KR100395252B1 - Backbone fused implant - Google Patents

Abstract

The present invention relates to a spinal fusion implant, which is adapted to fit the front and rear spaces between adjacent vertebral bodies in such a manner as to extend the tip portion thereof without rotation of the implant body through the operation of the fastening means and the link means after completion of insertion of the spinal fusion implant. By ensuring proper positioning, it is possible to completely eliminate problems such as bone damage caused by turning 90 ° after insertion of the implant body as before, thus improving the bone growth and safety after the procedure for the patient. It was intended to provide a spinal fusion implant that could help to help the doctor and reduce the burden on the procedure.

Description

Backbone fused implant

The present invention relates to a spinal fusion implant used in a spinal fusion procedure, and more particularly, to a pair of left and right implant bodies in which the distal end portions are expanded, and link means and fastening means for allowing the distal end portions of the implant body. In connection with the spinal fusion procedure, by providing a vertebral fusion implant that is constructed, the spinal fusion implant can be properly positioned to fit the front and rear gaps between adjacent vertebral bodies in a manner that extends the tip portion while being inserted inside the fusion site during the spinal fusion procedure. The present invention relates to a spinal fusion implant that can completely exclude improper bone damage, thereby making the procedure safer and more effective, as well as improving bone growth and safety after the procedure.

In general, the spine of the human body is connected to the disk by a number of the body (Body of spine) to form an S-shaped curve, and one vertebra is composed of a cylindrical vertebrae and a posterior arch at the back of the vertebrae. A spinal canal is formed by a pedicle, an upper and lower articular protrusion extending to the vertebrae, a plaque, and a spinous process, and nerves are located through the spinal canal.

When the disc connecting the vertebrae deforms or ruptures and is displaced from the normal position, or when the joints formed by the lumbar spine are damaged or deformed, the vertebrae deform and displace from the normal position. It is known that pain is caused when external force is applied or compressed to nerves passing through the spinal canal for various reasons.

In some patients, especially patients with broken or damaged discs, spinal fusion implants are used to fuse the spine in place of the disc.

Spinal fusion in the human body associated with the loss of vertebral lordosis is usually performed by Bon bridging through the disk space between adjacent vertebrae occupied by the vertebral disc.

In the spinal fusion procedure, the bridging method forms a bore that penetrates the disk space between adjacent vertebral bodies, and inserts a vertebral fusion implant therein to fuse the adjacent vertebral body with the spinal fusion implant.

6 is a perspective view showing a conventional spinal fusion implant.

The spinal fusion implant 10 is formed in a continuous band form that is formed through the both sides and the hole is constantly formed along the circumference, the spinal fusion implant 10 is inserted or rotated 90 degrees at the front and rear ends, respectively. In order to connect the surgical driver 23 or to insert a bone material or fusion promoting material is formed.

In particular, the front end portion of the spinal fusion implant 10 has a wider right and left than the rear end, it can be inserted and set according to the front and rear intervals between adjacent vertebral body after completion of implantation.

7 and 8 are side views illustrating a state before and after rotation after implantation of a conventional spinal fusion implant.

First, as shown in FIG. 7, after forming a bore in the disk space between adjacent vertebral bodies, the surgical driver 23 is fastened to the hole 29 of the spinal fusion implant 10, and then the spine inwardly of the bore. The fusion implant 10 is inserted lying down.

At this time, since the upper and lower widths of the spinal fusion implant 10 are the same, the insertion operation can be performed without difficulty.

Subsequently, as shown in FIG. 8, the spinal fusion implant 10 is inserted at an appropriate position of the fusion site and then rotated by 90 ° to rotate the spinal fusion implant 10 a wider front gap between adjacent vertebral bodies. It is inserted and settled in a relatively narrow rear gap.

After the insertion of the spinal fusion implant 10 is completed, a bone material or a fusion promoting material is inserted into the spinal fusion implant 10 through the hole 29 to be filled between adjacent vertebrae, The procedure of spinal fusion implant 10 is complete.

Such spinal fusion implant 10 is generally performed in two places, as shown in FIG.

However, such a conventional spinal fusion implant is laid down and inserted by using a spinal fusion implant whose left and right widths of the tip are larger than the rear end in accordance with the front and rear spacing between adjacent vertebral bodies, and then rotated by 90 °. In the process of rotating the implant, there was a problem in that the sharp edges of the spinal fusion implant unnecessarily sharpened the bone and damaged the normal bone. There is a problem.

