KR102192022B1 - Lumbar Intervertebral expandable cage and the method of the Lumbar Intervertebral expandable cage insertion - Google Patents

Abstract

The present invention can provide an expandable cage for the spine, comprising: an upper member; a lower member; a sagittal adjustment unit for adjusting the sagittal balance of the spine; and a coronal adjustment unit for adjusting the coronal balance of the spine. According to the description herein, since not only the sagittal balance of the spine but also the coronal balance thereof can be adjusted at the same time, effective treatment of the spine with complex deformation is possible.

Description

{Lumbar Intervertebral expandable cage and the method of the Lumbar Intervertebral expandable cage insertion}

The present invention relates to an expandable cage for the spine and a method of inserting an expandable cage using the same, and more particularly, to a spine that recovers spinal function by securing a gap between vertebral bodies by replacing damaged disks between the vertebrae in order to treat spinal disk-related diseases. It relates to an expandable cage and a method for inserting the same.

In general, the disk existing between the vertebral bones and the bones absorbs the load and impact of the body between the vertebral bones except for a part of the cervical spine, and acts as a buffer to distribute the shock like a spring, as well as the vertebral bones. It holds the vertebral nerves so that they are not dislodged, separates the two vertebral bones so that the spinal nerves are not compressed, smoothes the range of the vertebral joints, and smoothes the movement of each vertebral bone.

On the other hand, such a disc may cause various side effects such as vertebral deformity as the spacing of the vertebrae gradually narrows or when the vertebral bones settle down when an external artificial factor, degenerative, or abnormal posture persists for a long time.

Therefore, as a method of treating diseases accompanying such discs, after removing the damaged intervertebral disc, fusion is performed to replace the disc by inserting an implant, a so-called cage, in the space between two adjacent vertebral bones. ) Is used, and the cage at this time plays a role in restoring spinal function by allowing the original distance between the vertebral bodies to be restored.

As an example of a technique for such a cage, Korean Patent Publication No. 10-1352820 discloses an upper support part for supporting a vertebral body located above the vertebral bodies, a lower support part for supporting a vertebral body located below the vertebral bodies, and an upper support and lower support. A cage body including a connection portion connecting the ends of the branches to each other; And a sliding member that slides between the upper support part and the lower support part to widen or narrow the gap between the upper support part and the lower support part, wherein the sliding member is screwed to the sliding member to slide the sliding member by screwing. There has been disclosed a vertebral interbody expansion cage, characterized in that it further comprises a pressure bolt.

On the other hand, in practice, spinal deformities do not appear alone, such as scoliosis and kyphosis, but are three-dimensionally deformed and are mainly complex deformations accompanied by scoliosis and kyphosis.

However, since the conventional expansion cage for the spine is configured to control only one of the sagittal balance of the spine or the coronal balance of the spine, when it is assumed that most of the deformation of the spine is made complex. Such a conventional cage has a limitation in its therapeutic effect, and there is a problem in that it is limited in treating a spine having a complex deformation. In addition, since the conventional expansion cage for the spine has a risk factor that may damage the muscles or ligaments of the human body when inserted as much as it is inserted from the back of the spine, there is a problem that the burden on treatment increases.

Korean Patent Publication No. 10-1352820

An object of the present invention is to provide an expandable cage for the spine and a method for inserting the same, which is configured to control not only the sagittal balance of the spine but also the coronal balance at the same time, enabling effective treatment of the spine having a complex deformation with only one expandable cage. .

In addition, since the present invention inserts the expandable cage for the spine from the side of the spine (lateral approach, trans-psoas approach) or an anterolateral approach (ante-psoas approach), muscles or ligaments for posterior or posterior access An object of the present invention is to provide an expandable cage for the spine and an insertion method thereof that can escape from pain occurring after surgery by incision.

According to an aspect of the present invention, the present invention includes an upper member; A lower member spaced apart from the lower part of the upper member; A sagittal adjustment unit positioned between the upper member and the lower member, and adjusting a sagittal balance of the spine by adjusting a separation distance between the upper member and the lower member; It is located between the upper and lower members and is coupled to one side of each of the upper and lower members, and by adjusting the inclination of the upper and lower members by raising and lowering each side of the upper and lower members, the coronal balance of the spine (coronal balance) It is possible to provide an expandable cage for the spine comprising a; coronal control unit for adjusting the balance).

The sagittal adjustment unit includes a height adjustment screw disposed along a longitudinal direction of an upper member and a lower part, a screw thread formed on an outer circumferential surface, and an adjustment mechanism inserted therethrough to rotate in association with the rotation of the adjustment mechanism; It is screwed with the height adjusting screw to move according to the rotation of the height adjusting screw, and the upper part is in contact with the lower surface of the upper member and the lower part is in contact with the upper surface of the lower member to adjust the separation distance between the upper member and the lower member according to the movement. A height adjustment member; One side is connected to the height adjustment member, the other side is connected to each of the upper member and the lower member, it may be configured to include a support connection for supporting the height adjustment member.

The height adjustment member is moved by the rotation of the height adjustment screw by screwing the height adjustment screw through the screwing hole, and the upper member is in contact with the lower surface of the upper member and the lower part is in contact with the upper surface of the lower member. And an adjusting part for elevating and lowering the lower member, a support part positioned on the other side of the upper member and the lower member to support the upper member and the lower member, and a connection part connecting the adjusting part and the support part.

The adjusting unit is formed in an inclined manner and contacts the upper inclined surface formed on the lower surface of the upper member, and when moving, the first sliding surface that slides along the upper inclined surface, and the lower inclined surface formed inclinedly and formed on the upper surface of the lower member, and the upper part when moving. It is formed including a second sliding surface that slides along an inclined surface, and reduces the separation distance between the upper member and the lower member by raising and lowering the upper member and the lower member along the first and second sliding surfaces according to the movement. It can be configured to allow or expand.

The adjusting unit may be formed such that the first sliding surface and the second sliding surface each have the same inclination angle with respect to the moving direction.

The adjustment unit is formed so that the first and second sliding surfaces are symmetrically positioned with each other in the vertical direction, and becomes narrower toward the inner side of the upper member and the lower member, and the separation distance between the upper member and the lower member increases as it moves inward. It can be configured to let.

The upper member has a first inclined surface formed on the lower surface of the other end so as to incline upward toward the outside, and the lower member has a second inclined surface inclined downward toward the outside on the upper surface of the other end opposite to the first inclined surface, The support part may be configured to form a first sloped support surface facing the first sloped surface and a second sloped support surface facing the second sloped surface.

The support may be inserted through an adjustment mechanism, and an insertion hole coaxial with the screwing hole may be formed.

The support connection part includes a connection shaft coupled to the support, one side rotatably coupled to the connection shaft, the other side rotatably coupled to the upper member, and one side rotatably coupled to the connection shaft, and the other side It may be configured to include a second support link rotatably coupled to the lower member.

