KR102467682B1 - Expandable intervertebral fusion implant cage - Google Patents

Abstract

The present invention relates to an expandable intervertebral body fusion prosthesis, which is inserted between vertebrae and used for fusion of the vertebrae, and then pushes the upper and lower plates of the intervertebral body fusion prosthesis through a tightening device Expandable type that expands the distance between vertebrae and vertebrae by moving it in an oblique direction and expanding it up and down, and expands the filling space inside the intervertebral fusion prosthesis so that the intervertebral fusion prosthesis can be stably fused to the vertebrae It relates to an intervertebral body fusion prosthesis.

Description

Expandable intervertebral fusion implant cage}

The present invention relates to an intervertebral body fusion prosthesis, and more particularly, by pushing the upper and lower plates of the intervertebral body fusion prosthesis inserted between the vertebrae and moving them in an oblique direction to expand them in the vertical direction, thereby expanding the vertebrae and the vertebrae. It is fixed while extending the distance between the intervertebral bodies to perform the role of a disc, and expands the filling space for filling artificial bones and bone replacement artificial materials inside the intervertebral body prosthesis so that the intervertebral body prosthesis can be stably fused to the vertebrae. It relates to an expandable intervertebral body fusion prosthesis.

In general, the vertebral body is composed of 32 to 35 vertebrae that make up the torso and intervertebral disks between the vertebrae, that is, disks. is the central part of

Vertebrae consist of 7 cervical vertebrae, 12 thoracic vertebrae, 5 lumbar vertebrae, 5 sacrum vertebrae, and 3~5 coccyx vertebrae. A dog's sacral vertebrae fuse to form one sacrum, and 3 to 5 coccyx vertebrae fuse to form one coccyx.

When a disc is ruptured or weakened due to a disease or accident, it compresses the spinal nerves and causes pain. Intervertebral fusion prosthesis is inserted to perform fusion between the vertebrae.

In the case of this intervertebral body fusion prosthesis, it is inserted between the vertebrae from which the disc was removed to secure space for the bone to grow and enter for fusion, and to secure the gap between the vertebrae to relieve pain and restore the stability of the spine. let it

Here, since the intervertebral body fusion prosthetic material has a size and height determined for each product, there is a problem in that it is difficult to appropriately secure a space between vertebrae, which varies depending on the patient, in a patient-specific manner.

In order to solve the above-mentioned problems, a height-adjustable intervertebral body fusion prosthesis has been proposed in order to appropriately secure the gap between the vertebrae, which varies depending on the patient, in a patient-specific manner. If it is, there is a problem that it is difficult to secure a space to fill the bone graft material because the internal space is cramped.

On the other hand, in fusion, it is important to increase the bone integration between the implanted intervertebral body fusion prosthesis and the vertebrae. There is a problem in that there is a limit to promoting bone fusion by filling an empty space of a limited size with autograft, allograft, or synthetic bone to promote bone fusion.

In order to solve the above problems, the intervertebral body fusion prosthetic material was formed in a porous structure to facilitate fusion with surrounding bone tissue.

However, when the intervertebral body fusion prosthesis is simply formed in a porous structure, it is easy to fuse with the surrounding bone tissue, but the overall strength is lowered. There was a problem that it was difficult to support the bones.

Republic of Korea Patent Publication No. 10-2015-0048150 Republic of Korea Patent No. 10-1502061 Republic of Korea Patent No. 10-2103833

The present invention is to improve the above problems, and after the operation of the intervertebral body fusion prosthetic material inserted between the vertebrae and used for fusion of the vertebrae, the upper and lower plates of the intervertebral body fusion prosthetic material are removed through a tightening device. The intervertebral fusion prosthesis can be stably fused to the vertebral bone by expanding the distance between the vertebrae and expanding the filling space inside the intervertebral body fusion prosthesis by pushing it in an oblique direction and expanding it up and down. It is an object of the present invention to provide an expandable intervertebral body fusion prosthesis.

In addition, the technical problems to be achieved by the present invention are not limited to the technical problems mentioned above, and other technical problems not mentioned are clearly understood by those skilled in the art from the description below. It could be.

In order to achieve the above object, the present invention has a filling space formed therein, a coupling hole formed in the center of the front surface, an installation hole formed in the center of the rear surface and having a threaded portion formed on the inner periphery, and both sides of the outside A main body including an inclined groove formed obliquely on the surface; It is movably installed on the upper part of the main body, and includes a through hole formed in the center so as to be open in the vertical direction, an inclined piece protruding obliquely from the lower surface of both edges in the longitudinal direction, and a moving member formed in the width direction of the lower surface. top plate; It is movably installed in the lower part of the main body, and includes a through hole formed in the center so as to be open in the vertical direction, an inclined piece protruding obliquely from the upper surface of both edges in the longitudinal direction, and a moving member formed in the width direction of the upper surface. lower plate; A center washer that is installed in the charging space of the main body and pressurizes the upper and lower plates, and includes a moving piece coupled to the coupling hole of the main body, a pressing piece extending from the end of the moving piece, and a coupling groove formed in the center of the rear surface of the pressing piece. ; And installed in the charging space of the main body to press the upper and lower plates, and a coupling piece coupled to the coupling groove of the center washer, extending from the end of the coupling piece, and threaded on the outer periphery to be screwed into the installation hole of the main body. A center shaft formed in the center of the rear surface of the rotation piece and the rotation piece, including a tightening groove in which a screw portion is formed on the inner periphery; Including, but characterized in that the upper plate and the lower plate are moved in an oblique direction relative to the main body and expanded.

Here, the inclined groove includes a first inclined groove formed on the front side in the longitudinal direction of the main body and a second inclined groove formed on the rear side spaced apart from the first inclined groove by a predetermined interval, the first and second inclined grooves. includes an upper inclined groove that slopes downward from the front to the rear, and a lower inclined groove extending from the lower end of the upper inclined groove and inclined upward from the front to the rear so as to be symmetrical to the upper inclined groove, and the inclined piece is a top plate And a first inclined piece protruding obliquely from the front of the lower plate in the longitudinal direction toward the rear, and a second inclined piece spaced apart from the first inclined piece at a predetermined interval and protruding obliquely from the front to the rear. The second inclined piece is coupled to each upper inclined groove of the first and second inclined grooves of the main body, moves in the inclined direction of each upper inclined groove and expands, and the first and second inclined pieces of the lower plate are connected to the first inclined groove of the main body. And doedoe coupled to each lower inclined groove of the second inclined groove, it moves in the inclined direction of each lower inclined groove and extends.

