JP5947351B2 - Vertebral implants that are elastic and automatically expand - Google Patents

Description

The present invention relates to an elastically and automatically expanding vertebral implant that is provided for performing a minimally invasive operation between damaged vertebral bodies, in particular, automatically deploying or deploying with a biasing force, Or, it relates to a vertebral body implant that automatically expands with automatically contracting elasticity.

The vertebral body of the human body is in a state where the vertebral body protrudes beyond the normal intervertebral space due to such factors as age, accident, exercise, long-term poor posture, or occupational injury, and cartilage is degenerated. , Fractures occur. In particular, degenerative vertebral lesions due to aging lead to complications such as malfunctioning of other organs of the body in severe cases. Methods for solving problems such as degenerative cone lesions due to aging of the spinal cord or other malfunctions caused by external forces include transforaminal vertebral fusion or artificial disc replacement Is always seen. However, minimally invasive surgery has advantages such as a small range of damage to the body, quick recovery, and low risk of infections, etc., so it is currently pointing in the direction of surgical development. ing.

  Taiwan Patent Nos. I236368, I4077938, Taiwan Utility Model M426388, M400307, United States Patent Publication Nos. 20130173003 and 20080147193 provide devices for intervertebral implantation. Any of the devices to be inserted into the device has a fixed form or form, and does not have a structure or form that is automatically expanded, elastically expanded, or automatically folded. Therefore, the devices in these patents have a large volume and cannot be applied to minimally invasive surgery.

In addition, the device inserted between the vertebrae disclosed in US Pat. No. 8,241,358, US Patent Publication Nos. 2014/0142858 and 2013/0079883 has a structure and mode that can be expanded or folded using a certain type of operating tool. Have. However, the working tool of the structure or aspect that can be expanded or folded must press or push these devices or parts for the entire stroke, and these devices and parts themselves are automatically expanded. Or unfolded automatically or folded automatically. Therefore, in the operation for implanting these, not only the operation time is lengthened, but also the vertebral body lacks stability because the area for fixing the cone is small. Therefore, it can be said that there is much room for improvement.

Taiwan Patent No. I236368 Taiwan Patent I4077938 Taiwan Utility Model Registration No. M426388 Taiwan Utility Model Registration M400307 United States Patent Publication No. 20130173003 United States Patent Publication No. 20080147193 United States Patent No. 8241358 United States Patent Publication No. 2014/0142858 United States Patent Publication 2013/0079883

  An object of the present invention is to provide a vertebral body implant that is automatically expanded, elastically expanded, or automatically folded to be easy to operate.

Another object of the present invention is to provide a vertebral body implant that is small in volume and has a small range of damaging the body during surgery, and that is elastically and automatically expands.

Therefore, as a result of intensive studies in view of the drawbacks found in the prior art, the present inventor has at least a base portion and both sides of the extending portion, and each extending portion on each side has an end portion and a main body. ,
A vertebral body implant that elastically and automatically expands, comprising: the base portion of the body; and two connecting members housed and provided in the extending portions on both sides,
Each of the connecting members has an end edge portion, and each end edge portion of the main body is connected to the second hinge joint portion and the third hinge joint portion in a hinge joint system, and the main body and each of the connecting members are connected. At least one of them has elasticity and is capable of freely deforming, and when the connecting member moves by a predetermined distance from the base portion of the main body under pressure or tension, the two connecting members Focusing on the point that the problem can be solved by an elastic and automatically expanding vertebral body implant that is configured to be automatically separated from the base portion of the main body by an urging force. Completed.

The present invention will be described below.
The elastic and automatically expanding vertebral body implant according to claim 1, comprising at least a base part and extension parts on both sides, and each extension part on each side having an end part;
A vertebral body implant that elastically and automatically expands, comprising: the base portion of the body; and two connecting members housed and provided in the extending portions on both sides,
Each of the connecting members has an end edge portion, and each end edge portion of the main body is connected to the second hinge joint portion and the third hinge joint portion in a hinge joint system, and the main body and each of the connecting members are connected. At least one of them has elasticity and is capable of freely deforming, and when the connecting member moves by a predetermined distance from the base portion of the main body under pressure or tension, the two connecting members Is configured to be automatically separated from the base portion of the main body by a biasing force.

The elastically automatically expanding vertebral body implant according to claim 2 is such that the connecting member in claim 1 is moved by a predetermined distance by being pressed toward the main body from a position farthest from the base portion. Then, the connecting member is configured to automatically move toward the main body by an urging force.

