KR20180122118A - Bone fusion member and implant for intervertebral disk using the same - Google Patents

Abstract

A bone fusion member and an implant for intervertebral disk with the same are provided. The bone fusion member according to an embodiment of the present invention, as a bone fusion member for replacing intervertebral disk embedded in a space between an adjacent first and second vertebrae, includes a body made of a bioactive crystallized glass material, wherein the body has a shape corresponding to a surface shape of each of the first and second vertebrae, and is coupled through a buffer member and a plate for fixing to the first vertebra and the second vertebra, and a groove part for coupling the buffer member is provided on a side surface of the body.

Description

TECHNICAL FIELD [0001] The present invention relates to a bone union member and an implant for replacing the same,

The present invention relates to a bone union member and an implant for replacement of a choroid with the same, and more particularly to a bone union member which can be easily manipulated and improve the synthesis of bone and mechanical stability, and an implant will be.

Generally, the spinal column cartilage and / or spinal vertebrae may be dislocated or damaged due to trauma, illness, degenerative disease, or prolonged wear. The intervertebral cartilage is replaced with an implant, such as a spacer or a cage, to alleviate the disease caused by such dislocation or injury.

However, the conventional implant for intervertebral arch has a complicated structure because it is necessary to form an opening for accommodating the bone graft material in the spacer or the cage in order to solve the low fluidity of the implant material and the bone, There is a problem that the operation is troublesome.

In addition, a bone graft such as a bone graft such as allograft bone, autograft bone or xenograft bone, or a spacer or a cage composed of ceramics, polymer, metal, and biocompatible material has poor mechanical strength due to low compressive strength, .

Moreover, in the case of a conventional stand-alone cage, the processability is not easy and there is a problem of anatomical mismatch between the implant and the spine of each patient.

JP 2013-169465 A (Public date 2013.09.02)

In order to solve the problems of the prior art as described above, one embodiment of the present invention provides a bone union member which can be easily manipulated and improve the synthesis of bone and mechanical stability, and an implant for interbody replacement having the same do.

According to an aspect of the present invention, there is provided a bone union member for replacement of a chord alternate which is embedded in a space between an adjacent first vertebra and a second vertebra. Wherein the body for bodily substitution includes a body made of a bioactive crystalline glass material and the body has a shape corresponding to a surface shape of each of the first and second vertebrae, A plate for fixing to the second vertebra and a buffer member, and a groove for engaging the buffer member is provided on a side surface of the body.

In one embodiment, the body may be manufactured by CAD / CAM or 3D printing based on the medical image information of the patient.

In one embodiment, the body may be provided with a plurality of protrusions on one surface thereof in contact with the first skeleton and the second skeleton, respectively.

In one embodiment, the bioactive glass material may include CaSiO ₃ , apatite, and Ca ₂ Mg (Si ₂ O ₇ ) in a weight ratio of 1: 0.7 to 1.5: 0.5 to 1.2.

According to another aspect of the present invention, there is provided a bony union member as described above; A plate made of titanium (Ti) and fixed to the first vertebra and the second vertebra; And a cushioning member made of polyetheretherketone (PEEK) material and disposed between the bony member and the plate to join the bony member to the plate.

In one embodiment, the implant for intercostal replacement further comprises a first screw for engagement with the first vertebra and a second screw for engagement with the second vertebra, wherein the first screw is received on both sides of the plate, A pair of guide grooves are formed at symmetrical positions of the cushioning members so that the first screw and the second screw are engaged with each other at an angle different from that of the first screw hole and the second screw hole, .

In one embodiment, the plate is provided with a pair of receiving grooves at a central portion between the first receiving hole and the second receiving hole for receiving a locking screw for locking the first screw and the second screw, The pair of receiving grooves may communicate with the first receiving hole and the second receiving hole.

In one embodiment, the buffer member includes: a pair of supports for coupling to the body of the bone union member; And a center portion connecting the pair of supports, and the support portion may be inserted and coupled to the groove portion of the body of the bone union member in a fitting manner.

In one embodiment, the cushioning member is provided with coupling grooves for coupling the plate to both sides of the central portion, and the coupling protrusions corresponding to the coupling grooves may be provided on both sides of the plate.

