CN112245069A

CN112245069A - Cartilage prosthesis

Info

Publication number: CN112245069A
Application number: CN202011312273.1A
Authority: CN
Inventors: 孟德松
Original assignee: Beijing AK Medical Co Ltd
Current assignee: Beijing AK Medical Co Ltd
Priority date: 2020-11-20
Filing date: 2020-11-20
Publication date: 2021-01-22
Anticipated expiration: 2040-11-20
Also published as: CN112245069B

Abstract

The invention provides a cartilage prosthesis comprising: a substrate; a cartilage portion provided on the base; the adjusting structure is arranged between the base body and the cartilage portion, and the adjusting structure can adjust the distance between the base body and the cartilage portion. The technical scheme of the application effectively solves the problem that the soft prosthesis in the related technology can not be perfectly combined with the surrounding cartilage after being implanted, and the using effect of a patient is poor.

Description

Cartilage prosthesis

Technical Field

The invention relates to the technical field of medical instruments, in particular to a cartilage prosthesis.

Background

The free movement of the human body is caused by the existence of a large number of joint 'kinematic pairs', any movable joint has articular cartilage, and the articular cartilage needs to be repaired in time after being diseased. However, the thickness and size of different articular cartilages are different, and therefore, the design of cartilage prostheses is also different. When the cartilage prosthesis is implanted, the cartilage prosthesis needs to be positioned to a proper position, the height of the cartilage is equal to that of the surrounding healthy cartilage, the cartilage is not sunken or protruded, accurate replacement of the cartilage is realized, and the normal activity of the joint can be recovered.

In the related art, the cartilage prosthesis has only one fixed position after being implanted, which may make the cartilage prosthesis unable to be effectively combined with surrounding cartilage tissue. Therefore, the soft body prosthesis can be used less effectively by the patient after being implanted.

Disclosure of Invention

The main objective of the present invention is to provide a cartilage prosthesis, so as to solve the problem that the soft prosthesis in the related art cannot be perfectly combined with the surrounding cartilage after being implanted, and the usage effect of the patient is poor.

In order to achieve the above object, the present invention provides a cartilage prosthesis comprising: a substrate; a cartilage portion provided on the base; the adjusting structure is arranged between the base body and the cartilage portion, and the adjusting structure can adjust the distance between the base body and the cartilage portion.

Furthermore, adjust the structure including adjusting the post and with adjusting post complex screw hole, the side of adjusting the post is provided with the external screw thread with screw hole complex, adjusts one setting in post and screw hole on cartilage portion, and another setting is on the base member.

Further, adjust the post setting on cartilage portion, the inside of adjusting the post is provided with the through-hole, and cartilage portion includes the cartilage body and by the downward convex first erection column of cartilage body, and first erection column inserts to the through-hole in.

Furthermore, the through hole is a taper hole, the first mounting column is tapered, and the through hole is in plug-in fit with the first mounting column.

Furthermore, the cartilage body is provided with an installation groove surrounding the outer side of the first installation column, and part of the structure of the adjusting column is located in the installation groove.

Further, a locking piece is arranged between the base body and the adjusting column, and the locking piece locks the relative position between the adjusting column and the base body.

Furthermore, a plurality of through grooves are formed in the outer side wall of the adjusting column at intervals, the extending direction of each through groove is parallel to the axis of the adjusting column, the upper surface of the base body is provided with an installation part, and the locking piece is installed in the corresponding through groove and the installation part.

Further, the locking piece includes first gag lever post and the second gag lever post that is the contained angle setting, and the installation department includes the mounting groove, and first gag lever post is installed in leading to the inslot, and the second gag lever post is located the mounting groove.

Further, the locking piece still includes the second erection column, and first gag lever post, second gag lever post and second erection column connect gradually, and the installation department still includes the mounting hole, and the diameter of mounting hole is greater than the groove width of mounting groove, mounting groove and mounting hole intercommunication, and the second erection column is located the mounting hole.

Furthermore, the depth of the mounting hole is larger than that of the mounting groove, and the mounting hole is a tapered hole.

Further, be provided with the arc wall on the base member, the extending direction of arc wall is parallel with the axis of base member, arc wall and mounting groove intercommunication, the opening of arc wall is towards the screw hole, and the groove depth that leads to the groove is greater than the groove depth of arc wall.

