KR20230111419A - An medical instrument set for implanting an spine insert - Google Patents

Abstract

The present invention relates to a set of medical instruments for implanting an intervertebral insert, and more particularly, to a set of medical instruments for implanting an intervertebral implant capable of incising only one spinal joint, removing an intervertebral disc, inserting and rotating the intervertebral insert, thereby preserving one spinal joint, reducing muscle damage or bleeding, and increasing patient satisfaction.

Description

A medical instrument set for implanting an intervertebral insert {An medical instrument set for implanting an spine insert}

The present invention relates to a set of medical instruments for implanting an intervertebral insert, and more particularly, to a set of medical instruments for implanting an intervertebral implant capable of incising only one spinal joint, removing an intervertebral disc, inserting and rotating the intervertebral insert, thereby preserving one spinal joint, reducing muscle damage or bleeding, and increasing patient satisfaction.

The intervertebral disc is a cartilage structure that connects the vertebrae in the spine, enabling movement between the two vertebrae bodies while stably supporting and protecting the two vertebrae bodies. Intervertebral discs are also called intervertebral discs or discs.

These intervertebral discs are composed of the structure of the annulus fibrosus and the nucleus pulposus. The annulus fibrosus controls the movement of the vertebral fragments, and the inner nucleus pulposus consists of 70-80% water. It buffers or transmits the load and shock applied in the vertical direction. In degenerative disc disease, the annulus fibrosus is weakened in its ability to move or contain the nucleus pulposus, and its water content is reduced. Due to the above complex results, diseases such as spinal stenosis, osteophyte formation, disc herniation, and nerve root compression occur.

Lumbar interbody fusion, which is one method of treating diseases caused by intervertebral discs, is generally performed by inserting a prosthetic material between the vertebrae. The prosthetic material is generally inserted to fuse adjacent vertebrae into one after removing the damaged vertebrae, and is manufactured in various shapes and sizes, such as a circular ring and a rectangular parallelepiped. In addition, the prosthetic material is used by inserting a bone fragment extracted from a patient, another person's bone fragment, or an artificial bone fragment. In addition, it has a structure in which a hollow is formed to further enhance the fusion effect between vertebrae. Prosthetic materials are called by various terms such as cage, spine insert, artificial disc, and implant.

Conventional posterior lumbar interbody fusion involves incising both spinal muscles to secure an insertion space for inserting an intervertebral implant, removing a spinal joint, and then inserting two intervertebral implants. Therefore, there is a problem in that the patient's recovery is slow. In addition, anterior lumbar interbody fusion is very risky because it is necessary to enter the anterior side of the spine through which major structures such as the aorta and vena cava pass during surgery. In lateral lumbar interbody fusion, a cage suitable for the size of the disc can be inserted, but decompression of the posterior nerve is almost impossible, and there is a risk of lumbar plexus injury and damage to the psoas muscle. Therefore, in lumbar interbody fusion, there is a need for a technology for an intervertebral insert to solve problems such as reducing blood loss, shortening operation time, and reducing patient aftereffect.

As the prior art, Republic of Korea Patent Registration No. 10-1862984, "Outer tube of cage insertion device for spine surgery" is described.

Therefore, the present invention has been proposed to improve such conventional problems, and an object of the present invention is to provide a set of medical instruments for transplanting an intervertebral insert that can incise only one spinal joint, remove an intervertebral disc, and insert and rotate an intervertebral insert to reduce muscle damage and bleeding and increase patient satisfaction.

In order to solve the above problems, in intervertebral fusion surgery in which an intervertebral insert is inserted between the vertebrae, which is the space between the vertebrae, so that the spine functions normally, the set of medical instruments for implanting the intervertebral insert according to an embodiment of the present invention includes: an intervertebral disc removal device that removes the intervertebral disc inside the intervertebral body to insert the intervertebral insert; It may include an intervertebral insert inserting device for inserting the intervertebral insert into the intervertebral body and an intervertebral insert rotating mechanism for moving the intervertebral insert inside the intervertebral body to be located at a position desired by a medical staff.

In addition, the intervertebral disc removal mechanism includes a removal body whose middle part is bent upward so that it can reach the intervertebral disc on the opposite side by being inserted between the vertebrae in which only one vertebra joint has been cut; It may include a removal handle formed at the rear end of the removal body and a removal means formed at the front end of the removal body and provided with a removal hole in a lateral direction to detach and scrape the intervertebral discs.

In addition, the intervertebral disc removal mechanism further includes an auxiliary removal unit for easily peeling and scraping off the intervertebral disc by moving the removal body accommodated inside the removal handle in the forward and backward directions, wherein the auxiliary removal unit includes an upper surface groove formed on an upper surface of the removal handle to have a predetermined length along the longitudinal direction; an auxiliary manipulation unit formed on the rear side of the removal body, formed to pass through the upper surface groove, and moving in a forward and backward direction along the upper surface groove; It is formed inside the removal handle to have a certain length along the longitudinal direction, and is formed at the rear end of the removal body and an inner groove provided with a connection hole so that the removal body can pass through the front side, and is accommodated in the inner groove and moves in the forward and backward directions.

In addition, the auxiliary removal unit may further include a fine removal groove formed in the upper surface groove and allowing the auxiliary manipulation unit to be inserted and moved in a lateral direction.

In addition, the intervertebral insert insertion mechanism includes a fixing part formed in a tubular shape; Doedoe connected to the fixing portion, the insertion handle formed in the vertical direction so that the hand can be gripped without breaking; It may include an insertion operation unit accommodated inside the fixing unit and formed to be rotatable, and a bracket unit formed on the rear side of the fixing unit and the insertion operation unit.

