CN109363804B

CN109363804B - Anchoring device

Info

Publication number: CN109363804B
Application number: CN201811447777.7A
Authority: CN
Inventors: 王彩梅
Original assignee: Beijing AK Medical Co Ltd
Current assignee: Beijing AK Medical Co Ltd
Priority date: 2018-11-29
Filing date: 2018-11-29
Publication date: 2021-04-30
Anticipated expiration: 2038-11-29
Also published as: CN109363804A

Abstract

The invention provides an anchoring device comprising: an anchor sheet comprising a microporous structural layer; and an anchoring claw provided on an inner surface of the anchor plate. The technical scheme of this application has effectively solved the relatively poor problem of fixed effect of granule bone and soft tissue among the prior art.

Description

Anchoring device

Technical Field

The invention relates to the technical field of medical instrument design, in particular to an anchoring device.

Background

The main methods for the reconstruction of bone defects are granular bone and structural bone grafts. The particle bone transplantation is mainly used for reconstructing acetabulum-containing bone defects and bone grafting in femoral bone marrow cavities, and the particle bone grafting plays roles of filling and supporting. New blood vessels can grow faster between trabeculae and between particulate bones. The new bone formation is preceded by bone resorption, and the mechanical strength of the bone grafting area is continuously increased. In the process of implanting the granular bone, a pressing bone grafting technology is often used, and the clinical effect generally reaches more than 90 percent of 10-year survival rate. After the particulate bone is transplanted, the particulate bone needs to be well covered and wrapped, and at present, no good technology is provided for solving the problem, so that the particulate bone is often covered by a steel plate to form over-operation treatment.

In addition, ligament attachment points are cut off during joint replacement, or fascia, muscles and ligaments around limbs and joints are excessively twisted and pulled due to diseases or indirect violence, so that damage or tearing of the ligaments can be caused, and ligament ends are required to be fixed in an enhanced mode. At present, soft tissue and bone are generally reconnected clinically by a suture anchor embedded in bone to fix torn tendon tissue for tendon bone healing. The suture anchor embodies a mode of fixing by tightening tendons with suture, and the long-term effect is not ideal.

Disclosure of Invention

The invention aims to provide an anchoring device to solve the problem that the fixing effect of the granular bone and the soft tissue is poor in the prior art.

In order to achieve the above object, the present invention provides an anchoring device comprising: an anchor sheet comprising a microporous structural layer; and an anchoring claw provided on an inner surface of the anchor plate.

Further, the anchor sheet also includes a substrate layer, the microporous structure layer being disposed inside the substrate layer.

Further, the surface of the substrate layer away from the microporous structure layer is a polished surface.

Further, both the cross-section and the longitudinal section of the anchor sheet are of an arc-shaped configuration.

Further, the anchor plate and the anchoring claw are both made of absorbable material, or the anchoring claw is made of memory alloy.

Further, the edges of the anchor sheet define a planar shape that is elliptical or rectangular.

Further, a positioning groove is provided on a surface of the anchor plate away from the anchoring claw.

Furthermore, the positioning grooves are multiple and are arranged at intervals along the length direction of the anchor plate.

Further, the anchoring device also comprises a fixing cable, and the fixing cable is matched with the positioning groove.

Further, the anchor sheet is formed of a microporous structural layer having a thickness of between 1mm and 3.5 mm.

Further, the anchor plate comprises a substrate layer and a microporous structure layer, the thickness of the anchor plate is between 3mm and 6mm, and the thickness of the microporous structure layer is between 1.5mm and 3 mm.

Further, the center line of the anchoring claw is a convex arc line.

Further, the anchoring claw extends in a direction approaching the anchor plate to a direction away from the anchor plate with gradually contracting, and an end of the anchoring claw away from the anchor plate forms a tip.

Furthermore, anchoring claw includes first segmental arc and the second segmental arc that is located first segmental arc inboard in its longitudinal section, and the first end of first segmental arc and second segmental arc all is connected with the anchor plate, and the second end of first segmental arc and second segmental arc intersects in a point and forms the pointed end.

Furthermore, the height H of the anchoring claw penetrating out of the microporous structure layer is 5mm-10mm, the maximum distance T between the first arc section and the tip is 5mm-10mm, and the maximum distance T between the second arc section and the tip is 1mm-5 mm.

