CN211131344U

CN211131344U - Bone internal support device

Info

Publication number: CN211131344U
Application number: CN201921477619.6U
Authority: CN
Inventors: 王彩梅
Original assignee: Beijing AK Medical Co Ltd
Current assignee: Beijing AK Medical Co Ltd
Priority date: 2019-09-05
Filing date: 2019-09-05
Publication date: 2020-07-31
Anticipated expiration: 2029-09-05

Abstract

The utility model provides an intraosseous support device, include: the deformable support part comprises a plurality of support plates, the support plates are arranged between the first end part and the second end part and surround to form a hollow structure, the support plates have an initial state of outward bending and an assembly state of straightening, and the support plates can be changed from the second state to the initial state under a preset condition. The technical scheme of the utility model the problem that among the prior art support stick limitation is high, the postoperative effect is unsatisfactory has been solved effectively.

Description

Bone internal support device

Technical Field

The utility model relates to the field of medical equipment, particularly, relate to an intraosseous support.

Background

Early femoral head necrosis, if not treated in time, further progression can lead to collapse of the femoral head, eventually necessitating a total hip replacement. However, since femoral head necrosis occurs more frequently in young and middle-aged patients, it is not appropriate to perform total hip replacement prematurely. Therefore, how to delay the process of femoral head necrosis and prevent femoral head collapse is very important.

Currently, various surgeries based on "core decompression" are clinically effective strategies for treating early stage femoral necrosis. The collapse of the femoral head is finally caused by the fact that the simple core decompression can cause the local stress concentration of the femoral head and the lack of good mechanical support of subchondral bone. Therefore, core decompression in combination with implant support for treatment is currently the primary treatment strategy.

Commonly used implants mainly comprise: autogenous bone, allogeneic bone, artificial bone, metal support bar and the like. The simple implantation of autogenous bone, allogeneic bone or artificial bone has poor supporting effect, and can be gradually absorbed along with the lapse of time, and the long-term effect is not ideal; the metal support rod can provide mechanical support for subchondral bone, but the bone is not well grown, so that the integration and reconstruction of the support rod and surrounding bone tissues are not facilitated, and the long-term effect is poor. And to various improvements of supporting rod, for example the surface design is porous metal, designs for hollow structure can inject medicine etc. though improved bone to a certain extent and has grown into the ability, holistic bone tissue integration reconstruction effect still is not good enough to the supporting rod still has more limitation at present, for example: the support rod has longer length and high hardness, is inconvenient to be used together with other bone growth active fillers, is not easy to cut and take out, greatly increases the difficulty of the future total hip replacement, has high production cost, is not ideal for bone growth, and the like.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing an intraosseous support to support excellent limitation height, the unsatisfactory problem of postoperative effect among the solution prior art.

In order to achieve the above object, the utility model provides an intraosseous supporting device, include: the deformable support part comprises a plurality of support plates, the support plates are arranged between the first end part and the second end part and surround to form a hollow structure, the support plates have an initial state of outward bending and an assembly state of straightening, and the support plates can be changed from the second state to the initial state under a preset condition.

Further, the first end includes an endplate and a plurality of spinous processes disposed on the endplate.

Further, the spinous processes are prism-shaped, and the axes of the plurality of spinous processes are parallel to the end plates and radially arranged.

Further, the end plate is annular.

Further, at least a portion of the spinous process is attached to the end plate.

Further, the second end includes a cylindrical sidewall.

Furthermore, the material of the plurality of support plates is memory alloy.

Furthermore, the material of a plurality of backup pads is nickel titanium alloy.

Further, in the initial state, the outer surfaces of the plurality of support plates are located on the same spherical surface.

Further, a bio-coating is disposed on the outer surface of the support plate.

Use the technical scheme of the utility model, the operator can implant patient's bone with the intraosseous support through a passageway under the assembled condition in, the intraosseous support changes to initial condition after implanting, can realize the support to sclerotin with patient's sclerotin laminating in deformation in-process backup pad, above-mentioned easy operation, stable in structure. Meanwhile, the intra-bone support device has the characteristic of changing from an assembly state to an initial state, and the implantation of the intra-bone support device can be realized only by arranging a passage with a smaller diameter on the bone of a patient, so that the influence of the implantation of the intra-bone support device on the patient is greatly reduced, and the using amount of fillers such as bone cement and the like for filling the passage is further reduced.

Drawings

The accompanying drawings, which form a part of the present application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:

fig. 1 shows a schematic structural view of an embodiment of an intraosseous support according to the present invention in an initial state;

FIG. 2 illustrates a schematic top view of the intraosseous support of FIG. 1;

FIG. 3 shows a schematic cross-sectional view of the intraosseous support of FIG. 1;

FIG. 4 is a schematic structural view of the intraosseous support of FIG. 1 in an assembled state;

FIG. 5 is a schematic diagram illustrating a top view of the intraosseous support of FIG. 4; and

fig. 6 shows a cross-sectional structural schematic of the intraosseous support of fig. 4.

Wherein the figures include the following reference numerals:

10. a first end portion; 11. an end plate; 12. a spinous process; 20. a second end portion; 30. a deformable support portion; 31. and a support plate.