In one embodiment, the plate may be provided with at least one wedge at a position that is symmetrical with respect to a plane contacting the first vertebra and a surface contacting the second vertebra.

According to one embodiment of the present invention, the bone union member and the interbody implant having the same can be improved in mechanical stability while improving the compatibility with the bone by using a material having high fusion strength and strength.

Further, the present invention can increase the area of the union portion to further promote the fusion with the bone, and can more stably fix the position between the bones.

Also, since the shape corresponding to the surface of the vertebra of the patient can be manufactured based on the patient's image information, the present invention can improve the anatomical shape synthesis of the patient, thereby improving the reliability of the substitute function of the interbody.

Further, according to the present invention, since a buffer member is provided between a brittle union member and a high-strength plate, breakage of the bony member can be suppressed by an external force, and mechanical stability can be further improved.

Further, since the plate has a wedge portion coupled to one side of the vertebra, the plate is directly fixed to the vertebra, so that the implant can be prevented from twisting due to the movement of the patient.

In addition, according to the present invention, since the guide groove is provided in the cushioning member between the plate and the bone union member, the angle of the screw for coupling with the bone can be secured, and the ease of operation can be further improved.

Further, since it is not necessary to provide a separate bone graft material, the present invention facilitates the procedure without the hassle of applying the bone graft material at the time of the procedure, thereby shortening the procedure time and improving convenience for patients and medical staff.

1 is a perspective view of an implant according to an embodiment of the present invention,
Fig. 2 is an exploded perspective view of Fig. 1,
3 is a perspective view of the union member of FIG. 1,
Figure 4 is a perspective view of the plate of Figure 1,
Fig. 5 is a perspective view of the cushioning member of Fig. 1,
FIG. 6 is a perspective view of the implant of FIG. 1,
FIG. 7 is a view showing the use state of the implant for replacement of the chordae according to the embodiment of the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings, which will be readily apparent to those skilled in the art to which the present invention pertains. The present invention may be embodied in many different forms and is not limited to the embodiments described herein. In order to clearly illustrate the present invention, parts not related to the description are omitted, and the same or similar components are denoted by the same reference numerals throughout the specification.

Hereinafter, the implant for replacement of the chordae according to the embodiment of the present invention will be described in more detail with reference to the drawings.

Referring to FIG. 1, the interbody implant 100 according to an embodiment of the present invention includes a bone union member 110, a plate 120, and a buffer member 130.

The interbody implant 100 is used to replace the intervertebral disc such as the intervertebral cartilage, and is embedded in a space between adjacent vertebrae as shown in Fig. Here, the interbody implant 100 can be coupled to the first vertebra 11 by the first screw 140a and to the second vertebra 12 by the second screw 140b.

At this time, the bony union member 110 is embedded between the first and second bones 11 and 12, and the plate 120 is fixed to one end of the first bones 11 and the second bones 12 Can be fixed.

The union member 110 may include a body 110a made of a bioactive crystallized glass material. Here, the bioactive crystallized glass material may include CaSiO ₃ . The biologically active glass material is Ca ₁₀ (PO ₄ ) ₆ A (wherein A is an oxygen atom) and Ca ₁₀ (PO ₄ ) 6 B ₂ (wherein B is a hydroxyl group, a fluorine atom or a chlorine atom). ) And Ca ₂ Mg (Si ₂ O ₇ ). Here, the Sans body active crystallization glass material may include CaSiO ₃ , apatite, and Ca ₂ Mg (Si ₂ O ₇ ) in a weight ratio of 1: 0.7 to 1.5: 0.5 to 1.2.

Since such a bioactive crystallized glass material has a bone fusion characteristic and a high strength, it can effectively replace a defective tissue part of a living body when it is implanted in a living body.

Therefore, since there is no need to provide a separate bone graft material, it is easy to perform the procedure without the hassle of applying the bone graft material at the time of the procedure, thereby shortening the procedure time, thereby improving convenience for patients and medical staff.