The upper member may have a rectangular planar shape, and may have an upper surface inclined downward from anterior to posterior of the spine with respect to the sagittal plane of the spine.

The lower member may be formed in a rectangular shape such that the planar shape corresponds to the planar shape of the upper member, and the lower surface thereof may be formed to be inclined downward from the front to the rear of the spine with respect to the sagittal plane of the spine.

The tubular adjustment unit is arranged along the longitudinal direction of the upper member and the lower member, a thread is formed on the outer circumferential surface, and an adjustment mechanism is inserted through the inside to rotate in conjunction with the rotation of the adjustment mechanism, and the inner circumferential surface in a tubular shape. A thread is formed in the inclination adjustment screw is screwed into the inside, and a moving member that moves according to the rotation of the inclination adjusting screw, one side is connected to the moving member, the other side is connected to each of the upper and lower members, and the moving member It may be configured to include an inclination adjustment unit for elevating one side of the upper member and the lower member according to the movement of.

The inclination adjustment unit includes a rotating shaft coupled to the moving pipe, one side rotatably coupled to the rotating shaft and the other side rotatably coupled to one side of the upper member, and the other side rotatably coupled to the rotating shaft. It may be configured to include a lower link coupled to one side.

It is located between the upper member and the lower member, the end of the height adjustment screw positioned opposite to each other and the seating portion in which the end of the inclination adjustment screw is seated is formed to further include a guide unit for guiding the height adjustment screw and the inclination adjustment screw. I can.

The height adjustment screw is rotated by the rotation of the adjustment mechanism by inserting the adjustment mechanism into the inside, and a first adjustment hole having a polygonal cross-sectional shape is formed, and the tilt adjustment screw is inserted into the adjustment mechanism to rotate the adjustment mechanism. It is rotated by, and a second control hole having the same diameter and cross-sectional shape as the first control hole may be formed.

The height adjustment screw and the inclination adjustment screw are arranged to be aligned with each other, so that the first adjustment hole and the second adjustment hole are coaxially arranged, and the adjustment mechanism is at least one of the height adjustment screw and the inclination adjustment screw according to the insertion depth. It can be configured to be able to rotate any one.

According to another aspect of the present invention, the present invention provides an upper member, a lower member spaced apart from the lower part of the upper member, and located between the upper member and the lower member, by adjusting the separation distance between the upper member and the lower member. A sagittal adjustment unit that adjusts the sagittal balance of the spine, and a coronal control unit that is located between the upper and lower members and adjusts the inclination of the upper and lower members to adjust the coronal balance of the spine. Inserting an expandable cage for the spine, including the implantation space; Adjusting the sagittal balance of the spine by extending the separation distance between the upper member and the lower member with respect to the sagittal plane of the spine through the sagittal control unit; It provides a method of inserting an expandable cage for a spine comprising the step of adjusting the coronal balance of the spine by extending one side of the upper member and the lower member to be inclined with respect to the coronal surface of the spine through a coronal control unit. .

The step of inserting the expandable cage for the spine into the implantation space may be performed by inserting the expandable cage for the spine in a lateral position or an anterolateral position of the spine.

The thalamus control unit and the coronal control unit are arranged to be coaxially aligned with each other and are configured to adjust the sagittal balance and the coronal balance of the spine respectively by a height adjustment screw and an inclination adjustment screw rotating by an adjustment mechanism, and the sagittal balance The step of adjusting the coronal balance includes inserting the adjusting device with one side height adjusting screw of the expandable cage for the spine, or inserting the adjusting device with the other side tilt adjusting screw of the expandable cage for the spine, and inserting the adjusting device for the expandable cage for the spine. The sagittal balance and coronal balance can be adjusted by rotating at least one of the height adjustment screw and the inclination adjustment screw according to the depth.

The expandable cage for the spine is formed so that the height of one side with respect to the sagittal plane of the spine is higher than the height of the other side, and the upper surface of the upper member and the lower surface of the lower member are formed to be inclined with respect to the sagittal plane of the spine. In the step of inserting into the implantation space, one side of the expandable cage for the spine may be positioned toward the front of the spine to be inserted into the implantation space.

The expandable cage for the spine and the insertion method thereof according to the present invention can provide the following effects.

First, since the thalamus control unit and the coronal control unit can control not only the sagittal balance of the spine, but also the coronal balance of the spine, it is possible to treat scoliosis or kyphosis, as well as effectively treat complex deformation of the spine with one configuration. Do.

Second, since it is inserted in the lateral position or anterolateral position of the spine, it is possible to avoid the risk of damage to the muscles or ligaments of the human body that may occur during surgery, thus enabling a safer operation, and lateral lumbar fusion surgery. (LLIF, lateral lumbar interbody fusion) as well as Antero-psoas (Anterolateral) Interbody Fusion) are possible.

Third, since it is configured so that the user can easily operate the thalamus control unit and the coronal control unit through a single control mechanism, it is possible to facilitate the work of adjusting the sagittal balance and the coronal balance.

Fourth, since the front and rear sides are formed to be symmetrical with respect to the longitudinal direction (insertion direction), when adjusting the coronal balance through the coronal control unit, it is easily extended by changing the anteroposterior direction according to the extension position with respect to the left or right side of the spine. The location can be changed, and the incision can be minimized.

Fifth, it is configured to adjust the sagittal balance and coronal balance according to the thread pitch by rotating the height adjustment screw of the sagittal adjustment unit and the inclination adjustment screw of the coronal adjustment unit, and fine expansion adjustment according to the thread pitch is possible to respond to the condition of the spine. By doing so, the optimal treatment can be obtained, and the usability can be improved because it is adjusted only by the rotation of the height adjustment screw and the inclination adjustment screw.

1 is a view showing a state in which an expandable cage for a spine according to an embodiment of the present invention is inserted into a spine with respect to the sagittal plane of the spine.
2 is a view showing a state in which an expandable cage for a spine according to an embodiment of the present invention is inserted into the spine with respect to the coronal surface of the spine.
3 is an exploded perspective view of an expandable cage for a spine according to an embodiment of the present invention.
4 is a front view showing an expandable cage for a spine according to an embodiment of the present invention.
5 is a perspective view showing the expandable cage for the spine of FIG. 4.
6 is a side view showing the expandable cage for the spine of FIG. 4.
7 is a front view showing a state in which an expandable cage for a spine according to an embodiment of the present invention is expanded in a vertical direction by a thalamus control unit.
FIG. 8 is a side view of an expandable cage for the spine in an expanded state by the thalamus control unit of FIG. 7.
FIG. 9 is a front view showing a state in which the expandable cage for the spine of FIG. 7 extends one side in a vertical direction by a coronal control unit.
10 is a perspective view showing the expandable cage for the spine of FIG. 9.
11 is a perspective view showing a guide unit in the expandable cage for the spine of FIG. 3.
12 is a plan view showing a method of inserting an expandable cage for a spine according to an embodiment of the present invention.
13 to 18 are diagrams showing a process of performing the thalamus control and coronary control of the spine by inserting an adjusting device into the thalamus control unit in the extended cage for the spine according to an embodiment of the present invention.
19 to 23 are diagrams showing a process of performing the thalamus control and coronal control of the spine by using the control mechanism with the coronary control unit in the extended cage for the spine according to an embodiment of the present invention.