In addition, the fixing part is formed in a tubular shape and is formed in a pair at a position spaced apart from the fixing body hole formed at the front end of the fixing body and the fixing body hole formed at the front end of the fixing body by a predetermined interval, and has a fixed length to the outside. It may include a fixing protrusion formed to have.

In addition, the insertion operation unit is accommodated inside the fixed body, the cross section is formed in the form of a circular bar, rotated, and the operation body formed longer than the fixed body; It may include a manipulation knob formed at the rear end of the manipulation body and having a larger diameter than that of the manipulation body, and a coupling protrusion formed at the front end of the manipulation body and having a screw thread capable of screwing with the intervertebral insert on an outer circumferential surface thereof.

In addition, the rotation mechanism of the intervertebral insert includes a rotating body formed in a bar shape; It may include a rotating handle formed at the rear end of the rotating body to rotate the intervertebral insert by hitting a rear surface with a medical hammer, and a rotating means formed at the front end of the rotating body to have a certain area and contact the intervertebral insert.

The rotation mechanism of the intervertebral insert may further include a striking portion configured to finely rotate the intervertebral insert, and the striking portion may include a rotation handle groove formed inwardly on a rear surface of the rotation handle and formed with bent portions continuously along a longitudinal direction of an inner circumferential surface thereof, and a striking member formed to be inserted into the rotation handle groove and formed with a striking protrusion inserted into the bent portion on an outer surface thereof.

In addition, the rotating means may include a rotating protrusion that protrudes from the front and has a pointed end and is inserted into the rear side of the intervertebral insert to adjust the position of the intervertebral insert inside the intervertebral body in a temporarily coupled state.

In the medical instrument set for transplanting an intervertebral insert according to an embodiment of the present invention, only one side of the spinal joint is cut, the intervertebral disc is removed, and the intervertebral insert is inserted and rotated, thereby reducing muscle damage and bleeding and increasing patient satisfaction.

In addition, the intervertebral disc can be easily removed through the auxiliary removal unit of the intervertebral disc removing device.

In addition, the intervertebral insert can be expanded in the vertical direction through the extension bar of the intervertebral insert inserting instrument, so that the supporting area within the intervertebral body can be widened.

In addition, the position of the intervertebral insert may be adjusted by minutely rotating the intervertebral insert through the impact portion of the intervertebral insert rotation mechanism.

In addition, the position of the intervertebral insert may be adjusted through the rotating protrusion of the intervertebral insert rotating mechanism.

In addition, the effects according to the embodiments of the present invention mentioned above are not limited to the described contents, and may further include all effects predictable from the specification and drawings.

1 is a configuration diagram showing the overall configuration of a set of medical instruments for implanting an intervertebral insert according to an embodiment of the present invention.
FIG. 2 is a rotational perspective view showing the appearance of the intervertebral disc removal mechanism of FIG. 1;
Figure 3 is a side view of Figure 2;
Figure 4 is a rotational perspective view showing a state including a secondary removal portion in Figure 2;
Figure 5 is a side view of Figure 4;
Figure 6 (a) and (b) is an example of the operation of Figure 4.
Figures 7 (a) and (b) are exemplary views showing the state of removing the intervertebral disc by Figure 4;
FIG. 8 is a rotated perspective view of the intervertebral implant insertion mechanism of FIG. 1;
Figure 9 is a front sectional view of Figure 8;
FIG. 10 is a rotational perspective view illustrating the intervertebral insert inserted between the vertebrae of FIG. 8;
11 is a rotational perspective view illustrating a rod in which FIGS. 8 and 10 are combined;
12 (a) and (b) are exemplary diagrams illustrating the process of inserting the intervertebral implant between the vertebrae according to FIG. 8;
13 is a rotational perspective view showing a state in which the insertion rod is fastened to FIG. 8;
FIG. 14 is a rotational perspective view illustrating another type of intervertebral insert inserted between the vertebrae of FIG. 13;
Fig. 15 is a separated rotational perspective view of Fig. 14;
16(a) and (b) are exemplary diagrams illustrating how FIG. 14 is combined with FIG. 13 and operated.
17 (a) to (c) are exemplary views illustrating a process of inserting FIG. 14 between the vertebrae of FIG. 13;
Figure 18 (a) and (b) is an exemplary view showing the appearance of Figure 14 that varies depending on the thickness of the insertion rod fastened to Figure 13.
FIG. 19 is a rotated perspective view of the intervertebral insert rotating mechanism of FIG. 1;
FIG. 20 is an exemplary view illustrating the state in which the intervertebral implant of FIG. 19 rotates inside the intervertebral body;
21(a) and (b) are exemplary diagrams illustrating the state in which rotation protrusions are formed in FIG. 19 to adjust the position of the intervertebral insert inside the intervertebral body.
22 is a rotational perspective view showing a state including a hitting part in FIG. 19;
23 is a separated rotational perspective view showing a state in which the impact unit is separated in FIG. 22;
Fig. 24 is a front sectional view of Fig. 22;
25(a) to (c) are exemplary views illustrating the process of rotating the intervertebral insert of FIG. 22 inside the intervertebral body;

Hereinafter, the description of the present invention with reference to the drawings is not limited to specific embodiments, and various transformations may be applied and various embodiments may be applied. In addition, the content described below should be understood to include all conversions, equivalents, or substitutes included in the spirit and scope of the present invention.

In the following description, terms such as first and second are terms used to describe various components, and are not limited in meaning per se, and are used only for the purpose of distinguishing one component from another.

Like reference numbers used throughout this specification indicate like elements.

Singular expressions used in the present invention include plural expressions unless the context clearly dictates otherwise. In addition, terms such as "comprise", "comprise" or "having" described below should be interpreted as indicating that a feature, number, step, operation, component, part, or combination thereof described in the specification exists, and it should be understood that the existence or addition of one or more other features, numbers, steps, operations, components, parts, or combinations thereof is not excluded in advance.