The body 110a may have a shape corresponding to the respective surface shapes of the first and second vertebrae 11 and 12. For example, the body 110a may be manufactured by CAD / CAM or 3D printing based on medical image information of the patient. The body 110a may be formed such that the surfaces thereof contacting the first and second vertebrae 11 and 12 are inclined.

Accordingly, the bony union member 110 can be manufactured to be substantially similar to or substantially the same as the bony shape of the patient, thereby minimizing the anatomical mismatch between the vertebrae.

Here, the body 110a may be provided with grooves 111a, 111b, and 111c along the side surfaces thereof, as shown in FIGS. At this time, the support portion 131 of the buffer member 130 may be inserted into the groove portion 111a on both sides of the body 110a.

The center portion 132 of the buffer member 130 is inserted into the groove portion 111b in front of the body 110a and the end of the support portion 131 of the buffer member 130 is inserted into the groove portion 111c at the rear, . That is, the body 110a may be formed by inserting the buffer member 130 into the groove portions 111a, 111b, and 111c and enclosing the buffer member 130.

The bony member 110 can be coupled to the plate 120 for fixing to the first and second vertebrae 11 and 12 through the buffer member 130. [

A plurality of protrusions 112 may be provided on the upper surface and the lower surface of the body 110a, that is, the surfaces contacting the first and second vertebrae 11 and 12, respectively, in one direction. Each of the protrusions 112 may have a predetermined thickness and length from the surface of the body 110a and may be provided at regular intervals from each other.

By this, it is possible to further promote the fusion with the bone by increasing the fusion area to be joined to the first and second vertebrae 11 and 12, and the fusion with the first vertebrae 11 and the second vertebrae 12 can be further promoted, The position of the body 110a between the corrugations can be more stably fixed.

In addition, the projecting portion 112 and the first and second reinforcement ribs 11 and 12 can improve the fixing force of the body 110a by friction between the first and second reinforcement ribs 11 and 12.

The plate 120 includes a body 121 made of titanium (Ti) and is fixed to the first vertebra 11 and the second vertebra 12 by a first screw 140a and a second screw 140b .

The plate 120 may have a first receiving hole 122a for accommodating the first screw 140a and a second receiving hole 122b for accommodating the second screw 140b on both sides of the body 121 have. The first receiving hole 122a and the second receiving hole 122b may be inclined at different angles. That is, since the first screw 140a and the second screw 140b are coupled to the first and second vertebrae 11 and 12 at different angles to each other, as shown in Fig. 7, The first receiving hole 122a and the second receiving hole 122b may be inclined so that the screws 140a and the second screws 140b are different from each other at an angle at which the screws 120a are inserted into the plate 120. [

The first receiving hole 122a and the second receiving hole 122b may be provided with threads for fastening the first screw 140a and the second screw 140b selectively.

The plate 120 also receives a locking screw 129 for locking the first screw 140a and the second screw 140b at a central portion between the first receiving hole 122a and the second receiving hole 122b A pair of receiving grooves 124 may be provided.

Here, the pair of receiving grooves 124 are separated from each other by the partition walls, and a communicating portion 125 communicating with the first receiving hole 122a and the second receiving hole 122b is provided at one side thereof . That is, the pair of receiving grooves 124 and the first receiving holes 122a and the second receiving holes 122b are overlapped with each other so that a part of them are communicated with each other.

This allows the head portion of the locking screw 129 to block a part of the first receiving hole 122a and the second receiving hole 122b in the communicating portion 125 so that the first screw 140a and the second screw 140b may not be released to the outside.

At this time, the locking screw 129 may include a first portion 129a, which is partly inwardly flanked on one side. Here, the first portion 129a may be formed in a shape corresponding to the communicating portion 125. That is, when the locking screw 129 is integrally provided on the plate 120, the first portion 129a is rotated so as to be positioned on the communicating portion 125, whereby the first receiving hole 122a and the second receiving hole The first screw 140a and the second screw 140b can be inserted into the first receiving hole 122a and the second receiving hole 122b without being blocked by the locking screw 129 have.