The elastic and automatically expanding vertebral body implant according to claim 3,
The connecting members in claim 1 each have an L shape or an arc shape.

  The automatically expanding vertebral body implant according to claim 4 is characterized in that the first hinge joint part to which the respective connecting members in claim 1 are connected in a hinge joint manner is connected to the pin contact of the base part of the main body. By being close to the position, each of the connecting members has an integral structure.

The elastic and automatically expanding vertebral body implant according to claim 5,
2. The second hinge joint portion and the third hinge joint portion formed by connecting each connecting member and the extension portion of the main body according to claim 1 by a hinge joint method are close to two outer pin contacts. Each of the connecting members and the main body are integrated with each other.

The elastic and automatically expanding vertebral body implant according to claim 6,
The predetermined distance in claim 1 defines a position where the first hinge joint portion must exceed a straight line passing through the second hinge joint portion and the third hinge joint portion.

The elastic and automatically expanding vertebral body implant according to claim 7,
The main body according to claim 1 is formed with at least one screw hole for screwing or fitting and inserting an operating tool.

The elastically automatically expanding vertebral body implant according to claim 8 forms a serrated surface for increasing frictional force on the outer surface of the main body and the connecting portion in claim 1, respectively. .

The elastic vertebral body implant that automatically expands according to claim 9 forms a convex part for increasing the area supported by the connecting member in claim 1.

The elastically automatically expanding vertebral body implant according to claim 10, wherein at least one of the main body and at least one of the connecting members according to claim 1 enhances flexibility. Is provided.

The elastically automatically expanding vertebral body implant according to claim 11 is provided with at least one elastic structure portion for increasing flexibility in at least one of the main body and the connecting member in claim 1. Thus, the flexibility of the two connecting members is increased.

An elastically automatically expanding vertebral body implant according to claim 12, wherein the at least one vertebral body implant is connected between the two connecting members in a hinge joint manner between the two connecting members in claim 1. A hinge joint member is further included to increase the flexibility of the connecting member.

The vertebral body implant that expands elastically and automatically according to claim 13 is provided in such a manner that the base portion extends from the edge of the extending portion at both ends of the body according to any one of claims 1 to 12. A notch that extends to a position close to the inner stretched portion, and the stretched portion is divided into an inner stretched portion and an outer stretched portion having elasticity, and the upper and lower surfaces of the inner stretched portion each having elasticity are stretched outward. It is made higher than the upper and lower surfaces of the portion, and a resistance force in the reverse direction is generated in the inner extending portion to prevent it from coming off from the cone.

1 is a perspective view of a vertebral body implant that expands elastically and automatically according to the present invention. FIG. FIG. 2 is a plan view of the elastic and automatically expanding vertebral body implant disclosed in FIG. 1. It is local expansion explanatory drawing which showed the hinge joint part in this invention. It is another local expansion explanatory drawing which showed the hinge joint part in this invention. FIG. 2 is a side view of the elastic and automatically expanding vertebral body implant disclosed in FIG. 1. It is explanatory drawing which showed operation which act | operates the connection member in this invention. It is explanatory drawing which showed operation which embeds the vertebral body implant in this invention. It is another explanatory drawing which showed operation which implants the vertebral body implant which expands automatically with elasticity in this invention. It is another explanatory drawing which showed operation which implants the vertebral body implant which expands automatically with elasticity in this invention. It is explanatory drawing which showed operation | movement of the connection member in this invention. It is the perspective view which showed the form which provided the convex part in the connection member in this invention. It is the top view which showed the form which provided the waveform elastic structure part in the connection member in this invention. It is the top view which showed the form which provided the elastic structure part in the connection member in this invention. It is explanatory drawing which showed the form which provided the hinge joint member in the connection member in this invention. It is the other explanatory view showing the form which provided v member in the connecting member in this invention. It is local expansion explanatory drawing which shows the form which provided the buffer space in this invention. It is another local expansion explanatory drawing which shows the form which provided the buffer space in this invention. It is the top view which showed the form which provided the notch part in the connection member in this invention. It is the side view which showed the form which provided the notch part in the connection member in this invention.