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

The terms used in the present invention have been selected from general terms that are currently widely used while considering functions in the present invention, but this may vary depending on the intention or precedent of a technician working in the field, the emergence of new technologies, and the like. In addition, in certain cases, there are terms arbitrarily selected by the applicant, and in this case, the meaning of the terms will be described in detail in the description of the corresponding invention. Therefore, the terms used in the present invention should be defined based on the meaning of the term and the overall contents of the present invention, not a simple name of the term. When a part of the specification is said to "include" a certain component, it means that other components may be further included rather than excluding other components unless otherwise stated. In addition, terms such as "... unit" and "unit" described in the specification mean a unit that processes at least one function or operation, and throughout the specification, "user" refers to a medical professional, a doctor, a clinical pathologist, or a radiologist. It can be not only hospital officials, but also emergency medical technicians handling medical devices. It is not limited thereto. “Subject” may include animals in need of treatment as well as animals for veterinary use.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those of ordinary skill in the art can easily implement the present invention. However, the present invention may be implemented in various different forms and is not limited to the embodiments described herein. In the drawings, parts irrelevant to the description are omitted in order to clearly describe the present invention, and similar reference numerals are assigned to similar parts throughout the specification.

First, the expandable cage for the spine according to an embodiment of the present invention (600, hereinafter referred to as'expandable cage') removes the disk when it is damaged, and instead of the removed disk, the upper vertebrae 1 and the lower vertebrae ( 2) It is inserted into the inter-transplant space and is configured to secure the intervertebral spacing. Above all, it is possible to control the sagittal balance of the spine as well as the coronal balance of the spine at the same time. It is composed so that effective treatment is possible for complex deformities of the spine.

Hereinafter, an expandable cage according to an embodiment of the present invention will be described with reference to the drawings.

1 shows a state in which an expandable cage 600 according to an embodiment of the present invention is inserted with respect to the sagittal plane of the spine. Referring to the drawings, the expandable cage 600 of the present invention may be configured to be extended in a direction (up-down direction) perpendicular to the sagittal plane of the spine as shown to adjust the sagittal balance of the spine.

2 shows a state in which the expandable cage 600 is inserted with respect to the coronal plane of the spine. Referring to the drawings, the expandable cage 600 of the present invention extends in a direction perpendicular to the sagittal plane of the spine, as well as a direction in which one side (left in the figure) is vertical with respect to the coronal surface of the spine as shown ( It can be configured to extend in the vertical direction) to control the coronal balance of the spine. Here, in the drawing, the expandable cage 600 is shown in an extended state with respect to the left side of the spine, but this is, in an embodiment, extended with respect to the other side (right side in the drawing) and selectively with respect to the left and right sides of the spine. Of course it is extensible.

Hereinafter, the expandable cage 600 of the present invention capable of adjusting the sagittal balance and the coronal balance will be described in detail with reference to FIGS. 3 to 10.

First, Figure 3 is an exploded perspective view showing the configuration of the expandable cage 600 of the present invention. 4 to 6 are views showing the expandable cage 600 in an unexpanded state, and FIGS. 7 to 10 are views showing the expandable cage 600 in an expanded state.

3 to 6, the expandable cage 600 of the present invention includes an upper member 100, a lower member 200, a thalamus control unit 300, and a tubular control unit 400 Can be configured.

First, the upper member 100 may have a rectangular planar shape and a plate shape having a set thickness (height) in consideration of the implanted space, disk shape and size to be inserted. Preferably, the upper member 100 may be formed in a shape ranging from 18mm to 22mm in width, 45mm to 55mm in length, and 8mm to 16mm in height, but this is a preferred size in consideration of the average transplant space when the subject is an adult. Not limited.

On the other hand, the upper member 100, the upper part is fixed to the upper spine (1). To this end, the upper member 100 may have a flat upper surface, and although not shown, may be fixed to the upper vertebrae 1 through a fixing means.

Here, the fixing means is a wedge-type fixing protrusion (spike) protruding from the upper surface of the upper member 100 in order to be fixed with the upper spine bone 1 or a porous surface to facilitate bone growth. bone growth) or fixing pins. In addition, the fixing means is formed integrally with the upper member 100 so that the upper member 100 can be manufactured as a single product, etc. If the upper member 100 and the upper spine 1 can be fixed to each other Various configurations are applicable.

The lower member 200 is formed in a rectangular shape such that the planar shape corresponds to the planar shape of the upper member 100, and may be formed in a plate shape having a set thickness (height). The lower member 200 may be formed in a shape ranging from 18mm to 22mm in width, 45mm to 55mm in length, and 8mm to 16mm in height so as to correspond to the upper member 100, but is not limited thereto.

The lower member 200 may be spaced apart from the upper member 100 and may have a flat lower surface, and the lower part may be fixed to the lower vertebrae 2 through the above-described fixing means.

Meanwhile, the upper member 100 and the lower member 200 connected to each other are preferably formed in a wedge shape with respect to a sagittal plane.

Looking at this, first, looking at the spine of a normal person from the side (sagittal plane), the cervical spine is bent forward (Cervical lordosis), and the thoracic spine is bent backward ( Thoracic kyphosis), the lumbar spine is also anteriorly curved (Lumbar lordosis), often having an S-shaped curved shape.

Meanwhile, the human spine consists of 26 bones, and the lumbar spine is made up of 5 bones, and there are 5 discs that absorb shocks between each vertebrae. At this time, each disk is pressed in a form that makes the lumbar spine bent forward. In particular, in the case of the lumbar spine, since the center of gravity is concentrated in the rear, more load acts on the rear and is pressed in a wedge shape. The corresponding shape will have a wedge shape.

Therefore, the expandable cage 600 of the present invention is preferably formed in a wedge shape with respect to the sagittal plane so as to correspond to such a disk shape.

Accordingly, the upper member 100 may be formed such that the upper surface is inclined downward from the front to the rear of the spine with respect to the sagittal plane of the spine. In addition, the lower member 200 may be formed such that its lower surface is inclined upward from the front to the rear of the spine with respect to the sagittal plane of the spine.

Further, the upper surface of the upper member 100 and the lower surface of the lower member 200 may be formed to be symmetrical with respect to a horizontal plane, and each inclination with respect to the horizontal plane may be formed at the same angle in the range of 8° to 10°. I can.