By applying the technical scheme of the invention, the cartilage part is arranged on the base body, and the adjusting structure is arranged between the base body and the cartilage part. By adjusting the effect of the structure, the distance between the cartilage portion and the base body can be changed. After the cartilage prosthesis is implanted, the adjustment of the distance between the cartilage part and the base body is realized by adjusting the adjusting structure, so that the cartilage part can be better contacted with cartilage tissues, and thus, the using effect of the implanted cartilage prosthesis can be effectively improved. Therefore, the technical scheme of the application effectively solves the problem that the soft prosthesis in the related technology cannot be perfectly combined with the surrounding cartilage after being implanted, and the use effect of a patient is poor.

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 schematic cross-sectional view of an embodiment of a cartilage prosthesis according to the present invention;

FIG. 2 shows a schematic perspective view of the adjustment structure of the cartilage prosthesis of FIG. 1;

FIG. 3 shows a schematic top view of the adjustment structure of FIG. 2;

FIG. 4 shows a schematic perspective view of the matrix of the cartilage prosthesis of FIG. 1;

FIG. 5 shows a close-up view of the substrate of FIG. 4 at A;

FIG. 6 shows a schematic perspective view of the base and adjustment structure of the cartilage prosthesis of FIG. 1;

fig. 7 shows a schematic perspective view of the cartilaginous part of the cartilaginous prosthesis of fig. 1;

fig. 8 shows a schematic perspective view of the locking element of the cartilage prosthesis of fig. 1;

FIG. 9 shows a schematic front view of the adjustment post and locking element of the cartilage prosthesis of FIG. 1;

FIG. 10 shows a schematic top view of the adjustment post and locking member of FIG. 9; and

fig. 11 shows a schematic perspective view of the cartilage prosthesis of fig. 1.

Wherein the figures include the following reference numerals:

10. a substrate; 11. an installation part; 111. mounting grooves; 112. mounting holes; 12. an arc-shaped slot; 13. a first stage; 14. a second stage; 15. a first arcuate transition section; 16. a second arcuate transition section; 20. a cartilage portion; 21. a cartilage body; 211. installing a groove; 22. a first mounting post; 30. an adjustment structure; 31. an adjustment column; 311. an external thread; 312. a through hole; 313. a through groove; 32. a threaded hole; 40. a locking member; 41. a first limit rod; 42. a second limiting rod; 43. a second mounting post.

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.

In order to adjust the distance between the cartilage portion and the base body, as shown in fig. 1, 2, 3, 6 and 11, in the present embodiment, the cartilage prosthesis includes: a base body 10, a cartilage portion 20 and an adjustment structure 30. The cartilage portion 20 is provided on the base 10. The adjustment structure 30 is disposed between the base body 10 and the cartilage portion 20, and the adjustment structure 30 is capable of adjusting a distance between the base body 10 and the cartilage portion 20.

With the solution of the present embodiment, the cartilage portion 20 is disposed on the base body 10, and the adjustment structure 30 is disposed between the base body 10 and the cartilage portion 20. By the action of the adjustment structure 30, the distance between the cartilage portion 20 and the base body 10 can be varied. After the cartilage prosthesis is implanted, the adjustment structure 30 is adjusted to further adjust the distance between the cartilage part 20 and the matrix 10, so that the cartilage part 20 can be better contacted with cartilage tissues, and the using effect of the implanted cartilage prosthesis can be effectively improved. Therefore, the technical scheme of the application effectively solves the problem that the soft prosthesis in the related technology cannot be perfectly combined with the surrounding cartilage after being implanted, and the use effect of a patient is poor.

In order to reduce the difficulty of adjustment, as shown in fig. 1 to 3 and 6 to 10, in the present embodiment, the adjusting structure 30 includes an adjusting column 31 and a threaded hole 32 engaged with the adjusting column 31, a side surface of the adjusting column 31 is provided with an external thread 311 engaged with the threaded hole 32, the adjusting column 31 is disposed on the cartilage portion 20, and the threaded hole 32 is disposed on the base 10. Be provided with the external screw thread on the side of adjusting the post, external screw thread 311 and screw hole 32 spiro union cooperation, and then make and adjust post 31 and can adjust the height in screw hole 32, and then realize the regulation of the height of cartilage portion 20. The threaded connection has a simple structure and is convenient to arrange. Meanwhile, the structural strength of the adjusting column 31 is good, and the cartilage portion 20 can be effectively supported, so that the overall structural strength of the cartilage prosthesis can be ensured.