By applying the technical scheme of the invention, the anchor plate comprises a microporous structure layer. An anchoring claw is disposed on an inner surface of the anchor plate. In the present application, the anchor plate and the anchor claw fix the soft tissue or the granular bone on the bone bed, and restrict the soft tissue or the granular bone from coming loose outside the bone bed, and further, the anchor plate can fix the soft tissue or the granular bone on the bone bed. In the application, the microporous structural layer has good osseointegration and also has good soft tissue and particle osseointegration capability.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, 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 perspective schematic view of an embodiment of an anchoring device according to the invention;

FIG. 2 shows a cross-sectional view through C-C of the anchoring device of FIG. 1;

FIG. 3 shows a cross-sectional view E-E of the anchoring device of FIG. 1;

FIG. 4 shows a schematic cross-sectional view of the anchoring device of FIG. 1 in the fixation of soft tissue;

FIG. 5 shows a schematic cross-sectional view of the anchoring device of FIG. 1 in the position of securing the particulate bone;

figure 6 shows a schematic perspective view of the anchoring device and fixing cable of figure 1 in cooperation;

FIG. 7 shows a schematic cross-sectional view of two of the anchoring devices of FIG. 1 secured to soft tissue on either side of a bone bed; and

fig. 8 shows a perspective schematic view of another embodiment of an anchoring device according to the invention.

Wherein the figures include the following reference numerals:

10. a bone bed; 20. an anchor sheet; 21. a substrate layer; 211. polishing the surface; 212. a positioning groove; 22. an anchoring claw; 221. a first arc segment; 222. a second arc segment; 223. a tip; 23. a microporous structure layer; 30. fixing a cable; 40. soft tissue; 40a, granular bone.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

The relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

As shown in fig. 1 to 4, the anchoring device of the present embodiment includes: the anchor plate 20 includes a substrate layer 21 and a microporous structure layer 23 disposed inside the substrate layer 21. The anchoring claws 22 are provided on the inner surface of the anchor plate 20, and specifically, the anchoring claws 22 are provided on the inner surface of the substrate layer 21.

By applying the technical solution of this embodiment, the anchor plate 20 includes a substrate layer 21 and a microporous structure layer 23 disposed inside the substrate layer 21. The microporous structural layer 23 has good integration ability of the soft tissue 40 and the particulate bone 40 a. The anchoring claws 22 are provided on the inner surface of the anchor plate 20. As shown in FIGS. 5 and 6, in the present embodiment, the anchor plate 20 and the anchoring claws 22 fix the soft tissue 40 or the particulate bone 40a to the bone bed 10, and restrict the soft tissue 40 or the particulate bone 40a from coming loose out of the bone bed 10. Further, the anchor plate 20 can fix the soft tissue 40 or the particulate bone 40a on the bone bed 10. The structure is simple and convenient to use. In the present embodiment, the microporous structural layer 23 has better osseointegration and also has good integration ability of the soft tissue 40 and the particulate bone 40 a. It should be noted that: the inner surface of the anchor plate 20 is the side facing the bone bed.

The microporous structure layer 23 and the substrate layer 21 may be obtained by 3D printing. The microporous structure layer 23 forms a plurality of pores, similar to the trabecular bone structure of the related art. Trabecular bone in the related art is an extension of cortical bone within cancellous bone, i.e., trabecular bone is connected to cortical bone. It has irregular three-dimensional net structure in the cavity of bone sponge, such as loofah sponge-like or spongy, and has the function of supporting hematopoietic tissues.

As shown in fig. 5 and 6, in this embodiment, in order to prevent contusion of soft tissue on the bone bed 10, the surface of the substrate layer 21 away from the microporous structure layer 23 is a polished surface 211.

As shown in FIGS. 5 and 7, in order to allow the anchor plate 20 to fit over the bone bed 10 and facilitate the fixation of soft tissue 40, both the cross-section and the longitudinal section of the anchor plate 20 are arcuate in configuration.

As shown in fig. 2 and 3, the substrate layer 21 and the anchoring claws 22 are both made of an absorbable material. The substrate layer 21 and the anchoring claws 22 are preferably made of magnesium alloy. In this way, fusion between the lamina layer 21 and the anchoring claws 22 and the soft tissue 40 or the particulate bone 40a is facilitated, facilitating healing of the bone bed 10.