Hereinafter, an embodiment of the present invention will be described in detail with reference to FIGS. 1 to 25 attached.

In addition, the direction in which an intervertebral insert is inserted between the vertebrae centering on a medical device for transplanting an intervertebral insert is referred to as 'anterior', and the opposite direction is referred to as 'rear'. Accordingly, terms indicating directions such as 'left', 'right', 'upper' and 'downer' are defined as indicating respective directions based on the anterior and posterior directions.

First, in the technical field of the present invention, a set of medical instruments for transplanting an intervertebral insert is used for lumbar interbody fusion. After removing an intervertebral intervertebral disc of a damaged human body, the intervertebral insert 4 is inserted between the vertebrae, which is the space between two adjacent vertebrae (S), so that the original height of the intervertebral disc is maintained and the function of the spine is restored.

These lumbar interbody fusions are divided into posterior lumbar interbody fusion (PLIF), lateral lumbar interbody fusion (TLIF), extraforaminal lumbar interbody fusion (EFFLIF, ELIF), and oblique lumbar interbody fusion depending on the direction in which the intervertebral implant (4) is inserted. It is classified into lateral lumbar interbody fusion (OLIF) and anterior lumbar interbody fusion (ALIF). The medical instrument set for transplanting the intervertebral insert according to the embodiment of the present invention is preferably used for extraforaminal lumbar interbody fusion (EFLIF, ELIF), but is not limited thereto and can be used for all of the above-described lumbar interbody fusion.

Specifically, extraforaminal lumbar interbody fusion (EFFLIF, ELIF) is an operation in which a joint in the spine is removed using a set of medical instruments through Kambin's triangle working zone and an intervertebral implant (4) is inserted. Here, the working area of the Cambin triangle refers to the space formed between the lateral edge of the transverse nerve, the nerve root, and the upper endplate of the lower spine. The present invention relates to a set of medical instruments for implanting an intervertebral insert used in lumbar interbody fusion, in particular, extraforaminal lumbar interbody fusion.

1 is a configuration diagram showing the overall configuration of a set of medical instruments for implanting an intervertebral insert according to an embodiment of the present invention.

Referring to FIG. 1 , a medical instrument set for transplanting an intervertebral implant according to an embodiment of the present invention may include an intervertebral disc removal instrument 1, an intervertebral implant insertion instrument 2, and an intervertebral implant rotation instrument 3. First, the role of each component of the medical instrument set for implanting the intervertebral insert will be briefly described, and then described in detail with reference to FIGS. 2 to 25 .

The intervertebral disc removal device 1 is a device for removing the intervertebral discs between the intervertebral bodies of the vertebrae where lumbar interbody fusion is required. The intervertebral disc removing mechanism 1 can scrape the intervertebral disc by entering the insertion space secured for the intervertebral insert 4 to be inserted into the intervertebral body.

The intervertebral insert insertion device 2 may enter through the insertion space and insert the intervertebral insert 4 between the vertebrae from which the intervertebral discs have been removed by the intervertebral disc removal device 1 .

The intervertebral insert rotating device 3 rotates the intervertebral insert 4 inserted between the vertebrae by the intervertebral insert inserting device 2 so that the position can be adjusted according to the request of the medical staff.

In addition, the medical instrument set for transplanting the intervertebral implant according to the embodiment of the present invention can be used together with medical instruments used in conventional lumbar interbody fusion surgery.

FIG. 2 is a rotated perspective view showing the appearance of the intervertebral disc removal mechanism of FIG. 1, FIG. 3 is a side view of FIG. 2, FIG. 4 is a rotated perspective view showing a state including an auxiliary removal unit in FIG. 2, FIG. 5 is a side view of FIG. 4, FIGS. 6 (a) and (b) are operational examples of FIG. It is also

Referring to FIGS. 2 to 7 , in interbody fusion surgery in which an intervertebral insert 4 is inserted between the vertebrae, which is a space between vertebrae, so that the spine functions normally, the intervertebral disc removal device 1 of the present invention may be a device that removes the intervertebral disc inside the intervertebral body to insert the intervertebral insert 4.

The intervertebral disc removal mechanism 1 may include a removal body 10 , a removal handle 11 and a removal means 12 .

The removal body 10 may be formed such that a middle portion of the body 10 is bent upward so that only one side of the spinal joint is inserted between the incised vertebrae and reaches the intervertebral disc on the opposite side. The removal body 10 may be manufactured by determining the bending angle of the middle part according to the user's request.

Here, the state in which only one side of the spinal joint is incised may be a state in which the opposite intervertebral disc is not visible. The removal body 10 has the advantage of being able to remove the intervertebral disc even if the opposite intervertebral disc is not visible because the middle part is formed by bending.

The removal handle 11 is formed at the rear end of the removal body 10, and may be formed in a cylindrical shape with a certain length to facilitate gripping. However, it is not limited to this and may be formed in various ways as long as the medical staff can grip it by hand.

The removal means 12 is formed at the front end of the removal body 10, and a removal hole 120 is provided in the lateral direction so that the intervertebral discs can be removed by peeling and scraping.

Referring to FIGS. 4 to 8 , the intervertebral disc removal mechanism 1 may further include an auxiliary removal unit 13 .

The auxiliary removal unit 13 can move the removal body 10 forward and backward to easily separate and scrape the intervertebral discs. The auxiliary removal unit 13 may include an auxiliary manipulation unit 130, an upper surface groove 131, an inner groove 132, and a removal body plate 133.

The auxiliary manipulation unit 130 is formed on the rear side of the removal body 10, is accommodated in the upper surface groove 131 and is formed to protrude to the outside, and can move in the forward and backward directions along the upper surface groove 131. The auxiliary manipulation unit 130 is preferably formed in a 'T' shape to facilitate manipulation, but is not limited thereto.

