KR20070108102A - Apparatus for inserting a cage - Google Patents

Abstract

An apparatus for inserting a cage is provided to prevent the cage from being released due to physical impulse by making a perpendicular relation between a rotation axis of a rotation iron member and a rotation axis of a rotation bar. An apparatus for inserting a cage includes a handle unit(110), a supporting member(130), an outer pipe, a rotation bar(160), and a rotation iron member(120). The supporting unit is coupled with the handle unit and the outer pipe is coupled with the supporting member at one end. The rotation bar is inserted into the supporting member and the inside of the outer pipe. A screwing unit is formed at the end of the rotation bar. The rotation bar is coupled with a second bevel gear. A first bevel gear is installed on the rotation iron and is meshed with the second bevel gear inside the supporting member. The screwing unit is coupled with an internal screw of the cage at the other end of the outer pipe.

Description

Apparatus for inserting a cage}

The present invention relates to a device for inserting a prosthesis inserted between the vertebrae for fusion of the spine, and more particularly, an inserting device that is more firmly fixed to the prosthetic member and more easily coupled to the prosthetic member when the prosthetic member is removed from the human body. It is about.

The intervertebral fusion procedure for the treatment of vertebral fractures and other spinal diseases is generally performed by inserting a prosthesis into the intervertebral body.

The prosthetic member is commonly used under the name 'cage', and is inserted into the adjacent vertebral bone after removal of the damaged vertebrae into one, and is manufactured in various shapes and specifications such as a circular ring, a cuboid, and the like.

In addition, the prosthetic member is generally used by inserting the bone fragments extracted from the patient or the bone fragments of others or artificial bone fragments therein. In addition, it has a hollow structure to further enhance the union effect between the vertebrae.

The prosthesis was inserted into the spine in various ways. For example, the most conventional prosthetic member inserting device has a structure in which a rotating rod having a threaded portion is coupled to a prosthetic member having a female thread. The rotating rod is rotated in the opposite direction to the operator and the rotating rotor installed on the other side of the screw unit to combine or separate the prosthetic material. The rotator is a structure that is subjected to physical shock as it is

However, the implant insertion device is subjected to a strong shock from the upper side by the medical hammer (medical hammer) during the procedure.

As described above, the implantation device of the prosthetic member has a problem that, when such an impact is applied, the prosthetic member rotates due to the impact and is detached or loosened from the insertion apparatus.

In particular, in the case of inserting the female screw-shaped prosthesis member, there is a problem that is more easily solved because the physical impact is directly applied to the rotating rotor coupled to the rotating rod. In addition, there is a problem that the screw thread formed on the rotating rod is damaged due to such an impact.

Accordingly, the present invention provides a prosthesis inserting device according to the first embodiment of the present invention disposed to intersect the rotating rod with the rotating rod to minimize the impact of physical impact and to facilitate the fixation of the operator. The present invention according to the first embodiment is characterized in that the rotating body for fixing the prosthetic material and the head portion that is directly subjected to physical shock is separated.

In addition, the prosthesis member inserting apparatus according to the second embodiment of the present invention is a structure in which the protrusions are lowered and the lower surface of the protrusions press the inner locking jaw of the prosthetic member, characterized in that the two protrusions disposed facing each other slide. .

Prosthesis inserting device according to an embodiment of the present invention

First, since the axis of rotation of the rotator and the axis of rotation of the rotator are perpendicular to each other it can reduce the loosening due to physical impact.

Second, by using a bevel gear, it is possible to rotate faster or fix more firmly with a small force, depending on the gear ratio.

Third, since the outer cylinder is configured separately, it is possible to replace as needed, it is easy to replace when broken.

Fourth, an elastic member is inserted between the first outer cylinder and the second outer cylinder to prevent separation of the prosthetic member.

Fifth, the fixing jaw is formed at the end of the outer cylinder to prevent unnecessary rotation of the prosthetic material.

Sixth, the head portion is provided separately to replace the head portion of various shapes and standards.

Seventh, since the lower end of the protrusion is fixed by pressing the locking jaw of the prosthetic member directly to prevent the departure of the prosthetic member.

Seventh, the sliding surface is formed on the inner bottom surface of the protrusion has an effect that can easily slide.

The present invention for achieving the effect as described above, in the device for inserting the implant member 300, the female screw 310 is formed, the handle portion 110; and the support member coupled to the handle portion (110) 130 and; outer cylinders 140 and 150 coupled to the support member 130 at one end; and inserted into the outer cylinder and the support member 130, and a threaded portion 161 is formed at an end thereof and a second bevel gear 162. Rotating rod 160 is coupled; And a rotator 120 provided with a first bevel gear 121 engaged with the second bevel gear 162 in the support member 130, wherein the screw part 161 is formed of an outer cylinder. It is characterized in that the other end is coupled to the female screw 310 of the prosthetic member 300.