The movable member includes first and second movable members spaced apart from the lower surface of the upper plate at a predetermined interval in the longitudinal direction and protruding downward, and slot-shaped movable holes formed through the center of the first and second movable members. And, it includes first and second movable members spaced apart from the upper surface of the lower plate at a predetermined interval in the longitudinal direction and protruding upward, and a slot-shaped movable hole formed through the center of the first and second movable member, The first and second movable members are disposed at a front side of the first and second movable members of the upper plate, and the front side of the first movable member of the upper plate is in contact with the rear surface of the first movable member of the lower plate. The rear side of the second movable member of the upper plate is disposed so as to come into contact with the front side of the second movable member of the upper plate, so that the first and second movable members of the upper plate and the first and second movable members of the lower plate are displaced from each other.

At this time, the diameter of the moving piece of the center washer and the connecting piece of the center shaft is formed to correspond to the width of each moving hole of the first moving member and the second moving member of the upper and lower plates, and the pressing piece of the center washer and the rotating piece of the center shaft The diameter is larger than the width of each moving hole of the first moving member and the second moving member of the upper and lower plates, and the moving piece of the center washer and the coupling piece of the center shaft are the first moving member and the second moving member of the upper and lower plates. It is coupled through the movable hole of the center washer and the rotation piece of the center shaft is positioned so as to come into contact with the rear surfaces of the first movable member and the second movable member of the upper plate.

Meanwhile, when the pressing piece presses the rear side of the first movable member of the upper plate, the first movable member of the lower plate disposed so that the rear side abuts against the front side of the first movable member of the upper plate is pressed, thereby moving the first movable member of the upper plate. and the first movable member of the lower plate moves forward along the movable piece.

In addition, when the rotating piece rotates and presses the rear side of the second movable member of the upper plate, the second movable member of the lower plate disposed so that the rear side comes into contact with the front side of the second movable member of the upper plate is pressed, thereby causing the second movement of the upper plate. The member and the second movable member of the lower plate are made to move toward the front along the coupling piece.

Preferably, when the center shaft screwed into the installation hole of the main body is rotated and moved forward, and the center washer coupled to the coupling piece of the center shaft is moved forward by pressing the center washer coupled to the coupling groove, the rotation piece of the center shaft moves forward to the second portion of the upper plate. When the rear side of the movable member is rotated and pressed, the second movable member of the lower plate disposed so that the rear side is in contact with the front side of the second movable member of the upper plate is pressed, so that the second movable member of the upper plate and the second movable member of the lower plate are While moving toward the front, the second movable member of the upper plate and the second movable member of the lower plate are guided by the coupling piece penetrated into the moving hole and move in the vertical direction while the upper inclined groove and the lower part formed in the second inclined groove of the main body. When the upper plate and the lower plate coupled to the inclined groove by the second inclined piece are expanded while moving in the inclined direction of the upper inclined groove and the lower inclined groove, and at the same time, when the pressing piece of the center washer presses the rear side of the first movable member of the upper plate, the upper plate The first movable member of the lower plate disposed so that the rear side of the first movable member is in contact with the front side of the first movable member is pressed, so that the first movable member of the upper plate and the first movable member of the lower plate move toward the front, but the first movement of the upper plate The first movable member of the member and the lower plate is guided by the movable piece coupled through the movable hole and moves in the vertical direction, and the upper plate is coupled to the upper and lower inclined grooves formed in the first inclined groove of the main body by the first inclined piece. And the lower plate extends while moving in the inclined direction of the upper inclined groove and the lower inclined groove.

As described above, the present invention having the above configuration, by extending the intervertebral body fusion prosthetic material inserted between the vertebrae and used for fusion of the vertebrae to expand the distance between the vertebrae It is possible to properly secure the gap between the vertebrae, which differs according to the patient's physical condition, according to the patient's needs, and to secure a wide filling space for filling artificial bones and bone substitutes, making it an intervertebral body fusion prosthesis. It can be stably fused to the vertebrae, has sufficient durability, promotes bone growth and induces bonding between adjacent vertebrae to promote bone union, and the procedure is simple and the procedure time can be shortened. Thereby, it is possible to minimize the burden on the patient, and there is an effect of promoting the result of bone fusion quickly and stably as well as fusion between the vertebrae.

1 is a perspective view schematically showing an expandable intervertebral body fusion prosthesis according to the present invention;
2 is a perspective view schematically showing an expanded state of an expandable intervertebral body fusion prosthesis according to the present invention;
3 is an exploded perspective view schematically showing an expandable intervertebral body fusion prosthesis according to the present invention;
4 is a perspective view schematically showing the main body of the expandable intervertebral body fusion prosthesis according to the present invention;
5 is a perspective view schematically showing an upper plate of an expandable intervertebral body fusion prosthesis according to the present invention;
6 is a perspective view schematically showing a lower plate of an expandable intervertebral body fusion prosthesis according to the present invention;
7 is a side view schematically showing the operating process of the expandable intervertebral body fusion prosthesis according to the present invention;
8 is a cross-sectional side view schematically showing the operating process of the expandable intervertebral body fusion prosthesis according to the present invention;
9 and 10 are views schematically showing how the expandable intervertebral body fusion prosthesis according to the present invention is inserted between vertebrae and expanded.

Hereinafter, preferred embodiments according to the present invention will be described in detail with reference to the accompanying drawings. In addition, in this embodiment, the scope of the present invention is not limited, it is presented only as an example, and various changes are possible within a range that does not deviate from the technical gist.

Since the present invention can make various changes and have various embodiments, specific embodiments are illustrated in the drawings and described in the detailed description.