The upper surface groove 131 may be formed to have a predetermined length along the longitudinal direction on the upper surface of the removal handle 11 . The upper surface groove 131 can be manufactured in length according to the request of the medical staff, which can be the forward and backward movement distance of the removal body 10 and the removal means 12.

The inner groove 132 is formed on the inside of the removal handle 11 to have a certain length along the longitudinal direction, and a connection hole (not shown) may be provided on the front surface so that the removal body 10 can pass through.

The removal body plate 133 is formed at the rear end of the removal body 10 and is accommodated in the inner groove 132 so as to be movable in the forward and backward directions. The removal body plate 133 is provided with a spring 1330 to the rear side, and can be moved to the rear side by manipulation of the auxiliary manipulation unit 130 and then returned to the front side by the spring 1330.

Specifically, as shown in (a) of FIG. 6, when the auxiliary manipulation unit 130 is located on the front side of the upper surface groove 131, the removal body plate 133 accommodated in the inner groove 132 is in contact with the front surface of the inner groove 132, and the spring 1330 on the rear side may occupy most of the inner groove 132. Then, as shown in (b) of FIG. 6 by the medical staff, when the auxiliary manipulation unit 130 is moved to the rear side, the removal body plate 133 accommodated in the inner groove 132 is moved to the rear side, and the removal body 10 and the removal means 12 are also moved to the rear side, and the spring 1330 can be compressed. Finally, the auxiliary manipulation unit 130 may be moved forward again by the spring 1330 as shown in (a) of FIG. 6 .

Referring to FIG. 7 , the auxiliary removal unit 13 can easily detach and scrape the intervertebral disc from the inside of the intervertebral body. The intervertebral disc removing device 1 can be inserted into the insertion space and reach the opposite intervertebral disc as shown in FIG. 7(a) and can be separated. At this time, when the medical staff moves the auxiliary manipulation unit 130 rearward using the auxiliary removal unit 13, the removal body 10 and the removal means 12 may move rearward as shown in FIG. 7(b). And again, it can move forward as shown in (a) of FIG. 7 by the force of the spring 1330 to return. By moving the removal body 10 and the removal means 12 in the forward and backward directions, the intervertebral discs can be easily peeled off and scraped off.

In addition, the auxiliary removal unit 13 may further include a fine removal groove (not shown).

The fine removal groove is formed on the side surface of the upper surface groove 131, and the auxiliary manipulation unit 130 can be inserted and moved in the lateral direction.

The fine removal groove allows the auxiliary manipulation unit 130 to move in the lateral direction so that the removal body 10 and the removal means 12 can remove the intervertebral disc in the lateral direction. At this time, the length of the fine removal groove is the moving distance of the removal body 10 and the removal means 12, and it is most preferable that it is shorter than the distance between the vertebrae.

FIG. 8 is a rotated perspective view showing the appearance of the intervertebral insert inserting mechanism of FIG. 1, FIG. 9 is a front cross-sectional view of FIG. 8, FIG. 10 is a rotated perspective view showing the intervertebral insert inserted between the vertebrae of FIG. FIG. 13 is a rotated perspective view showing a state in which the insertion rod is fastened in FIG. 8, FIG. 14 is a rotated perspective view showing another type of intervertebral insert inserted between the vertebrae of FIG. 13, FIG. 15 is an exploded and rotated perspective view of FIG. c) is an exemplary view showing the process of inserting FIG. 14 between vertebrae in FIG. 13, and FIGS. 18 (a) and (b) are exemplary diagrams showing the appearance of FIG.

Referring to FIGS. 8 and 9 , the intervertebral insert insertion instrument 2 of the present invention may be an instrument for inserting the intervertebral insert 4 into the intervertebral body.

The intervertebral insert insertion device 2 may include a fixing part 20 , an insertion handle 21 , an insertion manipulation part 22 , and a bracket part 23 .

The fixing part 20 is formed in a tubular shape and may include a fixing body 200 and a fixing protrusion 201 .

The fixed body 200 is formed in a tubular shape, and a fixed body hole (not shown) is formed at the front end, and the insertion manipulation unit 22 may be accommodated therein.

The fixing protrusions 201 are formed as a pair at a position spaced apart from the fixing body hole by a certain distance in the upper and lower directions, and may be formed to have a certain length outward. The fixing protrusion 201 can be inserted and fixed into the fixing groove 451 of the intervertebral insert 4 due to the above configuration.

The insertion handle 21 is connected to the fixing part 20 and may be formed in a vertical direction so that the hands can be gripped without being broken. The insertion handle 21 may be formed with a handle coupling ring 210 so that it can be installed in the middle portion of the fixing body 200 of the fixing part 20 .

The handle coupling ring 210 is formed so that the fixing body 200 passes through the upper side, and may be formed to be fitted with the fixing body 200.

The insertion operation unit 22 may be formed to be accommodated inside the fixing unit 20 so as to be rotatable. The insertion operation unit 22 may include an operation body 220, an operation handle 221 and a coupling protrusion 222.

The manipulation body 220 is accommodated inside the fixed body 200, the cross section is formed in a circular bar shape, rotates, and may be longer than the fixed body 200.

The manipulation handle 221 is formed at the rear end of the manipulation body 220 and has a larger diameter than the diameter of the manipulation body 220 so as not to enter the fixing body 200 .

The manipulation handle 221 has protrusions formed along the outer circumferential surface so as to be spaced apart at regular intervals so that a medical staff can easily hold and rotate the handle 221 . However, it is not limited to this, and any form in which rotational force is transmitted to the control handle 221 so that the control body 220 rotates can be used.

The coupling protrusion 222 is formed at the front end of the manipulation body 220, and a screw thread capable of screwing with the intervertebral insert 4 may be formed on the outer circumferential surface.

