KR102180834B1 - Disk agglutination prosthesis utilizing bending - Google Patents

Abstract

The present invention relates to an intervertebral disc fusion prosthesis using bending. The intervertebral disc fusion prosthesis using bending according to the present invention relates to an artificial implant interposed between a bone and a bone in order to treat a spinal lesion of a damaged patient, and is spaced apart at a predetermined interval along the axis in the X-axis direction on the XY plane. A plurality of hinge parts provided at the position; And disposed in a symmetrical position with respect to each of the hinges, formed integrally with the hinges, connected to the hinges so as to be able to rotate relative to each other, and in a state of being placed on a flat plane with each other in a tube shape A plurality of folds that pass through the inside of the retractor and are located between the bone and the bone and are approached with each other through the hinge part to form a height corresponding to the width between the bone and the bone in the Y-axis direction on the XY plane It characterized in that it comprises;

Description

Intervertebral disc fusion prosthesis using bending {Disk agglutination prosthesis utilizing bending}

The present invention relates to an artificial implant interposed between a bone and a bone to treat a spinal lesion of a damaged patient, and more particularly, to an intervertebral disc fusion prosthesis using an improved bend structure to minimize the incision of the patient. About.

The intervertebral disc fusion prosthesis is an implant that replaces the original disc or allows the spine to be straightened in order to remove the pain that occurs in the spinal lesion of the injured patient and restore or improve a limited range of motion.

For example, as shown in FIG. 1, the conventional intervertebral disc fusion prosthesis is used up to 8 to 16 mm in height depending on the size of the patient's disc, and the size of the cannula for inserting it is at least Ø 20 mm or more (incision area 25 mm or more) Should be. The surgical operation to remove the cause of the lesion in the affected area is generally sufficient to use a tube retractor of Ø10mm, but an incision of at least twice the size is required to insert the intervertebral disc fusion prosthesis. As the incision area of the affected area increases, the patient's pain increases.

In order to compensate for the shortcomings of the conventional intervertebral disc fusion prosthesis and to enable minimally invasive surgery, a technique such as'a foldable device disposed on the spine' such as Korean Patent Publication No. 10-2010-0139066 has been proposed. However, this technology has been produced in the form of a plurality of segments (connected by assembly after being manufactured separately), and as they are connected to each other by hinges, first, it has resulted in a decrease in assembly efficiency and an increase in manufacturing cost. Despite the concentration of stress on the hinge portion to be connected, the durability of the product was deteriorated as the hinge portion was made relatively thinner than the segmented portion.

As described above, with the development of medical technology, the method of general spinal fusion surgery is changing from conventional open incision surgery to minimally invasive surgery that reduces patient pain and considers aesthetic factors by minimizing the incision range.

In addition, when developing a product for minimally invasive surgery, the disadvantages of the technology disclosed in the above published patent publications are compensated to improve assembly, thereby improving mass production of the product and reducing manufacturing cost, and improving the durability of the product, further enhancing product reliability. The trend of the times to be able to be enhanced should be reflected.

Therefore, the present invention was conceived to solve the above problems, and an object of the present invention is to enable minimally invasive intervertebral disc fusion surgery by minimizing the incision of the patient, and to improve the mass production and durability of the product. It is intended to provide an intervertebral disc fusion prosthesis using a bend that allows it to be made.

The intervertebral disc fusion prosthesis using bending according to the present invention for achieving the above object relates to an artificial implant interposed between a bone and a bone to treat a spinal lesion of a damaged patient, along the axis in the X-axis direction on the XY plane. , A plurality of hinge portions provided at spaced apart positions at a predetermined interval; And disposed in a symmetrical position with respect to each of the hinges, formed integrally with the hinges, connected to the hinges so as to be able to rotate relative to each other, and in a state of being placed on a flat plane with each other in a tube shape A plurality of folds that pass through the inside of the retractor and are located between the bone and the bone and are approached with each other through the hinge part to form a height corresponding to the width between the bone and the bone in the Y-axis direction on the XY plane It characterized in that it comprises;

It is preferable that the hinge portion and the folded portion are integrally formed of a titanium material.

It is preferable that the hinge portion is formed to have a length along the X-axis direction, and a hinge groove that facilitates bending is formed at a portion connected to each of the folded portions.

In the present invention, it is formed long along the X-axis direction on the XY plane, and one end penetrates through any one of a pair of folded parts located at the outermost side with respect to the X-axis direction, and any one fold It is preferable to include a; a guide member located in the folded portion disposed adjacent to the portion, the other end is fixed to any one of the folded portion.

It is also possible that the folded portions employed in an embodiment of the present invention may be configured to include butt portions that are abutted to each other when they are closest to each other.

The intervertebral disc fusion prosthesis using bending according to the present invention having the configuration as described above has a structure that can be folded and unfolded freely, thereby enabling a procedure using an endoscope tube, resulting in good quality according to the minimization of the patient's incision. It is possible to derive the merits of providing medical services of the hospital, and improve the mass productivity of the product by being integrally formed of one material, as well as the part where the stress can be concentrated, the length and thickness suitable for the stress intensity. It can be formed in a variety of ways to have an advantage, which in turn can improve the durability of the product.