As shown in fig. 1, 6 and 7, in the present embodiment, the adjusting column 31 is disposed on the cartilage portion 20, a through hole 312 is disposed inside the adjusting column 31, the cartilage portion 20 includes a cartilage body 21 and a first mounting column 22 protruding downward from the cartilage body 21, and the first mounting column 22 is inserted into the through hole 312. The first mounting post 22 is inserted into the through hole 312 and interference fit. The assembly mode is simple and high in efficiency. When the doctor implants the adjusting structure, the adjusting column 31 is rotated into the threaded hole 32, the supporting height of the adjusting column 31 is adjusted, and when the supporting height is adjusted to a proper height, the cartilage portion 20 is mounted on the adjusting column 31, so that the assembly of the cartilage prosthesis is completed.

In order to make the installation of the cartilage portion easier, the through hole 312 is a tapered hole, the first installation column 22 is tapered, and the through hole 312 is inserted into and matched with the first installation column 22. The tapered hole can play a role in locking, when the first mounting post 22 is inserted into the through hole 312, since the first mounting post 22 and the through hole 312 are both tapered, the first mounting post 22 is tightly connected with the through hole 312, and can be locked with the through hole 312 along with the downward movement of the first mounting post 22, so that the cartilage portion 20 can be prevented from being easily removed.

In consideration of the regularity of the overall structure, as shown in fig. 1 to 3, in the present embodiment, the cartilage body 21 is provided with a mounting groove 211 around the outside of the first mounting post 22, and part of the structure of the adjustment post 31 is located in the mounting groove 211. The arrangement of the mounting groove 211 can enable the adjusting column 31 to be inserted into the mounting groove, so that the adjusting column 31 can be effectively hidden between the base body 10 and the cartilage part 20, and the whole structure can be more regular; meanwhile, the side wall of the mounting groove 211 can limit the adjusting column 31, so as to limit the position of the adjusting column 31, and ensure the stability of the structure of the cartilage prosthesis.

In order to avoid unnecessary rotation of the adjustment post, in the present embodiment, as shown in fig. 8 to 10, a locking member 40 is provided between the base 10 and the adjustment post 31, and the locking member 40 locks the relative position between the adjustment post 31 and the base 10. The locking member 40 is provided to restrict the rotation of the adjustment post 31, thereby fixing the distance between the cartilage portion 20 and the base body 10. The locking member 40 is simple in structure and easy to set. Specifically, the locking member 40 is two, which can improve the locking effect.

As shown in fig. 2, 3, 6 and 10, in the present embodiment, a plurality of through grooves 313 are provided at intervals on the outer side wall of the adjusting column 31, the extending direction of each through groove 313 is parallel to the axis of the adjusting column 31, the upper surface of the base 10 is provided with a mounting portion 11, and the locking members 40 are mounted in the corresponding through grooves 313 and the mounting portions 11. The through groove 313 is simple in structure and convenient to arrange, and the locking member 40 is inserted into the through groove 313 and the mounting portion 11, so that the locking of the adjusting column 31 is realized. Specifically, in the present embodiment, the number of the through grooves 313 is 10, and the 10 through grooves 313 are provided at intervals, so that the locking member 40 can be engaged with one through groove 313 even if the adjustment column 31 is rotated by only a small angle. This ensures the locking effect.