The outer cylinder is composed of the first outer cylinder 140 and the second outer cylinder 150, the elastic member 170 is provided between the first outer cylinder 140 and the second outer cylinder 150. The fixing jaw 152 is formed at the end of the second outer cylinder 150 to prevent the rotation of the prosthetic member 300. In addition, the cutting surface 151 is formed on the outer circumferential surface of the second outer cylinder 150 is configured to be used even where the insertion of the implant 300 is not easy.

In addition, the head portion 111 is screwed to the handle portion 110 is further made.

The present invention, in the device for inserting the prosthesis member 400, the locking jaw 430 is formed on the inner side, the handle portion 210; and having an extended jaw 241 formed with an inclined surface 242 at one end; The outer side (230, 240) coupled to the handle 210 and the other side; and the two projections 251 disposed to face each other at a predetermined distance to the expansion jaw 241 at one end so as to protrude from the outer cylinder Is formed and the other side is formed with a screw thread 253, the rotating rod 250 is inserted into the outer cylinder and the handle portion 210; And a handle 220 having a female thread 221 engaged with the thread 253 of the rotating rod 250. The protrusion 251 is formed along the inclined surface 242 of the expansion jaw 241. Provided is a prosthesis insert device characterized in that the slide.

A sliding surface 252 is formed on the inner surface of the protrusion 251 so that the protrusion 251 can slide more easily on the expansion jaw 241.

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

Referring to FIG. 1, the insertion apparatus 100 according to the first embodiment of the present invention preferably has a “T” shape. The handle portion 110 is coupled to the head portion 111, the rotating shaft 120 is protruded on the outer peripheral surface of the support member 130. The support member 130 is coupled with the first outer cylinder 140, and the first outer cylinder 140 is coupled with the second outer cylinder 150. Since the cutting surface 151 is formed on the outer circumferential surface of the second outer cylinder 150, the operator can easily determine the insertion direction during the procedure. The fixing jaw 152 protrudes from the end of the second outer cylinder 150. The fixing jaw 152 is inserted into the insertion groove 320 formed in the prosthetic member 300 to prevent the prosthetic member 300 from rotating when the rotating rod 160 is rotated.

2 is a cross-sectional view showing a state in which the insertion device 100 according to the first embodiment is cut along the longitudinal direction. Referring to FIGS. 3A, 3B, and 3C, which are partially enlarged views of FIGS. 2 and 2, the rotating rod 160 is inserted into the support member 130, the first outer cylinder 140, and the second outer cylinder 150. The end surface of the rotating rod 160 having the threaded portion 161 is preferably slightly protruded from the front surface of the fixing jaw 152 of the second outer cylinder 150 or positioned on the same surface. The second outer cylinder 150 is coupled to the left and right movement by a predetermined distance from the first outer cylinder 140, the elastic member 170 is inserted therebetween. The elastic member 170 may be implemented as a plate spring or a ring spring, and when the prosthetic member 300 is coupled, presses the second outer cylinder 150 to the coupling surface of the prosthetic member 300 to form a screw part 161. To prevent loosening.

The first outer cylinder 140 and the support member 130 is preferably fixed by screwing so as to be more firmly fixed. Rotating iron 120 is installed on the outer circumferential surface of the support member 130. The rotating bracket 120 is coupled to interlock with the first bevel gear 121 installed in the support member 130.

Meanwhile, the second bevel gear 162 is coupled to the rotating rod 160. The second bevel gear 162 is installed to engage with the first bevel gear 121 in the support member 130. Since the first bevel gear 121 and the second bevel gear 162 mesh with each other and one surface of the second bevel gear 162 is disposed to be in close contact with one surface of the first outer cylinder 140, the rotating rod 160 is supported. The movement of the top, bottom, left and right inside the member 130 is fixed, and only the rotation is possible in accordance with the rotation of the rotator 120.

In addition, the head 111 is preferably spaced apart from the rotating rod 160 to be screwed to the support member 130 so as not to transmit a direct impact to the rotating rod 160.

4, in the insertion apparatus 100 according to the first embodiment of the present invention, the front of the fixing jaw 152 is in close contact with or close to the bottom surface 321 of the insertion groove 320 of the prosthetic member 300. When the screw 161 is inserted into the female screw 310 by the rotation of the rotary rod 160, the second outer cylinder 150 is retracted.