This is, given that the angle of the spine of normal people when viewed from the side is in the range of 20° to 40° for the cervical and thoracic vertebrae, and in the range of 30° to 50° for the lumbar vertebrae (including sacrum 1). Therefore, when the wedge angles of five discs are combined to form 30° to 50°, the disc angle for one node can be 8° to 10°. In other words, the five disks of the lumbar vertebrae do not all form the same angle, but the angles of each disk are almost the same except for the lowermost disk, and because of this, the five disks gathered together in the range of 30° to 50°. Assuming to form an angle, the angle of one disk can range from 8° to 10°.

The upper member 100 may have a first inclined surface 120 formed on a lower surface of the other end thereof so as to incline upward toward the outside. In addition, the lower member 200 may have a second inclined surface 220 inclined downward toward the outside on an upper surface of the other end opposite to the first inclined surface 120. Here, the first inclined surface 120 and the second inclined surface 220 are formed to correspond to the shapes of the first inclined support surface 324 and the second inclined support surface 325 of the support part 323 to be described later, and the support part 323 It is configured to reduce interference due to movement of the device.

The expandable cage 600 is formed in a rectangular parallelepiped shape so that the front and rear sides are symmetrical with respect to the insertion direction, and the expansion position for adjusting the coronal balance can be changed by changing the front and rear directions when inserted. That is, the expandable cage 600 can extend the left and right sides of the spine only by changing the direction, thereby minimizing the incision.

The expandable cage 600 has an upper through hole 130 of a long hole through the upper member 100 so that effective bone fusion between the upper vertebrae 1 and the lower vertebrae 2 is achieved after insertion, and the lower member ( In 200), a long-hole lower through hole 230 may be formed. Here, it goes without saying that the size, shape and position of the upper through hole 130 and the lower through hole 230 can be variously designed.

Expandable cage 600 is a metal material that is harmless to the human body and can withstand the impact and load applied to the spine for a long period of time, any selected among metal materials such as titanium, carbon alloy material, ceramic material, or plastic (PEEK, Polyether Ether Ketone) material. It goes without saying that a variety of materials can be applied as long as the above object can be achieved, such as each component can be formed of the same material or different materials according to the function of each component.

In the following, the thalamus control unit 300 will be described.

3, 7 to 10, the thalamus control unit 300 serves to adjust the sagittal balance of the spine, and the sagittal balance at this time is on the sagittal plane of the spine (when viewed from sideways). ) It refers to adjusting the sagittal curve of the spine so that the spine has an ideal curve.

The thalamus control unit 300 is positioned between the upper member 100 and the lower member 200 and is configured to adjust the separation distance between the upper member 100 and the lower member 200, and in detail, the upper member ( 100) and the lower member 200 are configured to be parallel to each other and increase the separation distance therebetween to adjust the sagittal balance of the spine.

The sagittal adjustment unit 300 may include a height adjustment screw 310, a height adjustment member 320, and a support connection part 330.

First, looking at the height adjustment screw 310, the height adjustment screw 310 is located between the upper member 100 and the lower member 200, as shown, the upper member 100 and the lower member 200 It is arranged in the horizontal direction along the length direction of ).

The height adjustment screw 310 has a tubular shape and a screw thread is formed on the outer circumferential surface, and the first adjustment hole 311 is formed to penetrate into the first adjustment hole 311, so that the adjustment mechanism 10 (see FIG. 12) is It is inserted through.

The height adjustment screw 310 may have a polygonal cross-sectional shape of the first adjustment hole 311 so as to rotate in conjunction with the rotation of the adjustment mechanism 10 inserted therein. In the drawing, the first adjustment hole 311 has a hexagonal cross-sectional shape, and the adjustment mechanism 10 may be applied corresponding to the cross-sectional shape of the first adjustment hole 311.

Here, the adjustment mechanism 10 is formed with a set length and has a hexagonal head portion 11 having a hexagonal cross-sectional shape corresponding to the cross-sectional shape of the first adjustment hole 311, and connected to the hexagonal head portion 11 and circular It may be configured to include a cylindrical rod portion 12 having a cross-sectional diameter smaller than the cross-sectional diameter of the hexagonal head portion and a handle portion 13 that can be gripped by a user (see FIG. 13). At this time, the hexagonal head 11 is preferably formed to have a length in the range of 8mm to 12mm in consideration of the depth inserted into the first adjustment hole 311, but is not limited thereto, and the tilt adjustment screw 410 to be described later The length can be variously set in consideration of simultaneously rotating the height adjustment screw 310 and the inclination adjustment screw 410 by being inserted into the second adjustment hole 411 and the first adjustment hole 311 at the same time.

As for the height adjustment screw 310, the movement distance of the height adjustment member 320 is determined according to the thread pitch as much as it moves the height adjustment member 320 according to rotation, and the movement distance at this time is the upper member 100 and the lower member It determines the separation distance between (200). Therefore, the height adjustment screw 310 may have a pitch of the screw thread set according to the distance adjustment range of the upper member 100 and the lower member 200. Further, since the height adjustment screw 310 supports and maintains the spaced position between the upper member 100 and the lower member 200 by the screw fastening force with the height adjustment member 320, the pitch of the thread in consideration of this fastening force And various shapes can be set.

Hereinafter, the height adjustment member 320 will be described.

The height adjustment member 320 is screwed with the height adjustment screw 310 and is configured to reciprocate along the height adjustment screw 310 according to the rotation of the height adjustment screw 310, and the upper member 100 according to the movement By increasing the separation distance between the and the lower member 200, serves to expand the expandable cage 600 in the vertical direction on the sagittal plane.

In detail, the height adjustment member 320 is configured such that the upper part is in contact with the lower surface of the upper member 100 and the lower part is in contact with the upper surface of the lower member 200, and the upper member 100 along the tapered sliding surface when moving. ) And the lower member 200 is configured to move up and down.

The height adjustment member 320 may be configured to include an adjustment part 321, a support part 323, and a connection part 322.

The adjustment unit 321 is screwed with the height adjustment screw 310 through the screwing hole 3213 and is configured to move by the rotation of the height adjustment screw 310. This, while the height adjustment screw 310 is constrained so that its position is fixed by the guide unit 500, the adjustment unit 321 is configured to be movable, and is adjusted according to the rotation of the height adjustment screw 310 The unit 321 is moved.

On the other hand, the adjusting unit 321, the upper portion in contact with the lower surface of the upper member 100 and the lower portion in contact with the upper surface of the lower member 200, is in contact with the tapered sliding surface, along the sliding surface according to the movement. It may be configured to elevate the upper member 100 and the lower member 200 and thereby reduce or expand the separation distance between the upper member 100 and the lower member 200.