However, this is not intended to limit the present invention to specific embodiments, and should be understood to include all modifications, equivalents, and substitutes included in the spirit and scope of the present invention. Like reference numerals have been used for like elements throughout the description of each figure.

Terms used herein are used only for the purpose of distinguishing one component from another. For example, a second element may be termed a first element, and similarly, a first element may be termed a second element, without departing from the scope of the present invention. The terms and/or include any combination of a plurality of related recited items or any of a plurality of related recited items.

It is understood that when an element is referred to as being "connected" or "connected" to another element, it may be directly connected or connected to the other element, but other elements may exist in the middle. It should be. On the other hand, when an element is referred to as “directly connected” or “directly connected” to another element, it should be understood that no other element exists in the middle.

Terms used in this application are only used to describe specific embodiments, and are not intended to limit the present invention. Singular expressions include plural expressions unless the context clearly dictates otherwise. In this application, the terms "include" or "have" are intended to designate that there is a feature, number, step, operation, component, part, or combination thereof described in the specification, but one or more other features It should be understood that the presence or addition of numbers, steps, operations, components, parts, or combinations thereof is not precluded.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which the present invention belongs. Terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with the meaning in the context of the related art, and unless explicitly defined in this application, it should not be interpreted in an ideal or excessively formal meaning. don't

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. 1 is a perspective view schematically showing an expandable intervertebral body fusion prosthesis according to the present invention, FIG. 2 is a perspective view schematically showing an expanded state of the expandable intervertebral body fusion prosthesis according to the present invention, and FIG. 3 is a perspective view according to the present invention. An exploded perspective view schematically showing the expandable intervertebral body fusion prosthesis, Figure 4 is a perspective view schematically showing the main body of the expandable intervertebral body fusion prosthesis according to the present invention, Figure 5 is an upper plate of the expandable intervertebral body fusion prosthesis according to the present invention It is a schematic perspective view, Figure 6 is a perspective view schematically showing the lower plate of the expandable intervertebral body fusion prosthesis according to the present invention, Figure 7 is a side view schematically showing the operating process of the expandable intervertebral body fusion prosthesis according to the present invention, 8 is a cross-sectional side view schematically showing the operation process of the expandable intervertebral body fusion prosthesis according to the present invention, and FIGS. It is a drawing that represents

As shown in the drawings, the expandable intervertebral body fusion prosthesis 1 according to the present invention includes a main body 10, an upper plate 30, a lower plate 50, a sensor washer 70, and a center shaft 80. It is composed by

The main body 10 is a rectangular parallelepiped body, and upper and lower portions are open so that a filling space 11 is formed therein so that artificial bones and bone substitute artificial materials are filled and fused stably.

Here, a coupling hole 13 is formed through the center of the front surface of the main body 10, and an installation hole 14 is formed through the center of the rear surface, and a threaded portion (not shown) is formed on the inner periphery of the installation hole 14. is formed

In addition, inclined grooves 15 are inclinedly formed on both outer surfaces of the main body 10, and the inclined grooves 15 are first inclined grooves 16 formed on the front side in the longitudinal direction of the main body 10 And a second inclined groove 17 formed on the rear side spaced apart from the first inclined groove 16 at a predetermined interval.

Here, the inclined groove 15 is formed extending from the lower end of the upper inclined grooves 16a and 17a and the upper inclined grooves 16a and 17a, which slope downward from the front of the main body 10 to the rear, and the upper inclined grooves 16a and 17a. It is formed in a substantially “>” shape including lower inclined grooves 16b and 17b inclined upward from the front to the rear so as to be symmetrical to the grooves 16a and 17a.

At this time, the upper inclined grooves 16a and 17a and the lower inclined grooves 16b and 17b are formed to have an inclination angle of approximately 15 ° to 75 ° in clockwise and counterclockwise directions with respect to the horizontal plane, preferably the upper inclined grooves The grooves 16a and 17a and the lower inclined grooves 16b and 17b are formed to have an inclination angle of 30° to 45°.

In one embodiment of the present invention, although the upper inclined grooves 16a and 17a and the lower inclined grooves 16b and 17b have the same inclination angle, the upper inclined grooves 16a and 17a and the lower inclined grooves 16b and 17b ) It is also possible to have different inclination angles, and it is not limited thereto and can be variously changed.

In addition, in one embodiment of the present invention, two inclined grooves 15 are formed on both outer surfaces of the main body 10 at a predetermined interval in the longitudinal direction, but the number of inclined grooves 15 is It is not limited and can be variously modified.

The upper plate 30 is a plate-shaped body, and is movably installed on the upper part of the main body 10, and a through hole 31 in a substantially rectangular shape is formed perpendicularly to the center so as to be open in the vertical direction.

In addition, a plurality of protrusions 32 are formed on the upper surface of both edges in the longitudinal direction of the top plate 30 and protrude upward at a predetermined interval, and the protrusions 32 are intervertebral bodies in contact with the vertebrae 3 and 3'. It is made to fix the movement of the fusion prosthetic material (1).

Here, the protrusion 32 is preferably formed in a triangular shape or a wedge shape, but is not limited thereto.

On the other hand, inclined pieces 33 are protruded downward from the lower surface of both edges of the top plate 30, and the inclined pieces 33 are upper inclined grooves 16a of the first inclined grooves 16 of the main body 10. ) formed at a predetermined interval in the longitudinal direction from the first inclined piece 33a movably coupled to the first inclined piece 33a and the upper inclined groove of the second inclined groove 17 of the main body 10 It is configured to include a second inclined piece 33b movably coupled to (17a).

The first and second inclined pieces 33a and 33b move in an inclined direction along the upper inclined grooves 16a and 17a of the first and second inclined grooves 16 and 17 formed in the main body 10. made possible

To this end, each inclined piece 33 of the top plate 30 is inclined backward to correspond to the upper inclined grooves 16a and 17a of each inclined groove 15 of the main body 10 . That is, the first and second inclined pieces 33a and 33b of the top plate 30 are coupled to the respective upper inclined grooves 16a and 17a of the first and second inclined grooves 16 and 17 of the body 10 It is formed in a parallelogram shape in which the front and rear sides are inclined toward the rear side so that forward and backward movement is possible along the inclined direction of the upper inclined grooves 16a and 17a.