This is shown in more detail in FIG. 5. When the operator comes into close contact with or close to the fixing jaw 152 to the insertion groove 320, and then rotates the rotator 120 to engage the screw portion 161 to the female screw 310, the female screw along the screw portion 161 ( 310 starts to be coupled to press the front surface of the fixing groove 152 of the bottom surface 321 of the insertion groove 320 of the prosthetic material 300. Accordingly, the second outer cylinder 150 is retracted, and in the state in which the screw portion 161 is completely locked (the second outer cylinder is retracted as much as possible or the thread portion can no longer rotate), as described above, the elastic member 170 Since the front surface of the fixing jaw 152 pressurizes the bottom surface 321 of the insertion groove 320 of the prosthetic member 300, the screw portion 161 and the female screw 310 are more firmly engaged.

Meanwhile, as described above, the prosthetic member 300 is manufactured in various shapes and standards and has a structure in which hollows are formed on upper, lower, left, and right surfaces to promote fusion between the intervertebral bodies. The prosthesis 300 shown in FIGS. 4 and 5 is merely shown to simplify the structure possible to help the understanding of the present invention.

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

Referring to FIG. 6, the insertion device 200 according to the second exemplary embodiment of the present invention has a “T” shape and the outer cylinders 230 and 240 are coupled to the handle 210. The outer cylinder is divided into the upper outer cylinder 230 and the lower outer cylinder 240, one side of the upper outer cylinder 230 is coupled to the handle portion 210, the other side of the lower outer cylinder 240 is coupled. The upper outer cylinder 230 and the lower outer cylinder 240 penetrates the inside, and the end of the lower outer cylinder 240 has a "∩" -shaped expansion jaw 241 protrudes to cross the center. An inclined surface 242 inclined at a predetermined angle is formed at an upper end of the expansion jaw 241.

8 and 9, the lower end cylinder 240 and the rotary rod 250 inserted into the upper outer cylinder 230 have protrusions 251 formed at one end thereof, and the other end thereof is positioned in the handle 210. . As shown in FIGS. 6 and 7, the protrusion 251 is divided into two parts with respect to the expansion jaw 241 and is disposed to face each other, and the part divided below the protrusion 251 is inside the lower outer cylinder 240. In one piece. A thread 243 is formed at the other end of the rotating rod 250 positioned in the handle 210. The handle 210 is provided with a handle 220 coupled to the rotating rod 250 and a head 211 to be subjected to physical shock. The handle 220 is installed in the handle portion 210, as shown in Figure 6 and 7 to rotate. A female thread 221 is formed at the handle 220, and the female thread 221 is coupled to the thread 253 of the rotating rod 250. The head portion 211 is preferably spaced apart from the rotating rod 250 by a predetermined distance to prevent damage of the thread 253, pitch distance of the thread 253 and the female thread 221 and The shape can be implemented in various ways. As shown in FIG. 7, the handle 220 according to the second embodiment of the present invention may be configured to be rotatable at about 90 degrees, but more or less configurations may be possible.

9 and 10, in accordance with the rotation of the handle 220, the female thread 221 of the handle 220 and the thread 253 of the rotary rod 250 move relative to each other by a predetermined pitch, and thus the thread The rotating rod 250 to which the 253 is connected is moved back and forth. That is, when the handle 220 is in the position as shown in FIG. 7, the protrusion 251 is placed in the position shown in the left figure of FIG. 10, and when the handle 220 is in the same position as in FIG. It is placed in the same position. The outer diameter formed by the two separated protrusions 251 is d in the left view of FIG. 10 and D in the right view. When the handle 220 is rotated 90 degrees, the protrusion 251 is retracted to the inside of the outer cylinder by a quarter of the pitch distance of the thread 253. As the revolving rod 250 retreats, each protrusion 251 is spaced apart by the expansion jaw 241. The d should be smaller than the inner diameter of the insertion hole 420 of the prosthesis 400 and D should be larger than the inner diameter of the insertion hole 420. In addition, the sliding surface 252 is preferably formed at an inner position in contact with the inclined surface 242 so that the protrusion 251 may be more easily opened. The inclination angles of the slide surface 252 and the inclined surface 242 are manufactured according to the pitch distance of the thread 253.

11A and 11B, the prosthesis member 400 inserting device 400 according to the second embodiment of the present invention has a prosthesis member having an inner diameter larger than that of the insertion hole 420. That is, the engaging jaw is combined with the formed prosthetic member (the prosthetic member shown in FIGS. 11A and 11B is also shown to simplify the structure possible to help the understanding of the present invention).