In other embodiments, the anchoring claw 22 is made of a memory alloy. Thus, when the anchoring claw 22 is implanted into the bone bed 10, the shape of the anchoring claw 22 is deformed under the change of temperature, so that the anchoring claw 22 is more closely fused with the bone bed 10. Further, the soft tissue 40 and the granulated bone 40a fixed by the anchor plate 20 have a better integration effect.

As shown in FIG. 1, in the present embodiment, for ease of shaping the anchor sheet 20, the edges of the anchor sheet 20 define a planar shape that is rectangular, and more particularly, a rounded rectangular shape. Preferably, the rectangle has a length dimension B of 15mm to 30mm and a width dimension A of 10mm to 20 mm.

As shown in FIG. 8, in other embodiments, the edges of the anchor sheet 20 define a planar shape that is elliptical. Preferably, the dimension B1 of the major axis of the ellipse is 20mm to 40mm and the dimension A1 of the minor axis is 10mm to 20 mm.

As shown in fig. 1 to 3, in order for the fixing device to be wound on the surface of the anchor plate 20, a positioning groove 212 is provided on the surface of the anchor plate 20 remote from the anchoring claws 22.

As shown in fig. 1 to 3, in the present embodiment, the positioning grooves 212 may be provided in three for the convenience of winding, the three positioning grooves being provided at intervals in the length direction of the anchor sheet 20. In other embodiments not shown in the figures, the number of positioning grooves on the anchor sheet is not limited to three, but may also be two, four, and more.

In other embodiments, as shown in FIG. 8, the number of detents is two, and the detents are spaced between the anchoring claws 22 on the surface of the anchor plate 20 remote from the anchoring claws 22. Thus, the positioning groove does not weaken the strength of the anchor sheet 20 itself.

As shown in fig. 6 and 7, the anchoring device further comprises a fixing cable 30, and the fixing cable 30 is fitted into the positioning groove 212. The fixation cable 30 is preferably a wire rope so that the anchoring device becomes more securely fixed to the bone bed 10.

As shown in FIGS. 2 and 3, in the present embodiment, when the anchor sheet 20 is implanted in a region with a large bearing force, such as the lower limbs of the human body, the anchor sheet 20 needs a certain structural strength to prevent the anchor sheet 20 from being damaged by a large external force. The anchor sheet 20 includes a substrate layer 21 and a microporous structural layer 23, the thickness of the anchor sheet 20 is between 3mm and 6mm, and the thickness of the microporous structural layer 23 is between 1.5mm and 3 mm.

As shown in fig. 1, in the present embodiment, the number of the anchoring claws 22 is four, and the anchoring claws 22 are arranged at intervals on the side of the anchor sheet 20 facing the microporous structure layer 23. The anchoring claws 22 may press the particulate bone 40a or soft tissue 40 against the desired attachment location of the bone bed 10. The particulate bone 40a or soft tissue 40 is located between the plurality of anchoring claws 22. In other embodiments not shown in the figures, the number of anchoring claws 22 may be two, three, five and more.

As shown in fig. 2, 4 and 5, the center line of the anchoring claw 22 is a convex arc. Because the anchoring claw 22 is curved, there is a greater resistance to extraction if the anchoring claw 22 is extracted from the bone bed 10. Further, the anchoring claws 22 have an effect of resisting the pullout of the bone bed 10. In this way, the anchoring claws 22 can firmly press the particulate bone 40a and the soft tissue 40 at the desired attachment positions.

As shown in fig. 2, 4 and 5, the anchoring claw 22 extends gradually contractively in a direction approaching the anchor plate 20 to away from the anchor plate 20, and an end of the anchoring claw 22 away from the anchor plate 20 forms a pointed end 223. The tip 223 facilitates fixation with the bone bed 10.