At this time, the inclination angles of the first and second inclined pieces 33a and 33b correspond to the inclination angles of the upper inclined grooves 16a and 17a of the first and second inclined grooves 16 and 17 of the main body 10. formed to be

On the other hand, the movable member 35 is protruded from the lower surface of the top plate 30 in the width direction, and the movable member 35 is first and second movable members spaced apart at regular intervals in the longitudinal direction of the top plate 30. (35a, 35b), and the first and second moving members (35a, 35b) of the first and second moving member (35a, 35b) of the central portion of the slot-shaped moving hole (37) is formed through.

That is, the first and second movable members 35a and 35b protrude downward from the lower surface of one side deflected forward from the center side of the top plate 30 and the lower surface of the rear side of the top plate 30 in the width direction, respectively. And, a moving hole 37 is formed through the center of the first and second moving members 35a and 35b in a horizontal direction, and the moving hole 37 is formed through the first and second moving members 35a and 35b. ) is formed in the form of a slot in the vertical direction of.

The lower plate 50 is a plate-shaped body, and is movably installed in the lower portion of the main body 10, and has a through hole 51 in a substantially rectangular shape perpendicular to the center so as to be open in the vertical direction.

In addition, a plurality of protrusions 32 are spaced apart at regular intervals from the lower surface of both edges in the longitudinal direction of the lower plate 50 and protrude downward. It is made to fix the movement of the fusion prosthetic material (1).

Here, inclined pieces 53 are protruded upward from the upper surface of both edges of the lower plate 50 in the longitudinal direction, and the inclined pieces 53 are lower inclined grooves of the first inclined groove 16 of the main body 10. The first inclined piece 53a movably coupled to (16b) and the first inclined piece 53a are spaced apart from each other in the longitudinal direction by a predetermined interval, and the lower part of the second inclined groove 17 of the main body 10 It is configured to include a second inclined piece 53b movably coupled to the inclined groove 17b.

At this time, the first and second inclined pieces 53a and 53b are inclined along the lower inclined grooves 16b and 17b of the first and second inclined grooves 16 and 17 formed in the main body 10. made to be movable.

To this end, the first and second inclined pieces 53a and 53b of the lower plate 50 are attached to the lower inclined grooves 16b and 17b of the first and second inclined grooves 16 and 17 of the main body 10. Combined, the front and rear surfaces are formed in a parallelogram shape inclining toward the rear side so that forward and backward movement is possible along the inclined direction of the lower inclined grooves 16b and 17b, and the first and second inclined pieces 53a, The inclination angle of 53b) corresponds to the inclination angle of the lower inclination grooves 16b and 17b of the first and second inclination grooves 16 and 17 of the main body 10 .

On the other hand, the movable member 55 is protruded from the upper surface of the lower plate 50 in the width direction, and the movable member 55 is first and second movable members spaced apart at regular intervals in the longitudinal direction of the lower plate 50. (55a, 55b), and the first and second moving members (55a, 55b) of the first and second moving member (55a, 55b) of the central portion of the slot-shaped moving hole (57) is formed through.

That is, the first and second movable members 55a and 55b protrude upward from the upper surface of one side deflected forward from the center side of the lower plate 50 and the upper surface of the rear side of the lower plate 50 in the width direction, respectively. And, a moving hole 57 is formed through the center of the first and second moving members 55a and 55b in a horizontal direction, and the moving hole 57 is formed through the first and second moving members 55a and 55b. It is formed in the form of a slot in the vertical direction of.

Here, the first and second movable members 55a and 55b protruding upward from the upper surface of the lower plate 50 are the first and second movable members 55a and 55b protruding downward from the lower surface of the upper plate 30. Each of the moving members 35a and 35b of the upper plate 30 and each of the moving members 55a and 55b of the lower plate 50 are displaced from each other so as to be located on the front side of the plates 35a and 35b. That is, when the upper and lower plates 30 and 50 are installed on the upper and lower parts of the main body 10, the first and second movable members 35a and 35b of the upper plate 30 and the first and second moving members 35a and 35b of the lower plate 50 The first movable member 55a of the lower plate 50 is disposed forward than the first movable member 35a of the upper plate 30 so that the second movable members 55a and 55b do not interfere with each other, and the lower plate 50 of the first and second movable members 35a and 35b of the upper plate 30 and the lower plate 50 so that the second movable member 55b of ) is disposed in front of the second movable member 35b of the upper plate 30. The first and second movable members 55a and 55b are displaced from each other.

Due to this, when the upper and lower plates 30 and 50 are installed on the upper and lower parts of the main body 10, the first movable member 55a and the upper plate 30 of the lower plate 50 move from the front of the main body 10 toward the rear. The first movable member 35a of ), the second movable member 55b of the lower plate 50, and the second movable member 35b of the upper plate 30 are sequentially disposed, and the first movement of the lower plate 50 The rear side of the member 55a is disposed in contact with the front side of the first movable member 35a of the upper plate 30, and the rear side of the second movable member 55b of the lower plate 50 is the upper plate 30 It is disposed to come into contact with the front side of the second movable member (35b) of the.

In one embodiment of the present invention, the first and second movable members 35a and 35b of the upper plate 30 are disposed on the rear side of the first and second movable members 55a and 55b of the lower plate 50. However, it is also possible that the first and second movable members 35a and 35b of the upper plate 30 are positioned on the front side of the first and second movable members 55a and 55b of the lower plate 50. .

And, in one embodiment of the present invention, the moving members 35 and 55 respectively formed on the upper plate 30 and the lower plate 50 are formed in two pieces, but the moving members 35 and 55 are more or less than that. It is also possible to be formed by the number of, but is not limited thereto.

Meanwhile, each inclined piece 33, 53 of the upper plate 30 and the lower plate 50 has at least one or more filling holes 38, 58 for stably fusion by filling artificial bones and bone substitute artificial materials. penetrating is formed.

Here, the filling holes 38 and 58 are preferably formed in a circular shape, but may be changed into various other shapes such as an ellipse or a square.