The bracket part 23 is formed on the rear side of the fixing part 20 and the insertion operation part 22, and includes a fastening groove (not shown), a through hole (not shown) and an operation hole 230 to hold the fixing part 20 and the insertion operation part 22.

The fastening groove is formed to be coupled with the other end surface of the fixed body 200, and may be formed on the front surface.

The through hole is formed so that the fastening groove and the manipulation hole 230 communicate with each other, and may be formed to have a diameter through which the manipulation body 220 can penetrate.

The manipulation hole 230 communicates with the through hole and may be formed in a lateral direction so that the manipulation handle 221 is accommodated. The manipulation hole 230 may allow a medical staff to hold the manipulation knob 221 and rotate it easily.

Referring to FIG. 10 , the intervertebral insert 4 coupled to the intervertebral insert inserting device 2 of the present invention and inserted between the vertebrae may include an insertion portion 40, a body portion 41, a bone graft filling hole 43, a bone graft moving hole 44, and a coupling portion 45.

The insertion unit 40 is first entered and inserted between the vertebrae, which is the space between the vertebrae (S), and may be formed in a form narrowed toward the entry direction to facilitate insertion.

The body portion 41 is formed to extend to the rear side of the insertion portion 10, and may have a height and size capable of supporting and maintaining the intervertebral body.

In addition, the body portion 41 may be formed with a protruding portion 410 . Protrusions 410 are formed to protrude in the direction of the vertebrae (S) on both sides, and may be continuously arranged at regular intervals. The protrusion 21 has a constant inclination on the front and rear sides, but the posterior inclination is preferably formed more steeply than the anterior inclination so that the intervertebral insert 4 can be easily entered and prevented from moving to the rear side, but is not limited thereto. In addition, the protrusion 410 can be more firmly fused with the two vertebrae without slipping inside the intervertebral body.

The bone graft filling hole 43 is formed to pass through the upper and lower surfaces so that the bone graft material can be filled. Both side surfaces of the bone graft movement hole 44 are formed to pass through, and communicate with the bone graft filling hole 43 so that the filled bone graft material can be filled between the vertebrae without gaps.

The bone graft filling hole 43 and the bone graft moving hole 44 as described above can allow the bone graft material to be smoothly filled in the intervertebral body and prevent empty space from occurring by increasing the density of the filled bone graft material.

Here, after the intervertebral insert 4 is inserted between the vertebrae, the bone graft material can be filled in the bone graft filling hole 43 and the bone graft moving hole 44 . The bone graft material filled in the bone graft filling hole 43 and the bone graft moving hole 44 may cause bone growth over time to enable fusion between vertebrae.

As the bone graft material, autologous bone fragments, osteoinductive protein, and the like collected from the patient's long bones may be used, but are not limited thereto, and all bone graft materials used in the technical field of the present invention may be used.

The coupling portion 45 is formed to extend from the rear side of the body portion 41, and may be formed to be coupled with the intervertebral insert insertion device 2 of the present invention. To this end, the coupling part 45 may include a coupling hole 450 and a fixing groove 451 .

The coupling hole 450 is formed in the center of the rear end surface, and a screw thread may be formed on the inside so as to be coupled with the coupling protrusion 222 of the intervertebral insert insertion device 2 .

The fixing groove 451 is formed as a pair at a position spaced apart from the coupling hole 450 by a certain distance in the upper and lower directions, and is formed to have a certain depth inward, so that the fixing protrusion 201 of the intervertebral insert insertion device 2 can be inserted.

In addition, the intervertebral insert 4 may form a bottom edge 46 connected to the insertion portion 40 and the body portion 41 . The bottom edge 46 is a part that first enters the intervertebral body and contacts the inside of the intervertebral body, and is preferably formed gently to facilitate rotation inside the intervertebral body, but is not limited thereto.

In addition, the intervertebral insert 4 may be made of inert hard metal, rhodium, platinum, medical stainless steel, cobalt-chromium-molybdenum alloy, zirconium oxide, zirconium, titanium, plastic, hafnium, PEEK, etc., and most preferably, PEEK material, which is excellent in processability and durability, is used. However, it is not limited to this, and all materials suitable for the human body that are harmless to the body can be used.

In addition, the intervertebral insert 4 has a marker (not shown) accommodated therein along the longitudinal direction, so that the position of the intervertebral insert 4 can be adjusted while a medical staff checks the position of the marker during surgery. Here, any marker used in the technical field of the present invention can be used, and the location and method of accommodating the marker in the intervertebral insert 4 are not limited.

Referring to FIG. 11 , the intervertebral insert inserting device 2 can be combined with the intervertebral insert 4 through the above configuration. Specifically, in the intervertebral insert inserting instrument 2, the fixing protrusion 201 can be inserted into the fixing groove 451 of the intervertebral insert 4 and coupled thereto, and the coupling protrusion 222 can be screwed into the coupling hole 450 while the operating body 220 and the coupling protrusion 222 rotate by manipulating the operating knob 221. At this time, the medical staff can operate the operation handle 221 with the other hand while holding the insertion handle 21 with one hand, so that precise work can be performed.

Referring to FIG. 12 , the intervertebral insert inserter 2 is combined with the intervertebral insert 4 to insert the intervertebral insert 4 into the intervertebral body. Then, by manipulating the handle 221 of the intervertebral insert insertion instrument 2, the coupling protrusion 222 can be separated from the coupling hole 450, and the fixing protrusion 201 can be separated from the fixing groove 451 at the same time. Accordingly, the intervertebral insert 4 remains inside the intervertebral body, and the intervertebral insert insertion instrument 2 can be taken out of the human body.

Referring to FIG. 13 , the intervertebral insert insertion device 2 of the present invention may further include an extension bar 223 .