The present invention is automatically deployed or folded and has a small volume and is convenient to use. Providing a vertebral implant that is small in volume, has a small range of damage to the body during surgery, and is elastically and automatically expands, which can accelerate recovery;
A body having at least a base portion and extending portions on both sides, and each extending portion on each side has an edge portion;
Two coupling members housed and provided in the base portion of the main body and the extending portions on both sides,
Each of the connecting members has an end edge portion, and each end edge portion of the main body is connected to the second hinge joint portion and the third hinge joint portion in a hinge joint system, and the main body and each of the connecting members are connected. At least one of them has elasticity and is capable of freely deforming, and when the connecting member moves by a predetermined distance from the base portion of the main body under pressure or tension, the two connecting members Is configured to be automatically separated from the base portion of the main body by a biasing force.
In order to explain the structure and features of such an automatically expanding vertebral body implant, a specific example is given and detailed below with reference to the drawings.

As disclosed in FIGS. 1-5, the elastically automatically expanding vertebral implant 1 according to the present invention is a damaged bone of a human bone, in particular a vertebral body as disclosed in FIGS. 7-9. It is suitable for application to minimally invasive surgery. That is, by embedding the vertebral body implant 1, the vertebral body 8 that has been damaged or compressed is supported.

The vertebral body implant 1 includes a main body 10 formed in a curved shape, an arc shape, or an arc shape, and connecting portions 20 and 30.

The main body 10 has a concave shape formed by integrally forming the base portion 11 and the extending portions 12 and 13 at both ends, and the formed concave notch portion is used as the storage chamber 14. Each extending part 12, 13 has an outer edge or edge 15, 16.

The connecting members 20 and 30 are provided in the storage chamber 14 formed by the base portion 11 and the extending portions 12 and 13 of the main body 10. Each of the connecting members 20 and 30 has outer end portions 21 and 31, and the outer end portions 21 and 31 are connected to the end edge portions 15 and 16 of the extending portions 12 and 13 of the main body 10 by a hinge joint method or a pin joint method. Thus, the second hinge joint portion 36 and the third hinge joint portion 37 are formed.

In addition, the connecting members 20 and 30 have inner end portions 22 and 32 and have a substantially L shape, an arc shape, or other shapes. The inner end portion 22 and the inner end portion 32 are connected and connected by a hinge joint method or a pin joint method to form the first hinge joint portion 33.

At least one of the main body 10 and the connecting members 20 and 30 is elastic and has the ability to be freely deformed.

As shown in FIGS. 1, 2 and 4, the inner end portions 22 and 32 of the connecting members 20 and 30 are connected to each other at the position of the first hinge joint portion 33 by a hinge joint method or a pin joint method. Therefore, as shown in FIGS. 1 and 2, when the connecting members 20, 30 are inserted into the storage chamber 14 of the main body 10, the inner end portions 22, 32 of the connecting members 20, 30 have upper end edges at the base portion 11 of the main body 10. Pressed against, touching.

In this case, the first hinge joint 33 connecting member 20, 30 to connect with hinge joint method or pin joint scheme, as disclosed in FIG. 4, or closer to be in contact with the base portion 11, or in contact To do.

Specifically, as disclosed in FIG. 4, the first hinge joint portion 33 in which the inner end portions 22 and 32 of the connecting members 20 and 30 are connected to each other by a hinge joint method or a pin joint method is used as the base of the main body 10. It approaches or comes into contact with the part 11 .

Moreover, the 2nd hinge joint part to which the outer edge parts 21 and 31 of the connection parts 20 and 30 and the edge parts 15 and 16 of the extending | stretching parts 12 and 13 of the main body 10 connect by a hinge joint system or a pin joint system. 36, the third hinge joint 37, as disclosed in FIG. 3, close to the outer side of the extending portion 12, 13 (the edge portions 15, 16) and the connecting sections 20 and 30 (outer end portion 21, 31) In the position.
Therefore, the connecting member 20, 30 and body 10, the first hinge joint 33, the second hinge joint 36 and the third hinge joint 37, the structural manner integrally.

As shown in FIGS. 2, 5, and 6, the main body 10 is formed with a screw hole 17 in either the base portion 11 or the extending portions 12 and 13, and is disclosed in FIGS. In addition, the shaft 91 is used for screwing or insertion.

As shown in FIGS. 7 to 10, when the vertebral body implant 1 described above is used, the vertebral body implant 1 is inserted into the damaged bone of the patient, particularly the cone 80. The shaft 91 of the operating tool 90 is screwed or fitted into the screw hole 17 of the main body 10 and comes into contact therewith, and moves relatively to press or contact one of the connecting members 20 and 30. . For this reason, the connecting members 20 and 30 are pressed and separated from the main body 10.