The center washer 70 is installed inside the filling space 11 formed in the main body 10, and extends from the movable piece 71 forming the front part and the end of the movable piece 71, It is configured to include a pressing piece 73 forming the rear portion.

Here, the movable piece 71 penetrates into the movable holes 37 and 57 of the first movable members 35a and 55a of the upper plate 30 and the lower plate 50 and is coupled to the movable piece 71. The diameter is formed to correspond to the width of the moving holes 37 and 57 of the first moving members 35a and 55a of the upper and lower plates 30 and 50.

In addition, the pressure piece 73 has a diameter of the pressure piece 73 so as to press the first moving members 35a and 55a of the upper plate 30 and the lower plate 50 ( 50) is formed larger than the width of the moving holes 37 and 57 of the first moving members 35a and 55a.

At this time, the length of the pressing piece 73 is formed to correspond to the distance between the first movable member 35a of the upper plate 30 and the second movable member 55b of the lower plate 50 .

According to the structure as described above, after the moving piece 71 is penetrated through the moving holes 37 and 57 of the first moving members 35a and 35b of the upper plate 30 and the lower plate 50, the pressing piece 73 presses the rear side of the first movable member 35a of the top plate 30, and as the pressing piece 73 presses the first movable member 35a of the top plate 30, the top plate 30 Presses the first movable member 55a of the lower plate 50, the rear side of which is in contact with the front side of the first movable member 35a of the upper plate 30, and thereby the first movable member 35a of the upper plate 30 and the lower plate The first movable member (55a) of (50) is moved toward the front.

At this time, the first movable members 35a and 55a of the upper plate 30 and the lower plate 50 are guided by the movable pieces 71 penetrated into the respective movable holes 37 and 57 to move in the vertical direction.

Meanwhile, the moving piece 71 of the center washer 70 is formed to correspond to the diameter of the coupling hole 13 so as to be inserted into and coupled to the coupling hole 13 formed on the front surface of the main body 10 .

Also, a coupling groove 75 is formed at the center of the end of the pressing piece 73 of the center washer 70 .

The center shaft (Center Shaft, 80) is installed inside the filling space 11 formed in the main body 10, and is formed extending from the end of the coupling piece 81 and the coupling piece 81 forming the front portion It is configured to include a rotating piece 83 forming the rear portion, and is connected and installed to the rear of the center washer 70.

Here, the coupling piece 81 has a diameter of the coupling piece 81 so as to be through-coupled to the moving holes 37 and 57 of the second moving members 35b and 55b of the upper plate 30 and the lower plate 50, respectively. is formed to correspond to the width of the moving holes 37 and 57 of the second moving members 35b and 55b of the upper and lower plates 30 and 50.

The diameter of the rotating piece 83 is such that the rotating piece 83 rotates and presses the second moving members 35b and 55b of the upper and lower plates 30 and 50. It is formed larger than the width of the moving holes 37 and 57 of the second moving members 35b and 55b of (50).

According to the structure as described above, after the coupling pieces 81 are through-coupled to the moving holes 37 and 57 of the second moving members 35b and 55b of the upper and lower plates 30 and 50, then the rotating pieces As (83) presses the rear side of the second movable member (35b) of the top plate (30) and the rotating piece (83) presses the second movable member (35b) of the top plate (30), the top plate (30) Presses the second movable member 55b of the lower plate 50, the rear side of which is in contact with the front side of the second movable member 35b, thereby pushing the second movable member 35b of the upper plate 30 and the lower plate The second movable member 55b of 50 moves forward.

At this time, the second movable members 35b and 55b of the upper plate 30 and the lower plate 50 are guided by the coupling pieces 81 penetrated into the respective movable holes 37 and 57 to move in the vertical direction.

Here, the coupling piece 81 of the center shaft 80 is inserted into the coupling groove 75 formed in the pressing piece 73 of the center washer 70, and for this, the coupling piece 81 is It is formed to correspond to the diameter of the coupling groove 75.

On the other hand, the outer periphery of the rotating piece 83 of the center shaft 80 is formed through the center of the rear surface of the main body 10, and a threaded portion (not shown) is screwed into the installation hole 14 having a threaded portion on the inner periphery. ) is formed.

In addition, a surgical instrument including a tightening mechanism (not shown) for gripping and expanding the expandable intervertebral body fusion prosthesis 1 according to the present invention is inserted and installed at the center of the end of the rotating piece 83 of the center shaft 80. A tightening groove 85 is formed to be formed, and the tightening groove 85 is formed in the form of a hexagonal nut so that a tightening mechanism in the form of an Allen wrench is inserted.

With the structure as described above, when the tightening mechanism is inserted into the tightening groove 85 formed in the rotating piece 83 of the center shaft 80 and rotated, the installation hole 14 of the main body 10 The rotating piece 83 of the center shaft 80 screwed into the center shaft 80 rotates and moves forward, and the center washer 70 coupled to the coupling piece 81 of the center shaft 80 through a coupling groove 75 The center shaft 80 moves forward due to pressurization according to the forward movement.

On the other hand, the diameter of the moving piece 71 of the center washer 70 and the coupling piece 81 of the center shaft 80 and the first and second moving members 35a of the upper plate 30 and lower plate 50, The vertical length of the movable holes 37 and 57 formed through 55a, 35b, and 55b is made in a ratio of 0.5 to 1: 1 to 2, more preferably, the movable piece 71 of the center washer 70 ) And the diameter of the coupling piece 81 of the center shaft 80 and the moving holes formed through the first and second moving members 35a, 55a, 35b, 55b of the upper plate 30 and lower plate 50 ( 37 and 57) are made in the ratio of 0.5:1.

For example, when the diameter of the coupling piece 81 is 0.5 mm, each of the first and second moving members 35a and 55a of the upper plate 30 and the lower plate 50 through which the coupling piece 81 is coupled. , 35b, 55b), the vertical length of the movement holes 37 and 57 is 1 mm, and when the upper plate 30 and the lower plate 50 are expanded based on the main body 10, they expand by 0.5 mm in the vertical direction. made possible

With the structure as described above, when the upper plate 30 and the lower plate 50 are maximally extended upward and downward with respect to the main body 10, the expanded state can be stably maintained.

