

A pedicle screw member fixedly coupled to the spine at regular intervals, First and second rods detachably coupled to the pedicle screw member and supporting the pedicle screw members while being connected to each other; A pressing member detachably coupled to the pedicle screw member and configured to press the first and second rods toward the pedicle screw member, respectively; One side is coupled to the first rod, the other side and the first connection member is formed with an extension, One side is coupled to the second rod, the other side is formed with an upper extension and a lower extension, the extension of the first connecting member is connected between the upper extension and the lower extension is connected, the connection width is An intravertebral fixation device comprising an adjustable second connecting member. The method of claim 1, The first and second connection members are provided with a tightening screw, the opening of which is formed in the extension portion of the first connection member in the longitudinal direction and the through hole having a predetermined size in the upper and lower extension portions of the second connection member. Is formed, and the tightening screw couples the extension portions of the first and second connection members to each other through the opening of the first connection member and the through hole of the second connection member, and within the opening of the first connection member. Intra-vertebral fixer, characterized in that movable. The method of claim 2, And the tightening screw is screwed with the through hole of the lower extension without screwing with the through hole of the upper extension of the second connecting member. The method of claim 1, The first and second connection members include a fixing screw portion for pressing and fixing the rod to a portion engaged with the rod, wherein the fixing screw portion is inclined toward the rod by an angle. Device.