Accordingly, the present invention has been made in view of the above, and after completion of the insertion of the spinal fusion implant between the adjacent vertebrae in such a way as to extend the tip portion thereof without rotation of the implant body through the operation of the fastening means and the link means. By ensuring proper positioning in the fore and aft intervals, it is possible to completely eliminate problems such as bone damage caused by turning 90 ° after insertion of the implant body as before, thus allowing patients to develop bone growth after the procedure. The aim of the present invention is to provide spinal fusion implants that can help to improve the safety and safety of the procedure, and to reduce the burden on the procedure.

1 is an exploded perspective view showing a spinal fusion implant according to the present invention

2 is a perspective view showing a combined spinal fusion implant according to the present invention

Figure 3 is a cross-sectional view showing the operating state of the spinal fusion implant according to the present invention

Figure 4 is a side cross-sectional view showing a state of operation of the spinal fusion implant according to the present invention

Figure 5 is a cross-sectional view showing the operation of the spinal fusion implant according to the present invention

6 is a perspective view showing a conventional spinal fusion implant

7 is a side view showing an initial state after implantation of a conventional spinal fusion implant

8 is a side view showing a 90 ° rotation after implantation of a conventional spinal fusion implant

9 is a rear view showing the implantation location of a typical spinal fusion implant

<Explanation of symbols for main parts of drawing>

10: spinal fusion implant 10a, 10b: implant body

11 screw hole 12 implant support

13: implant fastener 14: link stay

15 link bar 16: uneven surface

17: jaw 18a, 18b: pin

19: extension 20: long

21a to 21f: pin hole 22: screw portion

23: surgical driver 24: driver mounting surface

25: ball seating groove 26: ball

27: ball receptacle 28: link pin

29: Hall

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

The present invention has a pair of implant bodies (10a, 10b) and a screw hole (11) penetrating through the center of the rear end is combined side by side facing each other through the pin coupling portion and expandable by using the tip portion; An implant support 12 supporting the rear end pin coupling portions of the implant main bodies 10a and 10b, and fastened to a screw hole 11 of the implant support 12 and implanted with the implant main body 10a, An implant fastener 13 which provides a fastening force for distal extension of the 10b, and which is connected to the implant fastener 13 and a pair of implant bodies 10a, 10b, respectively; Receive a fastening force from (13) is characterized in that it comprises a link member for opening the pair of the implant body (10a, 10b) outward.

In particular, the link member is ball-coupled to the front end of the implant fastener 13, the link stay 14 moving forward and backward integrally, and one end is pinned together to the front end of the link stay 14 is arranged at a predetermined angle At the same time, each other end is composed of two link bars 15 which are pin-coupled to the pair of implant bodies 10a and 10b, respectively, to enable linkage with the link stay 13. .

In addition, the outer surface of the implant body (10a, 10b) is characterized in that the concave-convex surface (16).

In addition, the pair of implant bodies (10a, 10b) is characterized in that it takes a certain amount of bending in the same direction in a combined state facing each other.

In addition, the inner end of the implant body (10a), (10b) is characterized in that the supporting step (17) serving as a stopper for limiting the maximum unfolding operation of the link bar (15), respectively.

This will be described in more detail as follows.

Figure 1 is an exploded perspective view showing a spinal fusion implant according to the present invention, Figure 2 is a combined perspective view showing a spinal fusion implant according to the present invention.

As shown in Figures 1 and 2, the spinal fusion implant 10 of the present invention can extend the tip portion after insertion and a pair of implant body (10a), (10b) consisting of two plate combinations, A block-shaped implant support 12 supporting the rear end portions of the implant bodies 10a and 10b with pins 18 for screwing the implant supports 13 and the implant support 13 The implant fastener 13 which provides the fastening force at this time to the link member, and the implant fastener 13 and the implant body 13a and 10b, are combined in a structure that can be interlocked between the implant fastener It consists of a link member that opens the distal end of the implant body (10a, 10b) by using the tightening force from the (13), the implant body (10a), (10b) inside the fusion site during spinal fusion procedure The tip end is extended by the implant fastener 13 and the link member in the state that , Is one to take place properly fit to the fore and aft distance between the vertebral bodies that are adjacent spinal fusion implants.

The implant body (10a), (10b) is composed of a combination of two plate body, the two plates are arranged side by side facing each other at a predetermined distance, each rear end of the pin by the implant support (12) 18a) coupled to each other, the tip portions of which are partially overlapped with the extension pieces 19 bent at 90 degrees.

The implant bodies 10a and 10b are freely rotatable with the pin 18a engaging portion at the rear end as the center point, and the tip portion can be expanded using this.