In detail, the adjustment unit 321 may have a first sliding surface 3211 and a second sliding surface 3212 formed thereon. The first sliding surface 3211 is formed to be inclined on an upper surface of one side of the adjustment unit 321 to contact the upper slope 110 formed on the lower surface of the upper member 100, and slide along the upper slope 110 when moving. It is configured to move in contact.

The second sliding surface 3212 is formed to be symmetrical in the vertical direction with the first sliding surface 3211, and is formed to be inclined on the lower surface of one side of the adjusting part 321 to form a lower inclined surface 210 formed on the upper surface of the lower member 200 It is in contact with and is configured to slide along the lower inclined surface 210 when moving.

On the other hand, the adjusting unit 321 is preferably formed so that the first sliding surface 3211 and the second sliding surface 3212 have the same inclination angle with respect to the moving direction. This is to facilitate the adjustment of the sagittal balance between the upper and lower vertebrae 2 by reducing and expanding the distance between the upper and lower members 100 and 200 symmetrically.

However, this is an exemplary embodiment, by varying the inclination angles of the first sliding surface 3211 and the second sliding surface 3212 so that the vertical separation ratio of the upper member 100 and the lower member 200 for the same thread pitch is reduced. You can do it differently. For example, by forming the inclination angle of the first sliding surface 3211 to be greater than the inclination angle of the second sliding surface 3212, the upper member 100 moves upwardly than the lower member 200 when the height adjustment screw 310 is rotated. It can be configured to increase the rate. Thus, when the expandable cage 600 is inserted into the implantation space, the same screw pitch due to the high enlargement ratio of the upper member 100 to screw rotation, even if it is located closer to the lower spine bone 2 rather than the center of the implantation space. With respect to, the contact timing of the upper vertebrae 1 and the lower vertebrae 2 may be the same.

The adjusting part 321 may be formed such that the first sliding surface 3211 and the second sliding surface 3212 are positioned symmetrically to each other in the vertical direction, and narrower toward the inside (left side in the drawing). In this case, the adjusting unit 321 may be configured to increase the height of the expandable cage 600 by increasing the separation distance between the upper member 100 and the lower member 200 as it moves inward.

The support part 323 is positioned on the other side of the upper member 100 and the lower member 200 and is configured to support the upper member 100 and the lower member 200.

In the drawing, the support part 323 is a first inclined surface 324 and a second inclined support surface 325 corresponding to the first inclined surface 120 of the upper member 100 and the second inclined surface 220 of the lower member 200. ) Is formed, and may be configured so that interference between the upper member 100 and the lower member 200 does not occur during movement.

Further, as shown in the support part 323, the first inclined support surface 324 and the second inclined support surface 325 are located at a set distance apart from the first inclined surface 120 and the first inclined surface 120, When the balance is adjusted, even if one side of the upper member 100 and the lower member 200 is expanded and inclined, it is preferably configured so that interference does not occur.

The support part 323 may be formed coaxially with the screwing hole 3213 and an insertion hole 3231 through which the adjusting mechanism 10 is inserted may be formed. At this time, the insertion hole 3231 is formed to have a diameter larger than the diameter of the adjustment mechanism 10, as shown, it is preferably configured to facilitate the insertion and rotation of the adjustment mechanism (10).

The connection part 322 is coupled with the adjustment part 321 on one side and the support 323 on the other side, and serves to connect the adjustment part 321 and the support 323. The connection part 322 may be formed integrally with the support part 323 and the adjustment part 321, and may be formed in a plate shape as shown.

The connection part 322 may have an insertion part 3221 formed therein so that the height adjustment screw 310 can be inserted in the central part. At this time, the insertion portion 3221 is preferably formed such that the width is larger than the diameter of the height adjustment screw 310 so that interference does not occur in the rotation of the height adjustment screw 310, and the above-described support part 323 It may be formed to have the same width as the diameter of the insertion hole 3231.

Hereinafter, the support connection part 330 will be described.

The support connecting portion 330 is connected to the height adjustment member 320 on one side, and the other side is connected to each of the upper member 100 and the lower member 200 to support the height adjustment member 320, and in detail, one side It is connected to the support 323 may be configured to support the outer end of the height adjustment member (320).

The support connection part 330 may include a connection shaft 331, a first support link 332, and a second support link 333.

First, the connecting shaft 331 is a pair, each of which forms coaxial with respect to the horizontal direction, and is fixedly coupled to both outer sides (front and rear in the drawing) of the support part 323.

The first support link 332 is rotatably coupled to the connection shaft 331 on one side and rotatably coupled to the upper member 100 on the other side. Here, the first support link 332 may be rotatably coupled to the upper member 100 on the other side by an upper pin 3321 coupled to the upper member 100.

The second support link 333 has one side rotatably coupled to the connection shaft 331 and the other side rotatably coupled to the lower member 200. In this case, the second support link 333 may be rotatably coupled to the lower member 200 by the other side of the lower pin 3331 coupled to the lower member 200.

Meanwhile, in the first support link 332 and the second support link 333, a pin insertion hole 334 to which the upper pin 3321 and the lower pin 3331 are coupled is formed as a long hole to move the support part 323 It may be formed to compensate for movement interference (moving distance), etc. that may occur during the event.

According to the above, when the height adjustment screw 310 is rotated, the height adjustment member 320 screwed with the height adjustment screw 310 moves inward along the height adjustment screw 310. When the height adjustment member 320 is moved inward, the separation distance between the upper member 100 and the lower member 200 increases by the adjustment unit 321, so that the expandable cage 600 is moved to the sagittal plane. Is expanded in the vertical direction.

In the following, the tubular control unit 400 will be described.

The coronal control unit 400 serves to adjust the coronal balance of the spine, and adjusts the coronal imbalance of the spine on the coronal surface of the spine (as viewed from the front) so that the spine has an ideal coronal balance. .

The tubular control unit 400 is located between the upper member 100 and the lower member 200, but is coupled to one side of each of the upper member 100 and the lower member 200, so that the upper member 100 and the lower member ( It is configured to adjust the coronal balance of the spine by elevating one side of the 200) and adjusting the inclination of the upper member 100 and the lower member 200 in the transverse direction (length direction) through this.

The tubular adjustment unit 400 may be configured to include a tilt adjustment screw 410, a moving member 420, and a tilt adjustment unit 430.

First, the inclination adjusting screw 410 is disposed in the horizontal direction between the upper member 100 and the lower member 200, a thread is formed on the outer circumferential surface in a tubular shape, and a second adjusting hole 411 is formed therein. , The adjustment mechanism 10 is inserted through the second adjustment hole 411, and may be configured to rotate in conjunction with the rotation of the adjustment mechanism 10.