Here, it is preferable that the diameter of the rotating piece 83 of the center shaft 80 is larger than the diameter of the pressing piece 73 of the center washer 70, but is not limited thereto.

Hereinafter, the coupling process of the expandable intervertebral body fusion prosthesis according to the present invention will be described.

First, the upper plate 30 or/and the lower plate 50 are combined and installed in the charging space 11 of the main body 10 .

At this time, the first and second inclined pieces 33a and 33b protruding downward from the lower surface of both edges of the top plate 30 are first and second inclined grooves formed on both outer surfaces of the main body 10. The first and second inclined pieces 53a and 53b coupled to the upper inclined grooves 16a and 17a of the lower plate 50 and protruding upward from the upper surface of both edges of the lower plate 50 are coupled to the upper inclined grooves 16a and 17a of the lower plate 50. ) are coupled to the lower inclined grooves 16b and 17b of the first and second inclined grooves 16 and 17 formed on both outer surfaces of the.

In addition, center washers 70 are placed in the moving holes 37 and 57 of the first moving members 35a and 55a of the upper and lower plates 30 and 50 coupled to the charging space 11 of the main body 10. The moving piece 71 of the center washer 70 is penetrated, and the pressing piece 73 of the center washer 70 is between the first moving member 35a of the upper plate 30 and the second moving member 55a of the lower plate 50. , and the end of the moving piece 71 of the center washer 70 is inserted into and coupled to the coupling hole 13 of the main body 10.

At this time, the coupling pieces 81 of the center shaft 80 are through-coupled to the moving holes 37 and 57 of the second moving members 35b and 55b of the upper plate 30 and the lower plate 50, and the center washer The coupling piece 81 of the center shaft 80 is coupled to the coupling groove 75 of (70).

Here, the rotating piece 83 of the center shaft 80 is screwed into the installation hole 14 of the main body 10, and the center shaft 80 is rotated clockwise or counterclockwise to form the center shaft 80. ) is moved from the rear to the front of the main body 10 to move the coupling piece 81 of the center shaft 80 to the moving holes 37 of the second moving members 35b and 55b of the upper plate 30 and the lower plate 50, 57), and then continuously move forward to couple the coupling piece 81 of the center shaft 80 to the coupling groove 75 of the center washer 70.

In the case of the extended intervertebral body fusion prosthesis 1 coupled as described above, in the state before expansion, the first and second moving members 35a and 35b of the upper plate 30 are through-coupled to each moving hole 37 of the first and second moving members 35a and 35b. The movable piece 71 of the center washer 70 and the coupling piece 81 of the center shaft 80 are located on the upper side in the movable hole 37 and are the first and second movable members of the lower plate 50. The movable piece 71 of the center washer 70 and the coupling piece 81 of the center shaft 80 through-coupled to each movable hole 57 of (55a, 55b) are located on the lower side within the movable hole 57. , When the upper plate 30 and the lower plate 50 are extended, each of the first and second movable members 35a and 35b of the upper plate 30 moves in an inclined direction along the inclined groove 15 of the main body 10. The movable piece 71 of the center washer 70 coupled to the movable hole 37 and the coupling piece 81 of the center shaft 80 are guided so as to come into contact with the lower side in the movable hole 37 and are moved and positioned. At the same time, the moving piece 71 of the center washer 70 and the coupling piece of the center shaft 80 penetrate through each moving hole 57 of the first and second moving members 55a and 55b of the lower plate 50 ( 81) is guided and moved so as to come into contact with the upper side of the moving hole 57.

Hereinafter, the operation process of the expandable intervertebral body fusion prosthesis according to the present invention will be described.

First, the expandable intervertebral body fusion prosthesis 1 according to the present invention is installed on the patient's treatment site. That is, the expandable intervertebral body fusion prosthesis 1 is inserted and installed between the patient's vertebrae 3 and the vertebrae 3' adjacent thereto using surgical instruments such as tightening instruments.

At this time, the protrusion 32 protruding from the upper surface of the upper plate 30 of the expandable intervertebral body fusion prosthesis 1 and the protrusion 32 protruding from the lower surface of the lower plate 50 are the vertebrae 3, 3'), the movement of the intervertebral body fusion prosthetic material 1 is fixed, and at the same time, the protrusion 32 is closely fixed to the vertebrae 3, 3', so that the expansion type between the vertebrae 3, 3' Separation of the intervertebral body fusion prosthetic material 1 is prevented.

As described above, after inserting and installing the expandable intervertebral body fusion prosthesis 1 in the patient's treatment site, a hexagonal wrench-shaped tightening mechanism is installed in the tightening groove 85 of the center shaft 80, and then the tightening mechanism By rotating in a clockwise or counterclockwise direction, the center shaft 80 screwed into the installation hole 14 of the main body 10 by the rotating piece 83 rotates and moves forward.

That is, the center shaft 80 screwed into the installation hole 14 of the main body 10 during rotation by inserting and installing a tightening mechanism into the tightening groove 85 formed in the rotating piece 83 of the center shaft 80 The rotating piece 83 moves forward while rotating from the rear to the front along the threaded portion.

Here, when the center shaft 80 is moved forward, the center washer 70 having a coupling groove 75 to which the coupling piece 81 of the center shaft 80 is coupled moves forward by the pressurization of the center shaft 80. are moved

In this way, when the center shaft 80 moves forward, the front end of the rotating piece 83 of the center shaft 80 presses the rear side of the second moving member 35b of the top plate 30 to perform the second movement. In the body 10, the upper plate ( 30) is moved forward, and the front side of the second movable member 35b of the upper plate 30 presses the rear side of the second movable member 55b of the lower plate 50 so that the second movable member ( The lower plate 50 is removed from the body 10 so that the coupling piece 81 formed through the movable hole 57 of 55b) and located on the lower side of the movable hole 57 comes into contact with the upper end of the movable hole 57. move forward

In addition, when the center washer 70 moves forward, the front end of the pressing piece 73 of the center washer 70 presses the rear side of the first movable member 35a of the top plate 30 to perform the first movement. In the body 10, the top plate ( 30) forward, and at the same time, the front side of the first movable member 35a of the upper plate 30 presses the rear side of the first movable member 55a of the lower plate 50 so that the first movable member ( The lower plate 50 is removed from the body 10 so that the moving piece 71 formed through the moving hole 57 of 55a) and located on the lower side of the moving hole 57 comes into contact with the upper end of the moving hole 57. move forward

As described above, when the center shaft 80 is rotated and moved forward through the tightening mechanism and the center washer 70 is moved forward at the same time, the first and second moving members 35a of the top plate 30, 35b) moves forward, and at the same time, the first and second moving members 55a and 55b of the lower plate 50 that abut against the front side of the first and second moving members 35a and 35b of the upper plate 30 move forward. While doing so, the upper and lower plates 30 and 50 installed on the upper and lower parts of the main body 10 are moved forward.