In addition, the plate body of the implant body (10a), (10b) is formed with a long incision in the longitudinal direction 20, the long hole (20) at this time is a bone material or fusion promoting material to be filled during the procedure It promotes the fusion with bones and helps the bone's internal growth and bone bonding during the fusion process.

Further, pinholes 21a and 21b penetrating the width direction of the plate body are formed at the front and rear ends of the implant bodies 10a and 10b, and the pinholes 21a at the tip end are implant supports. The pin 18a for fastening with the 12 is fastened, and the pin hole 21b at the rear end is fastened with the pin 18b for fastening with the link member.

In addition, the surface of the implant body (10a, 10b) is formed with a wavy concave-convex surface 16 is repeated along the plate longitudinal direction, the concave-convex surface 16 is the implant body (10a), After insertion of 10b, the area in contact with the vertebrae is increased to promote internal growth of the bone.

In addition, the initial engagement state of the implant body (10a, 10b) is kept narrower than the rear end portion when viewed in the extending direction, which facilitates the insertion of the implant body (10a, 10b) To do this.

In particular, the pair of the implant body (10a, 10b) is a certain amount bent in the same direction in the combined state facing each other, which can be seen in Figure 5 to be described later spinal fusion implants As (10) constitutes a balanced arrangement structure coming from the rear to the front of the vertebrae and gathering inwardly, it is possible to maintain a stable support state between the vertebral body and the vertebral body.

In addition, at the tip of the inner surface of the implant body (10a), (10b) is formed a supporting jaw 17, which serves as a kind of stopper, the link bar (15) of the link member by the supporting jaw (17) As it is no longer extended beyond the horizontally stretched state, it is possible to prevent the expanded state of the implant bodies 10a and 10b from being reduced again.

The implant support 12 has a substantially rectangular block shape and is sandwiched between the rear ends of the implant bodies 10a and 10b through both protruding portions having respective pinholes 21c. It can be integrally coupled by the pin (18a).

In addition, a screw hole 11 is formed in the center of the implant support 12, and the implant fastener 13 is fastened therein, thereby enabling the exerting force to be exerted.

The implant fastener 13 serves to push the link member forward by using the fastening force at this time while being fastened to the implant support 12.

The overall outer circumference of the implant fastener 13 is formed with a screw portion 22 for fastening to the screw hole 11 of the implant support 12, the implant fastener 13 is a screw portion 22 While it is fastened to the screw hole 11 by using it can be pushed forward the link member by the progressed distance at this time.

In addition, the rear end circumferential surface of the implant fastener 13 is provided with a driver mounting surface 24 for inserting the surgical driver 23, the driver seat 24 at this time is usually in the form of a hexagon wrench Is preferable.

In addition, the front end portion of the implant fastener 13 extends a predetermined length in the form of a rod, and the ball seating groove 25 is provided at the end thereof so that the link member and the ball can be coupled thereto.

The link member substantially serves to extend the implant body 10a, 10b outward.

To this end, the link member is formed at the front end of the link stay 14 and the link stay 14 moving forward and backward integrally while being coupled to the front end of the implant fastener 13 through the ball 26 of the rear end. One end of each of the ends in the bar receiving portion 27 is pinned together by the link pin 28 and is disposed at a predetermined angle while each other end has a pair of implant bodies 10a, ( Two link bars 15 that are inserted into the long hole 20 in 10b and are coupled by pins 18b, respectively, to allow interlocking between the implant bodies 10a, 10b and the link stay 13. It is composed.

The ball coupling between the implant fastener 13 and the link stay 14 at this time is the flow of the link member when operating the implant fastener 13 or the expansion of the implant body (10a, 10b) Since it can be effectively received, the operation of each member in connection with the treatment of the spinal fusion implant 10 can be smoothly progressed.

Here, reference numerals 21d to 21f denote pinholes for respective pin couplings.

Figure 3 is a cross-sectional view showing the operating state of the spinal fusion implant according to the present invention.

First, the spinal fusion implant is inserted into the spinal fusion site with the narrow tips of the implant bodies 10a and 10b forward.

Initially after insertion of the spinal fusion implant 10, there is no change in the tip of the implant bodies 10a, 10b.

Of course, the implant body (10a, 10b) at this time can be filled with a predetermined amount of bone material or fusion promoting material in advance.

Subsequently, the implant fastener 13 is further fastened into the implant support 12 using the surgical driver 23, and the implant fastener 13 is advanced forward in proportion to the extent of the fastening at this time. To help.