As shown in FIGS. 6 and 8, the connecting members 20 and 30 move to a dead point D by moving a predetermined distance A away from the position closest to the innermost side of the main body 10 or the folded position by the pressing force. Then, the connecting members 20 and 30 are automatically moved from the main body 10 to the most distant position disclosed in FIG.

Conversely, as disclosed in FIG. 10, the connecting members 20 and 30 are pressed or pressed toward the main body 10 from the most distant position or the operating position disclosed in FIG. 6 and 8 until the dead center D disclosed in FIGS. 6 and 8 is reached, the connecting members 20 and 30 are automatically moved toward the main body 10 by the urging force, and are the innermost or folded as disclosed in FIG. Move to the position where The fulcrum D of the predetermined distances A and B limits the position where the first hinge joint portion 33 must exceed a straight line passing through the second hinge joint portion 36 and the third hinge joint portion 37.

Further, the connecting members 201 and 301 disclosed in FIG. 11 further include convex portions 24 and 34. By having the convex portions 24 and 34, the area supported by the vertebral body implant 1 can be increased.

Moreover, the connection members 202 and 302 disclosed in FIG. 12 can increase the flexibility of the connection members 202 and 302 by including at least one or more corrugated elastic structures 25 and 35.

Further, the connecting members 202 and 302 disclosed in FIG. 13 can increase the flexibility of the connecting members 202 and 302 by including at least one elastic structure portion 250 and 350.

The wave-shaped elastic structure portions 25 and 35 or the elastic structure portions 250 and 350 described above may be provided in the main body 10.

The extending portions 121 and 131 at both ends of the main body 101 disclosed in FIGS. 18 and 19 are formed with cut portions F extending from the end edge portions to positions close to the base portion 111. Therefore, the extending portions 121 and 131 are divided into inner extending portions 1211 and 1311 having elasticity and outer extending portions 1212 and 1312, and the upper and lower surfaces of the inner extending portions 1211 and 1311 having elasticity are respectively the outer extending portions 1212. , 1312 is made higher than the upper and lower surfaces, and therefore, an effect of preventing the inner extending portions 1211 and 1311 from deviating from the cone due to the occurrence of resistance in the reverse direction is obtained.

When the connecting members 20 and 30 are pressed from the position closest to the innermost side of the main body 10 or the folded position and moved by a predetermined distance A and reach the dead point D as disclosed in FIGS. The connecting members 20 and 30 are automatically separated from the main body 10 by the biasing force, and reach the most distant position disclosed in FIG. Therefore, it is not necessary to continue to press the entire stroke until the position closest to the innermost side of the main body 10, the position farthest from the folded position, or the operating position. Further, it is not necessary to continue to push the entire stroke from the farthest position or the operating position to the position closest to the innermost side disclosed in FIG. 7 or the folded position. This should be noted.

The connecting members 20 and 30 automatically leave the main body 10 by the biasing force, reach the most distant position disclosed in FIG. 9 or the operating position, and between the main body 10 and the connecting members 20 and 30, Interbody fusion is performed by filling with bone or other filling material.

Further, by forming saw-like surfaces 18, 19, 28, 29 on the outer surfaces of the main body 10 and the connecting members 20, 30, frictional force with the bone or the vertebral body 80 can be obtained.

Further, as disclosed in FIGS. 14 and 15, the vertebral body implant 1 is further provided with a hinge joint rod or a hinge joint member 40 between the connecting members 203 and 303 so that the connecting members 203 and 303 are flexible. You may make it raise property.

Further, as disclosed in FIG. 16, a circular buffer space 160 may be formed at each pin node position of the second hinge joint portion 36 and the third hinge joint portion 37. Further, as disclosed in FIG. 17, a circular buffer space 330 may be formed at the position of the pin node of the first hinge joint portion 33.

It should be noted that there is no structure or aspect that automatically expands or folds automatically with an elastic biasing force in the current implant. Therefore, any structure that automatically expands or folds automatically with an urging force of elasticity belongs to the category of the present invention and should be protected by intellectual property rights.

The main body 10 and the two connecting members 20 and 30 can be implemented by converting the appearance, shape, or structure of the main body 10 and the two connecting members 20 and 30 to different ones. Therefore, no matter how the appearance, shape, or structure of the main body 10 and the two connecting members 20 and 30 change, all belong to the category of the present invention and should be protected by intellectual property rights.