The inclination adjustment screw 410 is formed so that the second adjustment hole 411 has the same diameter and cross-sectional shape as the first adjustment hole 311, and is arranged to be aligned with the height adjustment screw 310, It is preferable that the first control hole 311 and the second control hole 411 are disposed coaxially. This is configured so that the inclination adjustment screw 410 can be rotated by the same adjustment mechanism 10 that rotates the height adjustment screw 310, according to the insertion depth of the adjustment mechanism 10 when adjusting the sagittal balance and the coronal balance. This is because by allowing the tilt adjustment screw 410 and the height adjustment screw 310 to be rotated simultaneously or selectively, the sagittal balance and the coronal balance can be more easily adjusted.

On the other hand, in the configuration in which the inclination adjustment screw 410 and the height adjustment screw 310 are rotated by the rotation of the same adjustment mechanism 10 as described above, the height adjustment screw 310 and the inclination adjustment screw 410 are formed on the outer circumferential surface. The directions of the threads are preferably formed in opposite directions to each other. This is to allow the height adjustment member 320 and the moving member 420 to move symmetrically to each other with respect to the rotation of the adjustment mechanism 10 in one direction.

That is, the inclination adjustment screw 410 and the height adjustment screw 310 are each formed with a screw thread in a different direction and rotated in a different direction when rotated by the same adjustment screw, and a height adjustment member ( 320) and the moving member 420 may be configured to move symmetrically to each other in the inward and outward directions. Accordingly, even if the adjusting mechanism 10 rotates the inclination adjusting screw 410 and the height adjusting screw 310 at the same time, the height adjusting member 320 and the moving member 420 perform the same expansion or contraction operation.

The moving member 420 has a tubular shape and an inclination adjusting screw 410 is inserted therein. The moving member 420 is configured to reciprocate along the inclination adjusting screw 410 by the rotation of the inclined adjusting screw 410 and screwed to the inclination adjusting screw 410 by forming a thread on the inner circumferential surface.

The inclination adjustment unit 430 is connected to the moving member 420 on one side, and the other side is connected to each of the upper member 100 and the lower member 200 to support the inclination adjusting screw 410, and the moving member 420 ) Serves to expand one side of the expandable cage 600 by elevating one side of the upper member 100 and the lower member 200 according to the movement.

The inclination adjustment unit 430 may include a rotation shaft 431, an upper link 432, and a lower link 433.

First, the rotation shaft 431 is a pair, each of which forms coaxial with respect to the horizontal direction, and is fixedly coupled to both outer sides of the moving member 420, respectively.

The upper link 432 is rotatably coupled to one side of the rotation shaft 431 and the other side rotatably coupled to one side of the upper member 100.

The lower link 433 is rotatably coupled to one side of the rotation shaft 431 and the other side rotatably coupled to one side of the lower member 200.

According to the above, the tubular adjustment unit 400, when the inclination adjustment screw 410 rotates, the movable member 420 screwed with the inclination adjustment screw 410 is inwardly along the inclination adjustment screw 410 Then, when the moving member 420 moves inward, the distance between one side of the upper member 100 and the lower member 200 is increased by the inclination adjustment unit 430, and the expandable cage with respect to the tubular surface ( 600) will be expanded.

Meanwhile, the expandable cage 600 may be configured to further include a guide unit 500 positioned between the upper member 100 and the lower member 200. The guide unit 500 is configured to guide the height adjustment screw 310 and the inclination adjustment screw 410 by seating the ends of the height adjustment screws 310 and the inclination adjustment screws 410 positioned opposite to each other. .

In detail, the guide unit 500 may have a seating portion 510 on which ends of each of the height adjustment screw 310 and the inclination adjustment screw 410 are seated may be formed.

Referring to Figure 11, the seating portion 510, the height adjustment screw 310 and the inclination adjustment screw 410 is seated to support the position to be fixed, and the height adjustment screw 310 and the inclination adjustment screw 410 And is rotatably seated, accommodates the rotation of the height adjustment screw 310 and the inclination adjustment screw 410, but the positions are fixed.

Looking at the configuration for this, first, the height adjustment screw 310 is provided with a first flange 312 at an end seated on the guide unit 500, the inclination adjustment screw 410, the guide unit 500 A second flange 412 may be provided at an end to be seated.

Accordingly, the seating portion 510 may have a seating groove in which each of the first flange 312 and the second flange 412 is seated. Here, the seating groove includes a first flange groove 511 in which the first flange 312 is seated and rotatably fitted, and a second flange groove in which the second flange 412 is seated and rotatably fitted ( 512).

According to the above, the expandable cage 600 according to the embodiment of the present invention can control not only the sagittal balance but also the coronal balance with only one configuration, and can effectively treat the complex deformation of the spine with a minimum cage, The usability can be improved because the sagittal balance and coronal balance can be performed by simple operation of the user.

Hereinafter, a method of inserting the expandable cage 600 according to an embodiment of the present invention will be described. Here, since the expandable cage 600 is the same as the aforementioned expandable cage for the spine, a detailed description thereof will be omitted, and hereinafter, a method of inserting the expandable cage 600 will be described in detail.

First, the insertion of the expandable cage 600 of the present invention, as shown in Figure 12, in the lateral approach of the spine or the anterolateral approach of the spine, although not shown, the upper vertebrae 1 and the lower It is performed by inserting it into the grafting space between the vertebrae 2. Accordingly, the method of inserting the expandable cage 600 of the present invention, unlike the method of inserting the cage at the rear of the spine, can bypass the main blood vessels of the human body and escape from the risk of damage to the muscles or ligaments. Operation is possible.

On the other hand, the expandable cage 600 of the present invention, by inserting the adjustment mechanism 10 from one side with the height adjustment screw 310 and the other side with the inclination adjustment screw 410, that is, both sides, coronal adjustment and sagittal adjustment It has been described above that this is possible.

Thus, hereinafter, a method of performing coronal control and thalamus control by inserting the control mechanism 10 into the thalamus control unit 300 on one side, and inserting the control mechanism 10 into the coronal control unit 400 on the other side Let's look at how to perform control and thalamus control.

First, a method of performing coronary control and thalamus control by inserting the control mechanism 10 into the thalamus control unit 300 will be described.

First, insertion of the expandable cage 600 of the present invention may be performed by an insertion mechanism (not shown) to effectively perform such insertion, as it is a method of insertion from the side of the spine or from the anterolateral side. Such an insertion mechanism may include a director and a slide. Here, the director serves to expand and hold the space in which the expandable cage 600 is inserted by expanding the implantation space. In addition, the slide serves to cover the upper and lower portions of the expandable cage 600 into an implanted space enlarged by the director to insert.

Using the above-described insertion mechanism, the user inserts the expandable cage 600 in an unexpanded state into the implantation space.

At this time, the expandable cage 600, as described above, the upper surface of the upper member 100 and the lower surface of the lower member 200 so that the height of one side (anterior) with respect to the sagittal surface of the spine is higher than the height of the other side (rear). It has been described that this is formed to be inclined.