As shown in fig. 8 to 10, in the present embodiment, the locking member 40 includes a first limiting rod 41 and a second limiting rod 42 disposed at an included angle, the mounting portion 11 includes a mounting groove 111, the first limiting rod 41 is mounted in the through groove 313, and the second limiting rod 42 is located in the mounting groove 111. The first limiting rod 41 is arranged in the through groove 313, the second limiting rod 42 is arranged in the mounting groove 111, so that the contact area between the first limiting rod 41 and the through groove 313 is large, the stress area of the first limiting rod 41 is large, and stress concentration on the first limiting rod 41 can be effectively avoided. Similarly, the contact area between the second limiting rod 42 and the mounting groove 111 is large, so that the stress area of the second limiting rod 42 is large, and the stress concentration on the second limiting rod 42 can be avoided. The arrangement mode can effectively protect the first limiting rod 41 and the second limiting rod 42, and the first limiting rod 41 and the second limiting rod 42 are prevented from deforming to influence the locking effect. An included angle is formed between the first limiting rod 41 and the second limiting rod 42, and the arrangement is to enable the second limiting rod 42 to be better limited and avoid the rotation of the adjusting column 31. Specifically, in the present embodiment, the angle between the first stopper rod 41 and the second stopper rod 42 is 90 °. Of course, in the embodiment not shown in the drawings, the included angle may be between 60 ° and 120 °.

As shown in fig. 8 to 10, in the present embodiment, the locking member 40 further includes a second mounting post 43, the first limiting rod 41, the second limiting rod 42 and the second mounting post 43 are sequentially connected, the mounting portion 11 further includes a mounting hole 112, a diameter of the mounting hole 112 is greater than a width of the mounting groove 111, the mounting groove 111 is communicated with the mounting hole 112, and the second mounting post 43 is located in the mounting hole 112. The second mounting post 43 engages the mounting hole 112 to further enhance the locking effect of the locking member 40 and prevent the locking member 40 from rotating.

As shown in fig. 4, 6 and 8, in the present embodiment, the depth of the mounting hole 112 is greater than the depth of the mounting groove 111, and the mounting hole 112 is a tapered hole. The shape of the second mounting post 43 is adapted to the mounting hole 112, i.e. the second mounting post 43 is also tapered. The second mounting post 43 is inserted into the mounting hole 112, and both of them are tapered, so that the second mounting post 43 can be locked, and further the locking member 40 can be locked, and therefore, the second mounting post 43 can perform the positioning and limiting functions on one hand. On the other hand, to lock the locking member 40 itself. The depth of the mounting hole 112 is greater than the depth of the mounting groove 111, which makes the mounting of the second mounting post 43 easier, and further makes the position of the second mounting post 43 more fixed. While the mounting groove 111 can support the second stopper rod 42. This enables the position of the locking member 40 to be fixed.

In order to make the installation of first gag lever post more convenient, can be better spacing to first gag lever post simultaneously, as shown in fig. 4 to 6, in this embodiment, be provided with arc 12 on the base member 10, the extending direction of arc 12 is parallel with the axis of base member 10, arc 12 and mounting groove 111 intercommunication, the opening of arc 12 is towards screw hole 32, leads to the groove depth of groove 313 and is greater than the groove depth of arc 12. The arc-shaped groove 12 is engaged with the through groove 313, so that the first stopper rod 41 can be inserted into the arc-shaped groove 12 and the through groove 313. The arc-shaped groove 12 can limit the first limiting rod 41 on one hand, and can reserve an installation space for the first limiting rod 41 on the other hand. The arc-shaped groove 12 is positioned below the mounting groove 111 and is conducted with the mounting groove 111, so that interference between the arc-shaped groove 12 and the mounting groove 111 can be avoided. The depth of the through groove 313 is greater than that of the arc-shaped groove 12, that is, the through groove 313 is a large semi-arc, and the arc-shaped groove 12 is a small semi-arc. Such an arrangement enables the first stopper rod 41 to be disengaged from the through groove 313. Meanwhile, the arc-shaped groove 12 has a smaller groove depth, so that the structural strength of the substrate 10 can be ensured, and the substrate is prevented from being damaged in the implantation process.

As shown in fig. 1, in this embodiment, the material of the base body 10 is a trabecular bone structure, the base body 10 includes a first section 13 and a second section 14, the first section 13 is in contact with the cartilage portion 20, the second section 14 is far away from the cartilage portion 20, the diameter of the first section 13 is greater than that of the second section 14, a first arc-shaped transition section 15 is arranged between the first section 13 and the second section 14, and a second arc-shaped transition section 16 is arranged at the bottom edge of the second section 14; the outer surface of the cartilage portion 20 is a cartilage surface. The first section 13, the second section 14, the first curved transition section 15 and the second curved transition section 16 are provided to facilitate the implantation of the base body 10. The cartilage surface is made of materials with mechanical properties meeting clinical application, such as medical silica gel, medical glass or polyurethane, and the roughness of the materials needs to meet the requirements of industrial standards. The bone trabecula type porous structure has the porosity of 50-80 percent and the aperture of 800 mu m +/-200 mu m.