The extension bar 223 is formed in a bar shape having a certain length, and the front end may be coupled with the insertion rod 471 of the intervertebral insert 4 and the rear end coupled with the coupling protrusion 222 . The extension bar 223 may be smaller than the diameters of the insertion rod 471 and the coupling protrusion 222 . The extension bar 223 is formed in a circular or hexagonal cross section, and the insertion rod 471 and the coupling protrusion 222 are formed in a shape capable of being coupled thereto and coupled to each other. As the coupling method, any method used in the technical field of the present invention can be used.

At this time, referring to FIGS. 14 and 15 , the intervertebral insert 4 may further include an expansion part 47 so that the extension bar 223 can be inserted into the inside to expand in size in the vertical direction. In addition, the body portion 41 of the intervertebral insert 4 may include an accommodation hole 411 and an insertion groove 412 .

The accommodating hole 411 is a space in which the expansion part 47 is accommodated, and may be formed to pass through the upper and lower surfaces of the body part 41 between the plurality of bone graft filling holes 43 formed therein. In addition, the accommodating hole 411 may have a locking groove 4110 formed on an inner circumferential surface thereof to prevent the extension part 47 from being separated.

The insertion groove 412 is formed toward the insertion part 40 from the position of the bone graft movement hole 44 facing the coupling hole 450, communicates with the accommodation hole 411, and has a certain depth on the inner circumferential surface of the accommodation hole 411. It may be formed.

The expansion parts 47 may be formed as a pair so as to extend vertically from the body part 41 to secure a support area inside the vertebrae. To this end, the extension part 47 may include an extension bar 470, an insertion rod 471, and an extension head 472.

The extension bar 470 is accommodated in the receiving hole 411, and is provided with a locking means 4700 and a spring 4701 formed to protrude from the outer surface, so that it can move vertically along the locking groove 4110. In addition, the end of the extension bar 470 toward the center of the body portion 41 may be formed in a curved shape.

The insertion rod 471 is detachably attached to the intervertebral insert insertion instrument 2, and the extension bar 470 can be moved to the outside of the body portion 41 while being inserted into the insertion groove 412. The insertion rod 471 preferably has a diameter smaller than the diameter of the coupling hole 450 and the coupling protrusion 222 so as to penetrate the coupling hole 450 of the body portion 41, but is not limited thereto.

The extension head 472 is connected to the extension bar 470 and is formed to protrude from the upper and lower surfaces of the body 41, and may be formed to have a length in the forward and backward directions. The extension head 472 is provided with a charging protrusion 4720 so that the extension 47 can easily support the intervertebral body. The charging protrusion 4720 may be formed on a surface in contact with the body portion 41 and inserted into the bone graft charging hole 43 .

In addition, it is preferable that the extended head 472 be formed at the same height as the body 41 to support the intervertebral body, but is not limited thereto. It is preferable that the thickness of the extension head 472 protrudes in the vertical direction is formed to a thickness that does not interfere with the insertion of the intervertebral insert 4 between the vertebrae.

Referring to FIG. 16 , the intervertebral insert inserting instrument 2 may operate the extension part 47 while inserting the extension bar 223 into the intervertebral insert 4 .

Specifically, as shown in (a) of FIG. 16, the intervertebral insert inserting instrument 2 may be combined with the intervertebral insert 4 in a state in which the extension bar 223 and the insertion rod 471 are coupled. Then, as shown in (b) of FIG. 16, when the insertion rod 471 is inserted into the insertion groove 412, one end of the insertion rod 471 comes into contact with the curve of the extension bar 470, presses the extension bar 470, advances toward the insertion portion 40, and extends the extension bar 470 to the outside of the body portion 41.

Referring to (a) of FIG. 17 , the intervertebral insert insertion instrument 2 may insert the intervertebral insert 4 into the intervertebral body in a state of being coupled with the intervertebral insert 4 from the outside of the human body. At this time, the extension bar 223 is coupled to the front of the coupling protrusion 222 of the intervertebral insert insertion instrument 2, and the insertion bar 471 is coupled to the front of the extension bar 223. Then, as shown in (b) of FIG. 17, by manipulating the handle 221 of the intervertebral insert insertion instrument 2, the insertion rod 471 is inserted into the insertion groove 412 while advancing toward the insertion portion 40, and the extension bar 470 of the intervertebral insert 4 can be expanded in the vertical direction.

Finally, as shown in (c) of FIG. 17, the manipulation knob 221 of the intervertebral insert insertion instrument 2 is manipulated in the opposite direction to separate the insertion rod 471 and the extension bar 223, separate the coupling protrusion 222 from the coupling hole 450, and simultaneously separate the fixing protrusion 201 from the fixing groove 451. Accordingly, the intervertebral insert 4 remains inside the intervertebral body, and the intervertebral insert insertion instrument 2 can be taken out of the human body.

In addition, the insertion rod 471 may be provided with a plurality of different thicknesses. The insertion rod 471 may be used by selecting an insertion rod 471 having a thickness in which the expansion part 47 expands according to the surgical site and being fastened to the intervertebral insert insertion instrument 2 . Thus, the medical staff has the advantage of selecting one of the plurality of insertion rods 471 by pre-calculating the support area in which the extension part 47 is formed to fit the patient's body.

Specifically, as shown in (a) of FIG. 18, the intervertebral insert inserting instrument 2 inserts the insertion rod 471 into the insertion groove 412 inside the body portion 41 of the intervertebral insert 4, and connects the extension head 73 in the vertical direction. On the other hand, in the case of a patient with a large intervertebral disc, as shown in FIG. 18(b), the extension head 472 can be extended more outward by using an insertion rod 471 having a larger size than the insertion rod 471 used in FIG. 18(a). Thus, the intervertebral insert inserting instrument 2 allows the extension part 47 of the intervertebral insert 4 to operate, and to secure a larger support area inside the intervertebral body in accordance with the patient's body.