Accordingly, when inserting the expandable cage 600 into the implantation space, the user places one side of the expandable cage 600 having a high height toward the front of the spine and inserts it into the implantation space.

As described above, after inserting the expandable cage 600 into the implantation space, the sagittal balance and the coronal balance are adjusted according to the state of the spine of the subject.

First, the sagittal balance of the spine is adjusted by extending the separation distance between the upper member 100 and the lower member 200 with respect to the sagittal surface of the spine through the thalamus control unit 300.

To this end, the user first inserts the adjustment mechanism 10, as shown in Figs. 13 to 15, so that the hexagonal head 11 has the first adjustment hole 311 of the height adjustment screw 310 and the inclination adjustment Inserted to be coupled to the second adjustment hole 411 of the screw 410.

Then, the user rotates the adjustment mechanism 10 in this state, as shown in FIG. 16, and rotates the height adjustment screw 310 and the inclination adjustment screw 410 at the same time, so that the upper member 100 and the lower member Adjust the sagittal balance by extending the separation distance between (200).

On the other hand, at this time, it was shown that the user inserts the hexagonal head portion 11 of the adjustment mechanism 10 into both the first adjustment hole 311 and the second adjustment hole 411 in order to adjust the sagittal balance. In a preferred embodiment, it is also possible to adjust the sagittal balance by rotating the height adjustment screw 310 after inserting and coupling the hexagonal head 11 only to the first adjustment hole 311.

As described above, when the height adjustment screw 310 rotates the inclination adjustment screw 410 to reach the set extended range, the user stops rotating the adjustment mechanism 10 to complete the sagittal balance adjustment.

When the sagittal balance control is completed in this way, the user then adjusts the coronal balance of the spine by expanding one side of the upper member 100 and the lower member 200 to be inclined with respect to the coronal surface of the spine through the coronal control unit 400. do.

To this end, as shown in FIG. 17, the user moves the adjustment mechanism 10 further in the insertion direction to rotate only the inclination adjustment screw 410, so that the hexagonal head portion 11 is a second adjustment hole 411. It is inserted and coupled only, and in this state, by rotating the adjustment mechanism 10, the inclination adjustment screw 410 is rotated and expanded according to the set expansion range.

18 is a view showing a state in which only the tilt adjustment screw 410 is rotated by the user, and as shown, one side of the expandable cage 600 is expanded, and the coronal balance of the spine can be adjusted through this.

Next, a method of performing coronal adjustment and thalamus control by inserting the adjustment mechanism 10 into the coronal control unit 400 will be described with reference to FIGS. 19 to 23.

In this case, unlike the above, the user inserts the adjustment mechanism 10 in the direction of the tilt adjustment screw 410 as shown in FIGS. 19 and 20 so that the hexagonal head portion 11 is of the height adjustment screw 310. Insert so as to be coupled to the first adjustment hole 311 and the second adjustment hole 411 of the inclination adjustment screw 410.

Then, the user rotates the adjustment mechanism 10 in this state as shown in FIG. 21, and rotates the height adjustment screw 310 and the inclination adjustment screw 410 at the same time, so that the upper member 100 and the lower member Adjust the sagittal balance by extending the separation distance between (200).

When the sagittal balance adjustment is completed in this way, the user retracts the adjustment mechanism 10 in the opposite direction to the insertion direction as shown in FIG. 22 in order to adjust the coronal balance, so that the hexagonal head 11 becomes the second adjustment hole. Only the 411 is inserted and coupled, and then the adjustment mechanism 10 is rotated.

Then, as shown in FIG. 23, the expandable cage 600 is expanded so that one side is inclined so that the coronal balance of the spine can be adjusted.

According to the above, the user does not need to replace and reinsert the adjustment mechanism 10 in order to adjust the sagittal balance and the coronal balance, and adjust the height adjustment screw 310 and the inclination by only adjusting the insertion depth of the adjustment mechanism 10 By rotating the screw 410, the sagittal balance and coronal balance can be easily adjusted.

In addition, the expandable cage 600 according to the present invention can be inserted in the direction of both the left or the right, taking into account the method of insertion in the lateral or anterolateral side of the spine, and also a coronal control unit for the insertion direction ( 400) can be selectively extended to the left or right of the spine after insertion by changing the anteroposterior direction.

In other words, if the upper level of the spine of the subject's surgery range sits down on the left side and the lower level sits down on the right side, the upper level should be extended to the left and the lower level should be extended to the right, the present invention is Without the need to cut both the and the right side, only one side is cut, and the expandable cage 600 is inserted in a different front-rear direction corresponding to the expansion position through the cut portion thereof, and then expanded.

For example, when the subject's left side (left side or ipsilateral side) is to be incised and the left side of the spine needs to be extended when the subject is viewed from the front, the user may have an expandable cage 600 so that the coronal control unit 400 is located near the incision site. ), and insert it into the implantation space through the insertion device. On the other hand, when the right side of the spine is to be expanded in a state where the left side of the subject is incised, the user adjusts the front and rear directions of the expandable cage 600 so that the coronal control unit 400 is located in front of the side far from the incision. It can be inserted into the implantation space through the insertion device.

As described above, in the method of inserting the expandable cage 600 of the present invention, the coronal balance can be adjusted by selectively expanding the left or right side of the spine by changing the direction of the coronary control unit 400 according to the state of the subject's spine, Since both the left and right sides of the spine can be extended even with an incision on one side, the effect of minimizing the incision can be provided.

According to the above, in the method of inserting the expandable cage 600 according to the embodiment of the present invention, first insert the non-expandable expandable cage 600 from the side or anterolateral side of the spine through the insertion mechanism, and then adjust the insertion. By rotating the height adjustment screw 310 through the mechanism 10 to increase the separation distance between the upper member 100 and the lower member 200, the expandable cage 600 is first expanded (horizontal expansion) to achieve sagittal balance. After adjusting the sagittal balance in this way, by changing the insertion depth of the adjustment mechanism 10 to rotate the tilt adjustment screw 410 to expand one side of the expandable cage 600, the expandable cage 600 is expanded second To adjust the coronal balance.

The present invention has been described with reference to the embodiments shown in the drawings, but these are merely exemplary, and those of ordinary skill in the art will appreciate that various modifications and equivalent other embodiments are possible therefrom. Therefore, the true technical protection scope of the present invention should be determined by the technical spirit of the appended claims.