The plate 120 may be provided with at least one wedge portion 123 at a surface contacting the first vertebra 11 and at a surface contacting the second vertebra 12. 2 and 4, the plate 120 has at least one wedge (not shown) at a position symmetrical to the lower side of the first receiving hole 122a and the upper side of the second receiving hole 122b, A portion 123 may be provided.

Here, the wedge portion 123 may be provided at a position opposite to the fastening direction of the first screw 140a and the second screw 140b. 6, when the first screw 140a is coupled to the upper side of the union member 110, the wedge portion 123 is disposed below the first receiving hole 122a, and the second screw The wedge part 123 can be disposed on the upper side of the second receiving hole 122b when the first receiving part 140b is coupled to the lower side of the union member 110. [

However, it is needless to say that the forming position of the wedge portion 123 can be changed according to the fastening direction of the first screw 140a and the second screw 140b.

The plurality of wedges 123 may be spaced apart from each other by a predetermined distance and may have a pointed tip such that one end thereof is fixed to the first or second vertebrae 11 or 12.

Accordingly, it is possible to suppress or minimize twisting of the intervertebral disc to the intervertebral disc 100, which may occur according to the patient's motion, thereby further improving the structural stability. Therefore, the usable life of the intervertebral disc implant 100 Lt; / RTI >

The plate 120 may have fastening protrusions 127 corresponding to the fastening grooves 135 of the buffer member 130 on both sides. The fastening protrusion 127 may be formed on the back side of the plate 120, that is, on the buffer member 130 side. Here, the fastening protrusion 127 may have one end bent toward the inside of the body 121. That is, the fastening protrusion 127 may be formed in the shape of a letter "A" on the rear surface of the body 121.

Thus, the plate 120 can be coupled to the buffer member 130 by a simple structure. Therefore, since the plate 120 can be formed to have a small thickness, the volume of the plate 120 can be minimized to increase the volume of the bone union member 110, .

The cushioning member 130 is made of polyetheretherketone (PEEK), and is disposed between the bending member 110 and the plate 120 to couple the bending member 110 and the plate 120 together.

The cushioning member 130 is for separating the brittle union member 110 and the metal material plate 120 from each other. When the brittle member 110 and the plate 120 are in direct contact with each other, Can be prevented from being damaged by an external force applied from the first and second support rods (11, 12). Here, the buffer member 130 may include a pair of support portions 131 and a central portion 132.

The pair of supporting portions 131 are for engaging with the body 110a of the bony union member 110 and can be inserted into the groove portion 111a of the body 110a. At this time, one end of the support portion 131 may include a bent portion 133 bent inward. Here, the bent portions 133 may be inserted into both sides of the groove portion 111c of the body 110a of the union member 110. [

The center portion 132 connects between the pair of support portions 131 and can be inserted into the groove portion 111b of the body 110a of the bone union member 110. [

The support portion 131 and the center portion 132 of the buffer member 130 are inserted into the groove portions 111a, 111b and 111c of the union member 110 respectively and can be inserted and coupled in a fitting manner.

A pair of guide grooves 134 are formed on both sides of the center portion 132 so that the first screw 140a and the second screw 140b are coupled to the first and second vertebrae 11 and 12 at a predetermined angle. . That is, since the first screw 140a and the second screw 140b are obliquely connected to the first and second vertebrae 11 and 12 as shown in FIG. 7, The center portion 132 of the buffer member 130 disposed in the buffer member 130 may be interfered with.

In order to solve this problem, a pair of guide grooves 134 may be formed in communication with the first receiving hole 122a and the second receiving hole 122b. At this time, the pair of guide grooves 134 may be disposed at positions symmetrical to each other on both sides of the central portion 132.

That is, the guide groove 134 corresponding to the first receiving hole 122a is disposed on the upper side in the center portion 132, and the guide groove 134 corresponding to the second receiving hole 122b is disposed on the lower side As shown in FIG.

Here, the guide groove 134 may be provided at the same position as the fastening direction of the first screw 140a and the second screw 140b. 6, when the first screw 140a is coupled to the upper side of the union member 110, the guide groove 134 corresponding to the first receiving hole 122a extends from the center 132 to the upper side And when the second screw 140b is coupled to the lower side of the union member 110, the guide groove 134 corresponding to the second receiving hole 122b may be disposed at the lower side of the central portion 132. [

However, the shape of the first receiving hole 122a, the second receiving hole 122b, and the pair of guide grooves 134 may be changed depending on the fastening direction or fastening manner of the first screw 140a and the second screw 140b Of course, be deformed.