FIG. 19 is a rotational perspective view showing the rotational mechanism of the intervertebral insert of FIG. 1, FIG. 20 is an exemplary view showing how the intervertebral implant of FIG. 19 is rotated inside the intervertebral body, FIGS. FIG. 23 is a separated and rotated perspective view showing a state in which the impact unit is separated in FIG. 22, FIG. 24 is a front cross-sectional view of FIG. 22, and FIG. 25 (a) to (c) are exemplary views illustrating the process of rotating the intervertebral insert in FIG. 22 inside the intervertebral body.

Referring to FIGS. 19 to 25 , the intervertebral insert rotating mechanism 3 of the present invention can move the intervertebral insert 4 located inside the intervertebral body to be positioned at a point desired by a medical staff.

In general, the intervertebral implant 4 can be inserted and rotated using the intervertebral implant insertion instrument 2 . However, since the intervertebral insert insertion instrument 2 is hit by a medical hammer in a state in which the intervertebral implant 4 is coupled, the screwed intervertebral insert insertion instrument 2 and the intervertebral insert 4 can be easily loosened and the screw thread of the coupling protrusion 222 can be damaged.

To solve this problem, a set of medical instruments for implanting an intervertebral insert according to an embodiment of the present invention is provided with a separate rotation mechanism 3 for the intervertebral insert. Accordingly, the intervertebral insert rotating mechanism 3 may adjust the position of the intervertebral insert 4 by rotating the intervertebral insert 4 inside the intervertebral body. In addition, breakage can be prevented by having the intervertebral insert inserting instrument 2 perform only a role of inserting the intervertebral insert 4 .

The intervertebral insert rotating mechanism 3 serving as described above may include a rotating body 30 , a rotating handle 31 and a rotating means 32 .

The rotating body 30 is formed in a bar shape, and may be formed to have a certain length.

The rotating handle 31 is formed at the rear end of the rotating body 30, and the rear surface is hit by a medical hammer to rotate the intervertebral insert 4.

The rotating means 32 is formed at the front end of the rotating body 30, and is formed to have a certain area so as to contact the intervertebral insert 4.

The intervertebral insert rotation mechanism 3 contacts the upper edge of the inclined intervertebral insert 4 and transmits force from the upper side to the lower intervertebral insert 4 using a medical hammer or the like. Accordingly, as shown in FIG. 20 , the intervertebral insert 4 receives force from the intervertebral insert rotation mechanism 3 and rotates so that the position inside the intervertebral body can be adjusted.

At this time, the intervertebral insert 4 first enters the intervertebral body and has a gently formed bottom edge 46 that comes into contact with the inside of the intervertebral body, so that it can be easily rotated when rotated by the impact of the intervertebral insert rotating mechanism 3.

Also, in the intervertebral insert rotating mechanism 3 , the rotating means 32 may include a rotating protrusion 320 .

The rotating protrusion 320 protrudes from the front of the rotating means 32, and has a sharp end, so that it is inserted into the rear side of the intervertebral insert 4 and the position of the intervertebral insert 4 inside the intervertebral body can be adjusted in a state of temporary coupling.

Specifically, the intervertebral insert 4 may be excessively rotated as shown in FIG. At this time, the rotation protrusion 320 may be inserted into the rear side of the intervertebral insert 4 . Then, as shown in (b) of FIG. 21, the rotating protrusion 320 is lifted upward while temporarily coupled to the intervertebral insert 4, and the medical staff can adjust the intervertebral insert 4 to be positioned in the forward direction desired by the medical staff.

In addition, it is preferable that the rotating protrusion 320 has protrusions formed in a spiral shape on the outer circumferential surface so that temporary coupling is well achieved and coupling with the intervertebral insert 4 is released when turned in the reverse direction, but is not limited thereto.

Referring to FIGS. 22 to 25 , the intervertebral insert rotating mechanism 3 may further include a striking portion 33 for minutely rotating the intervertebral insert 4 .

The striking portion 33 may include a rotation handle groove 330 and a striking protrusion 3310.

The rotating handle groove 330 is formed inwardly on the rear surface of the rotating handle 31, and a bent portion 3300 may be formed continuously along the longitudinal direction of the inner circumferential surface. The rotation handle groove 330 is preferably formed in a pair at a position facing each other, but is not limited thereto.

The striking member 331 is formed to be inserted into the rotation handle groove 330, and a striking protrusion 3310 inserted into the bent portion 3300 may be formed on an outer surface thereof. The hitting protrusion 3310 may be formed at a position corresponding to the rotation handle groove 330 .

The impact member 331 is hit on the rear surface by a medical hammer so that the impact protrusion 3310 moves downward along the bent portion 3300 and at the same time transmits some impact force to the rotating means 32 so that the intervertebral insert 4 can be rotated minutely.

Specifically, as shown in (a) of FIG. 25, the intervertebral insert rotating mechanism 3 may come into contact with the end of the upper edge of the intervertebral insert 4 inserted into the intervertebral body. Then, when the rear surface of the striking member 331 is hit, as shown in (b) of FIG. 25, the striking member 331 is inserted forward along the bent portion 3300 of the rotation handle groove 330, and the intervertebral insert 4 can move slowly downward. Finally, as shown in (c) of FIG. 25, the impact member 331 is hit multiple times so that the medical staff can place the intervertebral insert 4 at a desired position.

That is, the impact unit 33 not only prevents the position of the intervertebral implant 4 from being erroneously adjusted due to excessive impact force being transferred to the intervertebral implant 4, but also has the advantage of being able to adjust the position of the intervertebral implant 4 without impacting the spine.