1 is a perspective view of an intervertebral disc fused prosthesis using bending according to the prior art.
Figure 2 is a perspective view showing an unfolded state of the intervertebral disc fusion prosthesis using bending according to an embodiment of the present invention.
Figure 3 is a perspective view showing a folded state of an embodiment of the present invention.
Figure 4 is a side view in a folded state of an embodiment of the present invention.
5 to 7 are views for explaining an insertion process into a human body according to an embodiment of the present invention.
Figure 8 is a side view of the intervertebral disc fusion prosthesis using bending according to another embodiment of the present invention.
Figure 9 is a side view of the intervertebral disc fusion prosthesis using bending according to another embodiment of the present invention.

Hereinafter, an intervertebral disc fusion prosthesis using bend according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

Figure 2 is a perspective view showing an unfolded state of the intervertebral disc fusion prosthesis using bending according to an embodiment of the present invention, Figure 3 is a perspective view showing a folded state of an embodiment of the present invention, Figure 4 is a folded state of an embodiment of the present invention Is a side view, and FIGS. 5 to 7 are views for explaining an insertion process into a human body according to an embodiment of the present invention.

As shown in these figures, the intervertebral disc fusion prosthesis 1 using bending according to the present invention relates to an artificial implant interposed between a bone (B) and a bone (B) to treat a spinal lesion of a damaged patient. As a result, it consists of including the hinge portions 10 and the folding portion 20.

The intervertebral disc fusion prosthesis 1 using bending according to the present invention enables minimally invasive surgery by being able to be inserted into the human body through the surgical retractor 50 in the form of a tube, thereby minimizing the incision Helps reduce pain.

In order to derive these advantages, the present invention includes the hinge portions 10 and the folding portions 20 to have a structure in which folding and unfolding is free, and the hinge portions 10 and the folding portions 20 As they are formed integrally, they have a structure with improved assembly properties and durability.

That is, each of the hinge portions 10 is provided at a position spaced apart from each other at a predetermined interval along an axis line in the X-axis direction on the XY plane, as illustrated in FIG. 2.

Each of the folded portions 20 is disposed in a symmetrical position with respect to each of the hinge portions 10, is formed integrally with the hinge portion 10, and is capable of relative rotation to the hinge portion 10 connected.

This foldable part 20, as well as shown in Figs. 2 and 6, passes through the inside of the tube-shaped surgical retractor 50 in a state placed on a flat plane, and passes through the bone (B) and the bone ( B) is located between (opened state of the folded portion), as well as shown in Figs. 3 and 7, by approaching each other with the hinge portion 10 between the bone (B) and the bone (B) By forming a height corresponding to the width in the Y-axis direction on the XY plane, the width between the bone (B) and the bone (B) can be restored to a required degree.

Intervertebral disc fusion prosthesis 1 using bending according to the present invention having the configuration as described above, by integrally forming the hinge portion 10 and the folded portion 20 to be able to rotate relative to each other, in the unfolded state (flat) It can be placed on a flat surface so that it can pass through the surgical retractor 50 in the form of a tube, and after passing through the surgical retractor 50 and interposed between the bone (B) and the bone (B), By being folded to have a height, the narrowed gap between the bone (B) and the bone (B) can be restored to a required degree.

The intervertebral disc fusion prosthesis (1) using such a bend has a structure that is free to be folded and unfolded, thereby enabling a procedure using the surgical retractor 50, resulting in high-quality medical service according to the minimization of the patient's incision. As it is formed integrally with one material, the mass productivity of the product can be improved, as well as the part where the stress can be concentrated is varied to have a length and thickness suitable for the stress intensity. It can be formed so that it leads to an advantage that can improve the durability of the product.

In this embodiment, the hinge portion 10 and the folded portion 20 are suffied to be integrally formed of various materials that are harmless to the human body, but are preferably formed of a titanium material to improve durability.

The hinge part 10 is formed to have a length along the X-axis direction, as well as shown in FIG. 4, and in a portion connected to each of the foldable parts 20, a hinge groove ( 12) is formed.

That is, the hinge part 10 does not simply exhibit the function of the relative rotation axis, but has a stress-bearing structure capable of withstanding the load applied to the bone B by being manufactured to have a certain length and thickness. , In order to enable smooth folding and unfolding with the folded portion 20 by the adoption of the stress-bearing structure, the hinge groove 12 is formed in the connection portion with the folded portion 20.

In the present invention, it is preferable that the folded portions 20 include a guide member 30 for guiding the folding of the folded portions 20 so that the folded portions 20 can be smoothly folded in a state as shown in FIG. 2 to FIG. 3. .