At the initial stage of fastening of the implant fastener 13, both link bars 15 of the link member are kept inclined at a predetermined angle, and the link stay coupled with the fastener of the implant fastener 13 and ball-connected thereto. In proportion to the amount of advance of the link (14), the link bar 15 can be rotated about both ends of the pin coupling portion at both ends.

When the link bars 15 on both sides are unfolded on both sides, the tip portions of the implant bodies 10a and 10b coupled to the pins 18b at one end thereof may be extended outward.

At this time, when the link bar 15 is maximally opened so as to be horizontally supported by the supporting jaw 17 in the implant bodies 10a and 10b, the tip portions of the implant bodies 10a and 10b are maximum. The extended state.

As such, when the fastening operation of the implant fastener 13 and the operation of the link member are completed and the tip ends of the implant bodies 10a and 10b are in the maximum expansion state, as shown in FIG. 4, the implant body The distal end portions 10a and 10b are properly extended between the wide anterior spaces between the vertebral bodies to complete the fastening process of the spinal fusion implant.

That is, when the tip of the spinal fusion implant 10 is expanded after insertion, the spinal fusion implant 10 is inserted and positioned appropriately at a wide front gap and a relatively narrow rear gap between adjacent vertebral bodies by this extended portion, and thus is placed. The insertion process associated with the procedure can be completed.

The spinal fusion implant 10 of the present invention may be made of any material suitable for human implantation, including metals such as cobalt, chromium, stainless steel, titanium, plastics, ceramic composites, internally soft hydroxide hydroxide or any The bone growth inducing material, such as other bone conduction, osteoinductive, bone forming materials or other fusion enhancing materials, may be filled or coated.

The spinal fusion implant 10 according to the present invention, as shown in Figure 9, can be inserted in both two places to balance the support of the spine on both sides while maximizing the risk of nerve damage during the procedure.

That is, as shown in Figure 5, the two vertebral fusion implants (10) both bent inward as viewed in the direction of insertion has an arrangement structure in which the front is gathered up and down between the vertebra and the vertebrae In addition, the relationship between left and right can be balanced and stable.

In addition, the inside of the spinal fusion implant 10 may be filled with bone materials such as bone conduction, osteoinduction, bone forming materials, and the like, or fusion promoting materials, before or after the insertion, and some of these materials may be bones to be implanted from the patient. Alternatively, it may be a material for inducing bone growth.

As described above, the present invention provides a link member for properly positioning the front and rear spaces between adjacent vertebrae by expanding the tip after completion of insertion of the spinal fusion implant, and naturally inducing the tip extension of the spinal fusion implant. By providing the spinal fusion implants employed, problems such as improperly damaged bones can be completely eliminated, thus ensuring stable and rapid removal of spinal fusion implants and their surrounding bones in connection with spinal fusion procedures. It is possible to improve the bone growth and safety after the procedure, and ultimately help the patient to improve the bone growth and safety after the procedure, and to give the doctor a psychological stability for the ease of the procedure. The advantage of the procedure being safe and efficient overall It is.

Claims (5)

It has a pair of implant bodies (10a, 10b) and a screw hole (11) penetrating through the center and are combined side by side facing each other through the pin coupling portion of the rear end and expandable by using the tip portion Implant support 12 supporting the rear end pin engaging portions of 10a and 10b, and fastened to the screw holes 11 of the implant support 12 and implanted bodies 10a and 10b. An implant fastener 13 which provides a fastening force for distal extension of the implant fastener 13 and a pair of implant fasteners 13 and a pair of implant bodies 10a, 10b, respectively; A spinal fusion implant, characterized in that it comprises a link member that receives a fastening force from the pair of the implant body (10a, 10b) spread outwards. The link member of claim 1, wherein the link member is ball-coupled to the tip of the implant fastener 13 and moves forward and backward integrally, and one end is pin-coupled to the tip of the link stay 14 together. At the same time, each other end is composed of two link bars 15 which are pin-coupled to the pair of implant bodies 10a and 10b, respectively, to enable linkage with the link stay 13. Spine fusion implant, characterized in that. 2. The spinal fusion implant according to claim 1, wherein the outer surface of the implant body (10a, 10b) is an uneven surface (16). 2. The spinal fusion implant according to claim 1, wherein the pair of implant bodies (10a, 10b) take a certain amount of bending in the same direction in a combined state facing each other. 4. An inner side tip of the implant body (10a) (10b) is provided with a support (17) serving as a stopper for limiting the maximum unfolding action of the link bar (15). Spine fusion implant, characterized in that.