At this time, the first and second moving members 35a and 35b of the upper plate 30 and the first and second moving members of the lower plate 50 according to the forward movement of the center shaft 80 and the center washer 70 ( When 55a and 55b) are moved, the inclined pieces 33 and 53 formed on the lower and upper surfaces of both edges of the upper plate 30 and the lower plate 50 are formed on the upper inclined groove 16a of the main body 10. , 17a) and the lower inclined grooves 16b and 17b, the upper plate 30 and the lower plate 50 are expanded while moving in an inclined direction with respect to the main body 10.

As described above, the expandable intervertebral body fusion prosthesis 1 according to the present invention is expanded while the upper and lower plates 50 move in an oblique direction with respect to the main body 10, so that the vertebrae 3 and the vertebrae 3 '), and at the same time, the expansion width can be changed in various ways according to the distance between the vertebrae (3, 3'), which differs depending on the patient's physical condition, so it can be applied according to the patient's needs And, the upper and lower portions are open so that the filling space 11 is formed inside the body 10, and through-holes 31 are formed through the upper plate 30 and the lower plate 50 in the vertical direction so that the main body 10 ) When the upper plate 30 and the lower plate 50 are expanded based on, doedoe formed inside the main body 10, the filling space 11, which is a bone transplant space for bone union, is also greatly expanded into a wide empty space. This promotes bone growth and induces bonding between adjacent vertebrae (3, 3') to promote bone union with surrounding bone tissue.

Due to this, it is possible to promote bone union of the vertebrae (3, 3'), shorten the operation time and minimize the patient's burden at the same time.

In the above, the present invention has been shown and described in relation to specific embodiments, but it is common knowledge in the art that various modifications and changes are possible within the limit that does not depart from the spirit and scope of the invention shown in the appended claims. Anyone who has it will be able to easily understand.

1: Extended intervertebral body fusion prosthesis, 3, 3': vertebrae,
10: main body, 11: charging space,
13: coupling hole, 14: installation hole,
15: inclined groove, 16: first inclined groove,
16a: upper inclined groove, 16b: lower inclined groove,
17: second inclined groove, 17a: upper inclined groove,
17b: lower inclined groove, 30: upper plate,
31: through hole, 32: protrusion,
33; Inclined piece, 33a: first inclined piece,
33b: second inclined piece, 35: moving member,
35a: first moving member, 35b: second moving member,
37: moving hole, 38: filling hole,
50: lower plate, 51: through hole,
52: projection, 53: slope,
53a: first inclined piece, 53b: second inclined piece,
55: moving member, 55a: first moving member,
55b: second moving member, 57: moving hole,
58: filling hole, 70: center washer,
71: moving piece, 73: pressing piece,
75: coupling groove, 80: center shaft,
81: coupling piece, 83: rotation piece,
85: tightening groove.

Claims (7)