As shown in fig. 2 and 3, the anchoring claw 22 includes a first arc section 221 and a second arc section 222 located inside the first arc section 221 in a longitudinal section thereof, first ends of the first arc section 221 and the second arc section 222 are connected to the anchor plate 20, and second ends of the first arc section 221 and the second arc section 222 intersect at a point to form a tip 223. The radius of the first arc 221 is preferably about 38.81mm at R1, and the radius of the second arc 222 is preferably about 53.31mm at R2, so that the shape of the first arc 221 and the shape of the second arc 222 are more standardized, and thus the anchoring claw 22 is easily implanted into the bone bed 10, and has a great resistance to the bone bed 10 being pulled out.

As shown in fig. 2, the height H of the anchoring claw 22 penetrating out of the microporous structure layer 23 is 5mm to 10mm, the maximum distance T between the first arc section 221 and the tip 223 is about 5mm to 10mm, and the maximum distance T between the second arc section 222 and the tip 223 is about 1mm to 5 mm. Thus, when the anchoring claw 22 is implanted into the bone bed 10, the first arc-shaped section 221 and the second arc-shaped section 222 are ensured to be still bent in the bone bed 10, and the capability of the anchoring claw 22 to resist being pulled out of the bone bed 10 is ensured.

In the embodiment not shown in the figures, the substrate layer may not be provided, and only the microporous structure layer may be provided. When the anchoring device is implanted in a region with a small bearing force, such as the upper limbs of the human body, the connection strength of the anchoring plate 20 is suitably reduced. At this time, the anchor stud is formed of the microporous structure layer. Of course, the thickness of the microporous structure layer is between 1mm and 3.5mm in view of processing problems and securing a certain strength.

In the description of the present invention, it is to be understood that the orientation or positional relationship indicated by the orientation words such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc. are usually based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and in the case of not making a reverse description, these orientation words do not indicate and imply that the device or element being referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore, should not be considered as limiting the scope of the present invention; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.

Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and the terms have no special meanings unless otherwise stated, and therefore, the scope of the present invention should not be construed as being limited.

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 anchoring device, comprising:

an anchor sheet (20) comprising a microporous structural layer (23);

an anchoring claw (22) provided on an inner surface of the anchor plate (20), a center line of the anchoring claw (22) being a convex arc line,

wherein, the end of the anchoring claw (22) far away from the anchoring plate (20) forms a tip (223), the anchoring claw (22) comprises a first arc section (221) and a second arc section (222) positioned at the inner side of the first arc section (221) in the longitudinal section, the first ends of the first arc section (221) and the second arc section (222) are connected with the anchoring plate (20), the second ends of the first arc section (221) and the second arc section (222) are intersected at a point to form the tip (223), wherein the tip (223) is positioned at the inner side of the edge of the anchoring plate (20), the tip (223) is positioned at the inner side of the first arc section (221), and the tip (223) is positioned at the inner side of the first end of the second arc section (222).

2. The anchoring device of claim 1, wherein the anchor plate (20) further comprises a substrate layer (21), the microporous structural layer (23) being disposed inside the substrate layer (21).

3. An anchoring device as defined in claim 2, wherein the surface of said substrate layer (21) remote from said microporous structural layer (23) is a polished surface (211).

4. Anchoring device according to claim 1, characterised in that the cross-section and the longitudinal section of the anchoring plate (20) are both arc-shaped structures.

5. Anchoring device according to claim 1, characterized in that said anchoring plate (20) and said anchoring claw (22) are both made of absorbable material, or in that said anchoring claw (22) is made of memory alloy.

6. Anchoring device according to claim 1, characterized in that the surface of the anchoring plate (20) remote from the anchoring claw (22) is provided with a positioning groove (212).

7. An anchoring device according to claim 6, further comprising a fixing cable (30), said fixing cable (30) being adapted to said positioning groove (212).

8. Anchoring device according to claim 1, characterised in that the anchoring sheet (20) is formed by the microporous structural layer (23), the thickness of the microporous structural layer (23) being between 1mm and 3.5 mm.

9. Anchoring device according to claim 2, characterized in that the anchoring plate (20) comprises the substrate layer (21) and the microporous structural layer (23), the thickness of the anchoring plate (20) being between 3mm and 6mm, the thickness of the microporous structural layer (23) being between 1.5mm and 3 mm.

10. Anchoring device according to claim 1, characterized in that the anchoring claw (22) extends convergent in a direction approaching the anchoring plate (20) to moving away from the anchoring plate (20).