The guide member 30 is formed to be elongated along the X-axis direction on the XY plane, and as well shown in FIG. 4, a pair of folded portions having one end located at the outermost side with respect to the X-axis direction ( 20), which penetrates through any one of the folded portions 20, is located in the folded portion 20 disposed adjacent to the one of the folded portions 20, and the other end is the one of the folded portions 20 ) Is fixed.

In this embodiment, as a configuration for fixing between the other end of the guide member 30 and the folded portion 20, a binding hole 22 provided in the other one of the pair of folded portions 20 and A locking nut 40 fastened to the guide member 30 passing through the binding hole 22 was employed.

That is, in the binding hole 22 of the other foldable part 20, the guide member 30 passing through the foldable part 20 passes through, and the guide member 30 By fastening the locking nut 40, the guide member 30 and the folded portion 20 are bound together, and the intervertebral disc fusion prosthesis 1 using the bend according to the present embodiment by this binding In the folded state as shown in Figure 7 can be maintained.

In the above, the intervertebral disc fusion prosthesis 1 using a bend according to an embodiment of the present invention has been described. In the drawings, reference numeral P denotes a pressing member for forming a folded structure by pressing the intervertebral disc fusion prosthesis 1 using bending according to the present embodiment.

On the other hand, Figure 8 is a side view of the intervertebral disc fusion prosthesis using bending according to another embodiment of the present invention.

The embodiment shown in this figure is configured to have a butt portion 72 that is abutted when the folded portions 70 are closest to each other, and between the butt portions 72 and the hinge portion 60 , It has a structure in which a deformation allowable groove 74 is formed to enable folding and unfolding of the butt portions 72 with respect to the hinge portion 60.

This embodiment having such a configuration is configured so that the butt portions 72 of each of the folded portions 70 are butted to each other when the folded portion is in a folded state as shown in FIG. 7, so that it is perpendicular to the folded portion 70 through the bone. By making the flexural strength against the load applied by the machine more excellent, it derives the merit of further improving the durability of the product.

In addition, in this embodiment, the folded portions 70 have a structure including a connection portion 80 positioned between the butt portion 72 and the hinge portion 60 to connect the two elements to each other.

The connecting portion 80 adopted in this embodiment includes a first connecting portion 82 having a round shape on an outer surface, and a second connecting portion 84 having a center of curvature formed on the opposite side to the first connecting portion 82. By doing so, the strength against the load applied vertically through the bone is more excellent.

9 is a side view of an intervertebral disc fusion prosthesis using bending according to another embodiment of the present invention.

In the embodiment shown in this figure, when the Y-axis height of the space between the bone and the bone is formed differently from each other, the folds 90 are configured to have different lengths so that they can correspond to the Y-axis height of the space. do.

As described above, according to the present embodiment, the hinge portion and the folded portion are integrally formed of a single material, but by making the folded portions 90 have different lengths, active treatment is performed in response to different lesions of the patient. The advantage that makes it possible is expected.

Although various embodiments of the present invention have been described above, the present embodiment and the accompanying drawings are merely illustrative of some of the technical ideas included in the present invention, and are included in the specification and drawings of the present invention. It will be apparent that all modified examples and specific embodiments that can be easily inferred by a person skilled in the art within the scope of the technical idea are included in the scope of the present invention.

1: Intervertebral disc fusion prosthesis using bending
10: hinge part 12: hinge groove
20: folding part 22: binding hole
30: guide member 40: locking nut
50: surgical retractor 60: hinge
70: folded part 72: butted part
74: deformation allowable groove 80: connection
82: first connection 84: second connection
90: folded portion B: bone
P: Pressurized member

Claims (8)

delete delete delete delete delete It relates to an artificial implant interposed between a bone and a bone to treat a spinal lesion of a damaged patient,
A plurality of hinge portions provided at positions spaced apart from each other at a predetermined interval along an axis line in the X-axis direction on the XY plane; And disposed in a symmetrical position with respect to each of the hinges, formed integrally with the hinges, connected to the hinges so as to be able to rotate relative to each other, and in a state of being placed on a flat plane with each other in a tube shape A plurality of folds that pass through the inside of the retractor and are located between the bone and the bone and are approached with each other through the hinge part to form a height corresponding to the width between the bone and the bone in the Y-axis direction on the XY plane It is made including ;,
The foldable portions are formed including butt portions that are butted to each other when they are closest to each other,
An intervertebral disc fusion prosthesis using bend, characterized in that a deformation allowable groove is formed between the butt portions and the hinge portion to allow folding and unfolding of the butt portions with respect to the hinge portion. The method of claim 6,
The foldable portions include a connecting portion positioned between the butt portion and the hinge portion to connect the two elements to each other,
The connection portion, the intervertebral disc fusion prosthesis using bending, characterized in that the outer surface comprises a first connector having a round shape and a second connector having a center of curvature formed on a side opposite to the first connector. The method of claim 6,
The folded portions have different lengths so as to correspond to the Y-axis height of the space when the Y-axis heights of the space between the bones and the bones are different from each other, the intervertebral disc fusion beam using bending Brother.

Images