The guide groove 134 may be opened upward or downward from the central portion 132. For example, the guide groove 134 may have a hemispherical shape.

This makes it possible to easily assure a variable coupling angle of the first screw 140a and the second screw 140b coupled to the first and second vertebrae 11 and 12.

The buffer member 130 may be provided with a coupling groove 135 for coupling the plate 120 to both sides of the central portion 132. The fastening groove 135 may be formed in a shape corresponding to the fastening protrusion 127 of the plate 120.

For example, the engaging groove 135 may be formed inwardly from one side of the support portion 131 on both sides of the center portion 132, as shown in Figs. 2 and 5. The lower end 135a of the fastening groove 135 may extend from the support 131 so that the lower surface of the fastening protrusion 127 of the plate 120 is supported.

The plate 120 is coupled to the front surface of the cushioning member 130 and the joint member 110 is coupled to the rear surface of the cushioning member 130 so that the plate 120 and the joint unit 110 are spaced apart from each other And can be stably bonded.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

100: Implant 110 for replacing the interbody implant 110: Bone union member
110a: body 111:
112: protrusion 120: plate
121: body 122a: first receiving hole
122b: second receiving hole 123: wedge portion
124: receiving groove 125:
126: screw groove 127: fastening projection
129: Locking screw
129a: first part 130: buffer member
131: support part 132:
133: bending section 134: guide groove
135: fastening groove 140a: first screw
140b: Second screw

Claims (10)

A bone union member for replacement of a trunk inserted in a space between adjacent first and second vertebrae,
Comprising a body made of a bioactive crystalline glass material,
Wherein the body has a shape corresponding to a surface shape of each of the first and second vertebrae,
The body is coupled to the first vertebra and the second vertebra through a cushioning member,
And a groove for engaging the cushioning member is provided on a side surface of the body. The method according to claim 1,
Wherein the body is manufactured by CAD / CAM or 3D printing based on medical image information of a patient. The method according to claim 1,
Wherein the body is provided with a plurality of protrusions in one direction on a surface that is in contact with each of the first and second vertebrae. The method according to claim 1,
Wherein the biologically active crystallized glass material comprises CaSiO ₃ , apatite, and Ca ₂ Mg (Si ₂ O ₇ ) at a weight ratio of 1: 0.7 to 1.5: 0.5 to 1.2. An union member according to any one of claims 1 to 4;
A plate made of titanium (Ti) and fixed to the first vertebra and the second vertebra; And
And a cushioning member made of polyetheretherketone (PEEK) material and disposed between the bony union member and the plate and coupling the bony member to the plate. 6. The method of claim 5,
Further comprising a first screw for engaging the first vertebra and a second screw for engaging the second vertebra,
A first receiving hole for receiving the first screw and a second receiving hole for receiving the second screw are provided on both sides of the plate,
Wherein a pair of guide grooves are provided at symmetrical positions of the cushioning member so that the first screw and the second screw are fastened at different angles. The method according to claim 6,
Wherein the plate has a pair of receiving grooves at a central portion between the first receiving hole and the second receiving hole for receiving a locking screw for locking the first screw and the second screw,
Wherein the pair of receiving grooves communicate with one side of the first receiving hole and the second receiving hole. 6. The method of claim 5,
The cushioning member,
A pair of supports for coupling to the body of the union member; And
And a central portion connecting the pair of supports,
Wherein the support portion is inserted into the groove portion of the body of the bone union member in a fitting manner. 9. The method of claim 8,
Wherein the buffer member is provided with coupling grooves for coupling the plate to both sides of the central portion,
Wherein the plate is provided with fastening protrusions corresponding to the fastening grooves on both sides thereof. 6. The method of claim 5,
Wherein the plate is provided with at least one wedge portion at a position symmetrical to each other on a surface contacting the first vertebra and a surface contacting the second vertebra.

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