Detailed Description

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

As shown in fig. 1 to 6, the intraosseous support of the present embodiment includes a first end portion 10, a second end portion 20, and a deformable support portion 30. Wherein, deformable support portion 30 includes a plurality of support plates 31, a plurality of support plates 31 are disposed between first end portion 10 and second end portion 20, a plurality of support plates 31 surround to form a hollow structure, a plurality of support plates 31 have an initial state of outward bending and a straight assembly state, where "outward bending" means that they are convex in a direction away from the center line to form a curved surface. The support plate 31 can be changed from the assembled state to the initial state under a predetermined condition.

By applying the technical scheme of the embodiment, an operator can implant the intraosseous support into a bone of a patient in the assembling state shown in fig. 4 through a channel, the intraosseous support changes to the initial state shown in fig. 1 after being implanted, and the support plate 31 can be attached to the bone of the patient to support the bone in the deformation process, so that the operation is simple and the structure is stable. Meanwhile, the intra-bone support device has the characteristic of changing from an assembly state to an initial state, and the implantation of the intra-bone support device can be realized only by arranging a passage with a smaller diameter on the bone of a patient, so that the influence of the implantation of the intra-bone support device on the patient is greatly reduced, and the using amount of fillers such as bone cement and the like for filling the passage is further reduced.

Preferably, the supporting plate 31 of the present embodiment is made of nitinol through a 3D printing technique, and the nitinol is a memory alloy material having a memory property and being capable of returning to an original state under a specific condition after being deformed. In this embodiment, the initial state of the intraosseous support made of nitinol is a lantern-like state, and the support plate 31 is straightened to a cylindrical assembled state in a low-temperature environment. Compared with the initial state, the assembled state greatly reduces the radial size of the intraosseous support, and is beneficial to the intraosseous support to pass through an implantation channel. After the intraosseous stent is implanted into a bone of a patient, the supporting plate 31 can change to an initial state under a certain temperature condition or a certain temperature section along with the temperature rise of the intraosseous stent, so as to be attached to the bone, thereby realizing a supporting effect. In addition, in the process that the supporting plate is changed from the assembling state to the initial state, pressure can be continuously applied to the bone, the growth of the bone is stimulated, and the rehabilitation of a patient is facilitated.

As shown in fig. 2 and 3, the first end portion 10 of the present embodiment includes an end plate 11 and a plurality of spinous processes 12 provided on the end plate 11, and the second end portion 20 is a thin-walled structure having a cylindrical shape. The end plate 11 is circular, and a part of each spinous process 12 is connected to the end plate 11 and the other part is suspended. The support plate 31 is disposed on the end plate 11 and the spinous process 12 extends into the bone mass when the intraosseous support is implanted in the bone to limit movement and rotation of the intraosseous support within the bone.

Preferably, as shown in fig. 2 and 3, the spinous process 12 of the present embodiment has a triangular prism shape, and the axis of the spinous process 12 is parallel to the end plate 11 and is radially arranged such that the tip of the triangular prism faces the bone substance, thereby facilitating the insertion of the spinous process 12 into the bone substance.

Preferably, in the initial state, the outer surfaces of the respective support plates 31 are located on the same spherical surface.

To further promote bone growth in the patient, the support plate 31 of this embodiment is provided with a biological coating, such as an HA coating, on its outer surface to increase biological activity.

From the above description, it can be seen that the above-mentioned embodiments of the present invention achieve the following technical effects:

the operator can implant the intraosseous supporter into the patient's bone under the assembled condition through a passageway, and the intraosseous supporter changes initial state after implanting, and the backup pad can realize the support to sclerotin with patient's sclerotin laminating in deformation process, above-mentioned easy operation, stable in structure. Meanwhile, the intra-bone support device has the characteristic of changing from an assembly state to an initial state, and the implantation of the intra-bone support device can be realized only by arranging a passage with a smaller diameter on the bone of a patient, so that the influence of the implantation of the intra-bone support device on the patient is greatly reduced, and the using amount of fillers such as bone cement and the like for filling the passage is further reduced.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An intraosseous support, comprising:

a first end portion (10), a second end portion (20) and a deformable support portion (30), the deformable support portion (30) comprising a plurality of support plates (31), the plurality of support plates (31) being disposed between the first end portion (10) and the second end portion (20), the plurality of support plates (31) being enclosed to form a hollow structure, the plurality of support plates (31) having an initial state of outward bending and an assembled state of unbent, the support plates (31) being changeable from the assembled state to the initial state under a predetermined condition.

2. The intraosseous support according to claim 1, characterized in that said first end (10) comprises an end plate (11) and a plurality of spinous processes (12) arranged on said end plate (11).

3. Intraosseous support according to claim 2, characterized in that said spinous processes (12) are prismatic, the axis of a plurality of said spinous processes (12) being parallel to said end plate (11) and arranged radially.

4. Intraosseous support according to claim 2, characterized in that said end plate (11) is annular.

5. Intraosseous support according to claim 4, characterized in that at least part of said spinous process (12) is connected to said end plate (11).

6. An intraosseous support according to claim 1, characterized in that said second end portion (20) comprises a cylindrical side wall.

7. The intraosseous support according to claim 1, characterized in that the material of said support plates (31) is a memory alloy.

8. The intraosseous support according to claim 1, characterized in that said plurality of support plates (31) is made of nitinol.

9. Intraosseous support according to claim 1, characterized in that in said initial condition, the outer surfaces of a plurality of said support plates (31) are located on the same spherical surface.

10. Intraosseous support according to claim 1, characterized in that the outer surface of the support plate (31) is provided with a bio-coating.