Although the embodiments of the present invention have been described with reference to the accompanying drawings, those skilled in the art to which the present invention pertains may be implemented in other specific forms without changing the technical spirit or essential features of the present invention. It will be understood that it can be implemented. Therefore, the embodiments described above are illustrative in all respects and are not restrictive.

1: Intervertebral disc removal mechanism
10: removal body
11: removal handle
12: removal means
120: removal hole
13: auxiliary removal unit
130: auxiliary operation unit
131: top groove
132: inner groove
133: removal body plate
1330: spring
2: Intervertebral insert insertion instrument
20: fixed part
200: fixed body
201: fixed protrusion
21: insertion handle
210: handle fastening ring
22: insertion control unit
220: control body
221: control handle
222: coupling protrusion
223: extension bar
23: bracket part
230: operation hall
3: intervertebral insert rotating mechanism
30: rotating body
31: rotation knob
32: rotation means
320: rotation protrusion
33: hitting part
330: rotation handle groove
3300: bend
331: striking member
3310: hitting protrusion
4: intervertebral insert
40: insertion part
41: body part
410: protrusion
411: reception hall
4110: locking groove
412: insertion groove
43: bone transplant filling hole
44: bone transplantation hall
45: coupling part
450: coupling hole
451: fixed groove
46: bottom edge
47: extension
470: extension bar
4700: catching means
4701: spring
471: insertion rod
472: extension head
4720: charging protrusion
S: vertebrae

Claims (10)

In interbody fusion surgery in which an intervertebral insert is inserted into the intervertebral body, which is the space between the vertebrae, so that the spine functions normally,
an intervertebral disc removal mechanism for removing the intervertebral disc inside the intervertebral body in order to insert the intervertebral insert;
An intervertebral insert inserting device for inserting the intervertebral insert into the intervertebral body, and
A set of medical instruments for implanting an intervertebral insert including a rotating mechanism for moving the intervertebral insert inside the intervertebral body so that the intervertebral insert is positioned at a point desired by a medical staff.
According to claim 1,
The intervertebral disc removal mechanism,
A removal body with a middle part bent upward so that only one vertebra joint can be inserted between the incised vertebrae and reach the opposite intervertebral disc;
A removal handle formed to be connected to the rear of the removal body, and
A medical instrument set for implanting an intervertebral insert including a removal means formed at the front end of the removal body and provided with a removal hole in a lateral direction to detach and scrape the intervertebral disc.
According to claim 2,
The intervertebral disc removal mechanism,
Further comprising an auxiliary removal unit for easily peeling and scraping the intervertebral disc by moving the removal body accommodated inside the removal handle in the forward and backward directions,
The auxiliary removal unit,
an upper surface groove formed on the upper surface of the removal handle to have a predetermined length along the longitudinal direction;
an auxiliary manipulation unit formed on the rear side of the removal body, accommodated in the upper surface groove and protruding outward, and moving forward and backward along the upper surface groove;
An inner groove formed on the inside of the removal handle to have a certain length along the longitudinal direction and having a connection hole on the front side so that the removal body can pass through; and
A medical instrument set for implanting an intervertebral insert including a removal body plate formed at the rear end of the removal body, accommodated in the upper surface groove, moving forward and backward, provided with a spring, moving rearward by manipulation of the auxiliary manipulation unit, and then returning forward by the spring.
According to claim 3,
The auxiliary removal unit,
A medical instrument set for implanting an intervertebral insert further comprising a fine removal groove formed on a side surface of the upper surface groove and allowing the auxiliary manipulation unit to be inserted and moved in a lateral direction.
According to claim 1,
The intervertebral insert insertion device,
A fixing part formed in a tubular shape;
Doedoe connected to the fixing portion, the insertion handle formed in the vertical direction so that the hand can be gripped without breaking;
An insertion operation unit accommodated inside the fixing unit and formed to be rotatable; and
A medical instrument set for implanting an intervertebral insert including a bracket portion formed on the rear side of the fixing portion and the insertion manipulation portion.
According to claim 5,
The fixing part,
A fixed body formed in a tubular shape and containing an insertion operation unit therein, and
A medical instrument set for implanting an intervertebral insert including a pair of fixing protrusions spaced apart from the fixing body hole formed at the front end of the fixing body at a predetermined distance in the upper and lower directions and having a certain length outward.
According to claim 5,
The insertion operation unit,
an operating body accommodated inside the fixed body, rotated in a circular bar shape in cross section, and formed to be longer than the fixed body;
A manipulation handle formed at the rear end of the manipulation body and having a larger diameter than the diameter of the manipulation body; and
A medical instrument set for implanting an intervertebral insert including a coupling protrusion formed on an outer circumferential surface of the front end of the manipulation body and having a screw thread capable of screwing with the intervertebral insert.
According to claim 1,
The intervertebral insert rotating mechanism,
A rotating body formed in a bar shape;
A rotation handle formed at the rear end of the rotating body and rotating the intervertebral insert by hitting the rear surface with a medical hammer; and
A medical instrument set for implanting an intervertebral insert including a rotating means formed at a front end of the rotating body and having a predetermined area to contact the intervertebral insert.
According to claim 8,
The intervertebral insert rotating mechanism,
Further comprising a striking portion for finely rotating the intervertebral insert,
the striking part,
Doedoe formed on the inside of the rear surface of the rotation handle, the rotation handle groove formed with a bent portion continuously along the longitudinal direction of the inner circumferential surface, and
A medical instrument set for implanting an intervertebral insert including a striking member formed to be inserted into the rotation handle groove and having a striking protrusion inserted into the bent portion on an outer surface thereof.
According to claim 8,
The rotating means,
A set of medical instruments for implanting an intervertebral insert including a rotational protrusion protruding from the front and having a sharp end and being inserted into the rear side of the intervertebral insert to adjust the position of the intervertebral insert inside the intervertebral body in a temporarily coupled state.

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