The procedure for implanting the cartilage prosthesis of this example is as follows: the matrix 10 is implanted into the articular cartilage replacement area, the angle is adjusted, the matrix is screwed into the adjusting column 31, the outer surface of the adjusting column 31 is of a threaded structure, the adjusting column 31 can move up and down through rotation, the locking piece 40 is assembled after the position is adjusted, the adjusting column 31 is fixed, the adjusting column 31 cannot rotate after the adjusting column 31 is fixed, the height of the adjusting column 31 is constant, and finally, the cartilage portion is inserted into the through hole 312, so that cartilage replacement is realized.

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. A cartilage prosthesis, comprising:

a base (10);

a cartilage portion (20) provided on the base body (10);

an adjustment structure (30), the adjustment structure (30) being arranged between the base body (10) and the cartilage portion (20), the adjustment structure (30) being capable of adjusting the distance between the base body (10) and the cartilage portion (20).

2. Cartilage prosthesis according to claim 1, characterized in that the adjustment structure (30) comprises an adjustment post (31) and a threaded hole (32) cooperating with the adjustment post (31), the side of the adjustment post (31) being provided with an external thread (311) cooperating with the threaded hole (32), one of the adjustment post (31) and the threaded hole (32) being provided on the cartilage portion (20) and the other on the base body (10).

3. The cartilage prosthesis according to claim 2, wherein the adjustment column (31) is provided on the cartilage portion (20), a through hole (312) is provided inside the adjustment column (31), the cartilage portion (20) comprises a cartilage body (21) and a first mounting column (22) protruding downward from the cartilage body (21), and the first mounting column (22) is inserted into the through hole (312).

4. The cartilage prosthesis of claim 3 wherein the through hole (312) is a tapered hole and the first mounting post (22) is tapered, the through hole (312) and the first mounting post (22) being a snap fit.

5. The cartilage prosthesis according to claim 3, wherein the cartilage body (21) is provided with a mounting groove (211) surrounding the outer side of the first mounting column (22), and part of the structure of the adjusting column (31) is located in the mounting groove (211).

6. Cartilage prosthesis according to claim 2, characterized in that a locking element (40) is arranged between the base body (10) and the adjustment column (31), said locking element (40) locking the relative position between the adjustment column (31) and the base body (10).

7. The cartilage prosthesis is characterized in that a plurality of through grooves (313) are formed in the outer side wall of the adjusting column (31) at intervals, the extending direction of each through groove (313) is parallel to the axis of the adjusting column (31), a mounting part (11) is arranged on the upper surface of the base body (10), and the locking pieces (40) are mounted in the corresponding through grooves (313) and the mounting parts (11).

8. The cartilage prosthesis of claim 7, wherein the locking member (40) comprises a first limiting rod (41) and a second limiting rod (42) arranged at an included angle, the mounting portion (11) comprises a mounting groove (111), the first limiting rod (41) is mounted in the through groove (313), and the second limiting rod (42) is located in the mounting groove (111).

9. The cartilage prosthesis of claim 8, wherein the locking member (40) further comprises a second mounting post (43), the first limiting rod (41), the second limiting rod (42) and the second mounting post (43) are sequentially connected, the mounting portion (11) further comprises a mounting hole (112), the diameter of the mounting hole (112) is larger than the groove width of the mounting groove (111), the mounting groove (111) is communicated with the mounting hole (112), and the second mounting post (43) is located in the mounting hole (112).

10. The cartilage prosthesis of claim 9, wherein the depth of the mounting hole (112) is greater than the depth of the mounting groove (111), the mounting hole (112) being a tapered hole.

11. The cartilage prosthesis according to claim 8, characterized in that an arc-shaped groove (12) is arranged on the base body (10), the extension direction of the arc-shaped groove (12) is parallel to the axis of the base body (10), the arc-shaped groove (12) is communicated with the mounting groove (111), the opening of the arc-shaped groove (12) faces the threaded hole (32), and the groove depth of the through groove (313) is larger than that of the arc-shaped groove (12).