Referring to the operating state of the insertion device 200 according to a second embodiment of the present invention. 12A and 12B, in the handle 220 position as shown in FIG. 7, each of the protrusions 251 enters into the locking jaw 430 through the insertion hole 420. Then, when the handle 220 is turned as shown in FIG. 6, the protrusion 251 slides the expansion jaw 241 and retreats downward, and at the same time, the distance between each of the protrusions 251 is opened and the locking jaw 430 is formed. Will be in close contact with

On the other hand, the expansion jaw 241 is inserted into the insertion groove 410 in the prosthetic member 400 to prevent the prosthetic member from rotating or moving like the fixing jaw 152 of the first embodiment.

In addition, the upper outer cylinder 230 and the lower outer cylinder 240 may be formed integrally because there is a difference in diameter in order to be inserted into the affected part more easily during the procedure, but need not be separated.

On the other hand, the embodiments of the present invention disclosed in the specification and drawings are merely presented specific examples to aid understanding, and are not intended to limit the scope of the present invention. In addition to the embodiments disclosed herein, it is apparent to those skilled in the art that other modifications based on the technical idea of the present invention may be implemented.

1 is a perspective view of an insertion apparatus according to a first embodiment of the present invention;

2 is a longitudinal cross-sectional view of the insertion apparatus according to the first embodiment of the present invention;

3A is an enlarged view of a portion A in FIG. 2, FIG.

3B is an enlarged view of a portion B in FIG. 2, FIG.

3C is an enlarged view of a portion C in FIG. 2, FIG.

4 is a perspective view showing a state before the insertion apparatus is coupled to the prosthetic material according to the first embodiment of the present invention;

5 is a cross-sectional view sequentially showing a state in which the insertion device according to the first embodiment of the present invention is coupled to the prosthetic material,

6 is a perspective view showing a state when the insertion apparatus is locked according to a second embodiment of the present invention;

7 is a perspective view showing a state when the insertion apparatus is in an unlocked state according to a second embodiment of the present invention;

8 is a longitudinal sectional view of an insertion apparatus according to a second embodiment of the present invention;

9 is an enlarged view of a portion F in FIG. 8, FIG.

10 is a cross-sectional view showing the operation of the projection according to the second embodiment of the present invention;

11A is a perspective view illustrating a state in which a prosthetic member coupled to an insertion apparatus according to a second embodiment of the present invention is partially cut away;

11B is a cross-sectional view of FIG. 11A;

12A is a cross-sectional view showing a state before the insertion apparatus is locked to the prosthetic member,

12B is a cross-sectional view showing a state after the insertion apparatus is locked to the prosthetic member.

Description of the main parts of the drawing

100: inserting device 110: handle portion

120: the rotating iron 130: support member

140: first outer cylinder 150: second outer cylinder

160: rotating rod 161: screw portion

241: expansion jaw 251: protrusion

Claims (8)

In the device for inserting a female thread formed prosthesis, Handle; Support member coupled to the handle portion; And An outer cylinder coupled to the support member at one end; and A rotating rod inserted into the support member and the outer cylinder and having a screw portion formed at an end thereof, and having a second bevel gear coupled thereto; And A rotating bezel provided with a first bevel gear meshing with the second bevel gear in the support member; And the screw portion is coupled to the female screw of the prosthesis at the other end of the outer cylinder. The prosthesis inserting device of claim 1, wherein the outer cylinder includes a first outer cylinder and a second outer cylinder. The prosthesis inserting device according to claim 2, wherein an elastic member is provided between the first outer cylinder and the second outer cylinder. The prosthesis inserting device according to claim 3, wherein a fixing jaw is formed at an end of the second outer cylinder. The prosthesis inserting device according to any one of claims 1 to 4, further comprising a head screwed to the handle part. The prosthesis inserting device according to any one of claims 2 to 4, wherein a cutting surface is formed in the second outer cylinder. In the device for inserting the prosthesis member with the locking step formed on the inside, Handle; An outer cylinder having an extended jaw formed with an inclined surface at one end thereof and the other side thereof coupled with the handle part; and Two protrusions disposed to face each other at a predetermined distance to the expansion jaw is formed at one end to protrude from the outer cylinder, the other side is formed with a screw thread is inserted into the outer cylinder and the handle portion; And And a handle formed with a female thread that meshes with a screw thread of the rotating rod. The prosthesis inserting device, characterized in that the sliding along the inclined surface of the expansion jaw. The prosthesis inserting device according to claim 7, wherein a sliding surface is formed on an inner lower end surface of the protrusion.

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