10: control mechanism 100: upper member
110: upper slope 120: first slope
130: upper through hole 200: lower member
210: lower slope 220: second slope
230: lower through hole 300: thalamus control unit
310: height adjustment screw 311: first adjustment hole
312: first flange 320: height adjustment member
321: adjustment unit 3211: first sliding surface
3212: second sliding surface 3213: screw connection hole
322: connection part 3221: insertion part
323: support part 3231: insertion hole
324: first slope ground 325: second slope ground
330: support connection 331: connection shaft
332: first support link 3321: upper pin
333: second support link 3331: lower pin
334: pin insertion hole 400: tubular control unit
410: inclination adjustment screw 411: second adjustment hole
412: second flange 420: moving member
430: inclination adjustment unit 431: rotation shaft
432: upper link 433: lower link
500: guide unit 510: seat
511: first seating groove 512: second seating groove
600: expandable cage

Claims (20)

An upper member;
A lower member spaced apart from the lower part of the upper member;
It is located between the upper member and the lower member, and adjusts the sagittal balance of the spine by adjusting the separation distance between the upper member and the lower member, and is arranged along the longitudinal direction of the upper member and the lower member. A sagittal adjustment unit comprising a height adjustment screw that is formed with a screw thread on the outer circumferential surface and through which an adjustment mechanism is inserted into the inside to rotate in association with the rotation of the adjustment mechanism;
It is located between the upper member and the lower member, is coupled to one side of each of the upper member and the lower member, and raises and lowers one side of each of the upper member and the lower member to reduce the inclination of the upper member and the lower member. It adjusts the coronal balance of the spine by adjusting it, is arranged along the longitudinal direction of the upper member and the lower member, a thread is formed on the outer circumferential surface, and the adjustment mechanism is inserted through the inside to prevent the rotation of the adjustment mechanism. A tubular adjustment unit comprising a tilt adjustment screw that rotates in conjunction with each other; And
A guide unit that is positioned between the upper member and the lower member and is provided with an end portion of the height adjustment screw positioned to face each other and a seating portion on which the end portion of the inclination adjustment screw is seated to guide the height adjustment screw and the inclination adjustment screw Expandable cage for the spine, characterized in that it is configured, including. The method of claim 1,
The thalamus control unit,
It is screwed with the height adjustment screw to move according to the rotation of the height adjustment screw, the upper part is in contact with the lower surface of the upper member and the lower part is in contact with the upper surface of the lower member, and between the upper member and the lower member according to the movement A height adjustment member for adjusting the separation distance of the;
One side is connected to the height adjustment member, the other side is connected to each of the upper member and the lower member, the support connection portion for supporting the height adjustment member; extendable cage for the spine, characterized in that it comprises a. The method of claim 2,
The height adjustment member,
The height adjustment screw is screwed through the screwing hole and moves by the rotation of the height adjustment screw, and the upper member is in contact with the lower surface of the upper member and the lower part is in contact with the upper surface of the lower member. And an adjustment unit for elevating the lower member and,
A support part positioned on the other side of the upper member and the lower member to support the upper member and the lower member,
An expandable cage for spine, characterized in that it comprises a connection part connecting the adjustment part and the support part. The method of claim 3,
The adjustment unit,
A first sliding surface that is formed to be inclined and is in contact with the upper slope formed on the lower surface of the upper member and slides along the upper slope when moving,
It is formed to be inclined to contact a lower inclined surface formed on the upper surface of the lower member and formed to include a second sliding surface that slides along the lower inclined surface when moving,
It characterized in that it is configured to reduce or expand the separation distance between the upper member and the lower member by raising and lowering the upper member and the lower member along the first sliding surface and the second sliding surface according to movement. Expandable cage for the spine. The method of claim 4,
The adjustment unit,
The extended cage for the spine, characterized in that the first sliding surface and the second sliding surface are formed to have the same inclination angle with respect to the moving direction. The method of claim 5,
The adjustment unit,
The first sliding surface and the second sliding surface are positioned symmetrically to each other in the vertical direction, and are formed to become narrower toward the inside of the upper member and the lower member, and the space between the upper member and the lower member as they move inside Extendable cage for the spine, characterized in that configured to extend the distance. The method of claim 3,
The upper member has a first inclined surface formed on a lower surface of the other end thereof so as to incline upward toward the outside,
The lower member has a second inclined surface inclined downwardly toward the outside on the upper surface of the other end opposite to the first inclined surface,
The support portion is an expandable cage for the spine, characterized in that configured to form a first inclined support surface corresponding to the first inclined surface and a second inclined support surface corresponding to the second inclined surface. The method of claim 3,
The support part,
The adjustment mechanism is inserted through, and the expansion cage for the spine, characterized in that the insertion hole is formed coaxial with the screw coupling hole. The method of claim 3,
The support connection part,
A connection shaft coupled to the support,
One side is rotatably coupled to the connection shaft and the other side is a first support link rotatably coupled to the upper member,
One side is rotatably coupled to the connecting shaft and the other side is an expandable cage for spine, characterized in that it comprises a second support link rotatably coupled to the lower member. The method of claim 1,
The upper member,
An expandable cage for a spine, characterized in that the planar shape is formed in a rectangular shape, and the upper surface is formed to be inclined downward from the front to the rear of the spine with respect to the sagittal plane of the spine. The method of claim 10,
The lower member,
An expandable cage for a spine, characterized in that the planar shape is formed in a rectangular shape so as to correspond to the planar shape of the upper member, and the lower surface is formed to be inclined upwardly from the front to the rear of the spine with respect to the sagittal plane of the spine. The method of claim 2,
The coronal control unit,
A movable member that has a thread formed on the inner circumferential surface in a tubular shape so that the tilt adjustment screw is screwed into the inside, and moves according to the rotation of the tilt adjustment screw
One side is connected to the movable member, the other side is connected to each of the upper member and the lower member, and configured to include an inclination adjusting unit for raising and lowering one side of the upper member and the lower member according to the movement of the moving member. Expandable cage for the spine characterized by. The method of claim 12,
The tilt adjustment unit,
A rotating shaft coupled to the moving member,
One side is rotatably coupled to the rotation shaft and the other side is an upper link coupled to one side of the upper member,
One side is rotatably coupled to the rotation shaft and the other side is an expandable cage for spine, characterized in that it comprises a lower link coupled to one side of the lower member. delete The method of claim 12,
The height adjustment screw,
The control mechanism is inserted into the inside and rotated by the rotation of the control mechanism, and a first control hole having a polygonal cross-sectional shape is formed,
The tilt adjustment screw,
The adjusting mechanism is inserted into the inside and rotated by the rotation of the adjusting mechanism,
An expandable cage for a spine, characterized in that a second control hole having the same diameter and cross-sectional shape as the first control hole is formed. The method of claim 15,
The height adjustment screw and the inclination adjustment screw are arranged to be aligned with each other so that the first adjustment hole and the second adjustment hole are coaxially arranged,
The adjustment mechanism is an expandable cage for the spine, characterized in that configured to rotate at least one of the height adjustment screw and the inclination adjustment screw according to the insertion depth. delete delete delete delete

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