A main body including a charging space formed therein, a coupling hole formed in the center of the front surface, an installation hole formed in the center of the rear surface and a threaded portion formed on the inner periphery, and inclined grooves formed on both outer surfaces of the body;
A through-hole formed in the center so as to be movably installed on the upper part of the main body and open in the vertical direction, an inclined piece protruding obliquely from the lower surface of both edges in the longitudinal direction, and a moving member formed in the width direction of the lower surface Including tops;
A through-hole formed in the center so as to be movably installed in the lower part of the main body and open in the vertical direction, an inclined piece protruding obliquely from the upper surface of both edges in the longitudinal direction, and a moving member formed in the width direction of the upper surface Lower plate containing;
It is installed in the charging space of the main body to press the upper and lower plates, and the moving piece coupled to the coupling hole of the main body, the pressing piece extending from the end of the moving piece, and the coupling groove formed in the center of the rear surface of the pressing piece Including center washer; and
Installed in the charging space of the main body to press the upper and lower plates, a coupling piece coupled to the coupling groove of the center washer, and a screw portion extending from the end of the coupling piece and screwed into the installation hole of the main body on the outer periphery. A rotation piece formed thereon, and a center shaft formed in the center of the rear surface of the rotation piece and including a tightening groove in which a screw portion is formed on the inner periphery; including,
Based on the main body, the upper and lower plates are moved in an inclined direction and expanded,
The moving member,
First and second movable members protruding downward from a lower surface of the upper plate at a predetermined interval in a longitudinal direction, and slot-shaped moving holes formed through the center of the first and second movable members, and the lower plate Including first and second movable members spaced apart from the upper surface at a predetermined distance in the longitudinal direction and protruding upward, and slot-shaped moving holes formed through the center of the first and second movable members,
The first and second movable members of the lower plate are disposed on the front side of the first and second movable members of the upper plate, and the front side of the first movable member of the upper plate is in contact with the rear side of the first movable member of the lower plate. The first and second movable members of the upper plate and the first and second movable members of the lower plate are disposed so that the rear side of the second movable member of the lower plate is in contact with the front side of the second movable member of the upper plate. An expandable intervertebral body fusion prosthesis, characterized in that the are displaced from each other.
The method of claim 1,
The inclined groove,
A first inclined groove formed on the front side in the longitudinal direction of the main body, and a second inclined groove formed on the rear side spaced apart from the first inclined groove by a predetermined interval, wherein the first and second inclined grooves are formed on the front side. An upper inclined groove inclined downwardly toward the rear, and a lower inclined groove extending from the lower end of the upper inclined groove and inclined upward from the front to the rear so as to be symmetrical to the upper inclined groove,
The inclined piece,
A first slanted piece protruding obliquely from the front of the upper and lower plates in the longitudinal direction toward the rear, and a second slanted piece spaced apart from the first slanted piece at a predetermined interval and protruding obliquely from the front to the rear,
The first and second inclined pieces of the upper plate are coupled to the respective upper inclined grooves of the first and second inclined grooves of the main body, and are moved and expanded in the inclined direction of each upper inclined groove, and the first and second inclined pieces of the lower plate An expandable intervertebral body fusion prosthesis characterized in that the inclined piece is coupled to each lower inclined groove of the first and second inclined grooves of the main body, and moves in the inclined direction of each lower inclined groove and expands.
delete The method of claim 1,
The diameters of the moving piece of the center washer and the coupling piece of the center shaft are formed to correspond to the widths of the moving holes of the first moving member and the second moving member of the upper and lower plates, and the rotation of the pressing piece of the center washer and the center shaft The diameter of the piece is larger than the width of each moving hole of the first moving member and the second moving member of the upper and lower plates,
The movable piece of the center washer and the coupling piece of the center shaft are coupled through the movable holes of the first movable member and the second movable member of the upper and lower plates, and the pressing piece of the center washer and the rotating piece of the center shaft are coupled to the upper plate. An expandable intervertebral body fusion prosthesis, characterized in that positioned so as to come into contact with the rear surfaces of the first movable member and the second movable member.
The method of claim 4,
When the pressing piece presses the rear side of the first movable member of the upper plate,
The first movable member of the lower plate disposed so that the front side of the first movable member of the upper plate is in contact with the front side of the first movable member of the upper plate is pressed, and the first movable member of the upper plate and the first movable member of the lower plate move forward along the moving piece. An expandable intervertebral body fusion prosthesis, characterized in that made so as to.
The method of claim 4,
When the rotating piece rotates and presses the rear side of the second movable member of the top plate,
The second movable member of the lower plate disposed so that the front side of the second movable member of the upper plate is in contact with the front side of the second movable member of the upper plate is pressed, and the second movable member of the upper plate and the second movable member of the lower plate move forward along the coupling piece. An expandable intervertebral body fusion prosthesis, characterized in that made so as to.
A main body including a charging space formed therein, a coupling hole formed in the center of the front surface, an installation hole formed in the center of the rear surface and a threaded portion formed on the inner periphery, and inclined grooves formed on both outer surfaces of the body;
A through-hole formed in the center so as to be movably installed on the upper part of the main body and open in the vertical direction, an inclined piece protruding obliquely from the lower surface of both edges in the longitudinal direction, and a moving member formed in the width direction of the lower surface Including tops;
A through-hole formed in the center so as to be movably installed in the lower part of the main body and open in the vertical direction, an inclined piece protruding obliquely from the upper surface of both edges in the longitudinal direction, and a moving member formed in the width direction of the upper surface Lower plate containing;
It is installed in the charging space of the main body to press the upper and lower plates, and the moving piece coupled to the coupling hole of the main body, the pressing piece extending from the end of the moving piece, and the coupling groove formed in the center of the rear surface of the pressing piece Including center washer; and
Installed in the charging space of the main body to press the upper and lower plates, a coupling piece coupled to the coupling groove of the center washer, and a screw portion extending from the end of the coupling piece and screwed into the installation hole of the main body on the outer periphery. A rotation piece formed thereon, and a center shaft formed in the center of the rear surface of the rotation piece and including a tightening groove in which a screw portion is formed on the inner periphery; including,
Based on the main body, the upper and lower plates are moved in an inclined direction and expanded,
The inclined groove,
A first inclined groove formed on the front side in the longitudinal direction of the main body, and a second inclined groove formed on the rear side spaced apart from the first inclined groove by a predetermined interval, wherein the first and second inclined grooves are formed on the front side. An upper inclined groove inclined downwardly toward the rear, and a lower inclined groove extending from the lower end of the upper inclined groove and inclined upward from the front to the rear so as to be symmetrical to the upper inclined groove,
The inclined piece,
A first slanted piece protruding obliquely from the front of the upper and lower plates in the longitudinal direction toward the rear, and a second slanted piece spaced apart from the first slanted piece at a predetermined interval and protruding obliquely from the front to the rear,
The first and second inclined pieces of the upper plate are coupled to the respective upper inclined grooves of the first and second inclined grooves of the main body, and are moved and expanded in the inclined direction of each upper inclined groove, and the first and second inclined pieces of the lower plate The inclined piece is coupled to each lower inclined groove of the first and second inclined grooves of the main body, and is moved and expanded in the inclined direction of each lower inclined groove,
When the center shaft screwed into the installation hole of the main body is rotated and moved forward, and the center washer coupled to the coupling piece of the center shaft through the coupling groove is pressed and moved forward.
When the rotating piece of the center shaft rotates and presses the rear side of the second movable member of the upper plate, the second movable member of the lower plate disposed so that the rear side abuts against the front side of the second movable member of the upper plate is pressed to move the upper plate. The second movable member and the second movable member of the lower plate move forward, while the second movable member of the upper plate and the second movable member of the lower plate are guided by the coupling piece coupled through the movable hole and move in the vertical direction. The upper and lower plates coupled with the second inclined piece to the upper and lower inclined grooves formed in the second inclined groove of the main body extend while moving in the inclined direction of the upper and lower inclined grooves,
When the pressing piece of the center washer presses the rear side of the first movable member of the upper plate, the first movable member of the lower plate disposed so that the rear side comes into contact with the front side of the first movable member of the upper plate is pressed, and the first movable member of the upper plate is pressed. 1 The moving member and the first moving member of the lower plate move forward, and the first moving member of the upper plate and the first moving member of the lower plate are guided by the moving piece coupled through the moving hole and move in the vertical direction while moving the main body. The upper and lower plates coupled to the upper and lower inclined grooves formed in the first inclined groove by the first inclined pieces are extended while moving in the inclined direction of the upper and lower inclined grooves. joint material.

Images