DESCRIPTION OF SYMBOLS 1 Vertebral body implant 10 Main body 11 Base part 111 Base part 12 Extension part 121 Extension part 1211 Inner extension part 1212 Outer extension part 13 Extension part 131 Extension part 1311 Inner extension part 1312 Outer extension part 14 Storage chamber 15 Edge 16 End edge 160 Buffer space 17 Screw hole 18 Saw-shaped surface 19 Saw-shaped surface 20 Connecting member 201 Connecting member 202 Connecting member 203 Connecting member 21 Outer end 22 Inner end 24 Convex portion 25 Waveform elastic structure 250 Elastic structure 28 Saw-shaped surface 29 Saw-shaped surface 30 Connecting member 301 Connecting member 302 Connecting member 303 Connecting member 31 Outer end portion 32 Inner end portion 33 First hinge joint portion 330 Buffer space 34 Protruding portion 350 Elastic structure portion 36 Second hinge joint portion 37 3rd hinge joint part 40 Hinge joint member 90 Actuating tool 91 Axis A Predetermined distance B Constant distance D dead F incisions

Claims (10)

At least, it includes a base portion and both sides of the extending portion, and the stretching unit comprises an edge portion of each side, generally exhibits a concave, and storage room the base portion and the concave portion is on both sides in the extending portion a main body and, vertebral body planting container to expand automatically in elastic comprising, and two connecting members are provided to be received in the receiving chamber,
Each of the two connecting members has an inner end portion, and the inner end portions are connected to each other by a hinge joint method to form a first hinge joint portion, and the vertebral body implant is folded and the connection is made When the member is housed in the housing chamber of the main body, the first hinge joint portion is provided so as to approach or contact the base portion,
Each of the two connecting members has an outer end , and each outer end has a hinge joint type connection at each end edge of the extending portion and the second hinge joint and the third hinge joint.
The two connecting members and the main body are integrated.
Wherein a main body, wherein the two coupling members, at least one elastic of, comprise the ability to deform itself standing,
When a virtual straight line connecting the second hinge joint part and the third hinge joint part is a predetermined line,
The two pressure or push away from a position close to the connecting member to the base portion of undergoing tension, when the first hinge joint portion moves beyond the predetermined line, the two connecting members is a base Automatically separated from the club by the biasing force
When the two connecting members are pressed or pulled toward the main body from a position away from the base portion, and the first hinge joint portion moves beyond the predetermined line, the two connecting members are A vertebral body implant, wherein the vertebral body implant automatically moves toward the main body by an urging force . The vertebral body implant according to claim 1,
The connecting member vertebral bodies planting container you characterized by exhibiting an L-shaped or arc-shaped, respectively. The vertebral body implant according to claim 1,
Wherein the second hinge joint part and the third hinge joint, respectively, shall be the being located in the portion adjacent to the outer side in the said outer end of said end edges and the connecting member of the extending portion vertebral body planted container. The vertebral body implant according to claim 1,
To the body, the tool engagement or fitting vertebral bodies planting container you, characterized by forming at least one or more threaded holes provided for insertion for operation. The vertebral body implant according to claim 1,
Wherein the outer surface of the body and the connecting member, the vertebral bodies planting charge, and forming a serrated surface to increase their frictional forces. The vertebral body implant according to claim 1,
Vertebral bodies planting container you characterized by forming the protrusions to increase the surface area for supporting each of said coupling member. The vertebral body implant according to claim 1,
Said body and at least one or more corrugated elastic structure portion vertebral bodies planting container you characterized by providing increased flexibility in at least one of said connecting member. The vertebral body implant according to claim 1,
Said body and vertebral body planting you characterized in that to increase the flexibility of the at least one or more of said an elastic structure part two coupling members increase the flexibility in at least one of said connecting member container. The vertebral body implant according to claim 1,
Between the two coupling members further comprises at least one or more of the hinge joint member connected between the two coupling members by a hinge joint system, vertebral bodies, characterized in that to increase the flexibility of the connecting member Implants. In the vertebral body implant according to any one of claims 1 to 9,
Forming a cut portion which extends from the edge portion of the extending portion of both ends of the body to a position adjacent to the base portion,
Said extending portion is divided into an inner extending portion and an outer extending portion comprising a resilient and high than the upper and lower surfaces of the inner extending portion having elasticity above and below the surface of the outer extending portion,
The vertebral bodies planting container you, characterized in that the inner extending portion by generating a reverse resistance prevents departing from the vertebral body.