CN110538008A

CN110538008A - Tibia prosthesis and knee joint prosthesis with same

Info

Publication number: CN110538008A
Application number: CN201910877583.9A
Authority: CN
Inventors: 王安虎
Original assignee: BEIJING AIKANG YICHENG MEDICAL EQUIPMENT Co Ltd
Current assignee: BEIJING AIKANG YICHENG MEDICAL EQUIPMENT Co Ltd; Beijing AK Medical Co Ltd
Priority date: 2019-09-17
Filing date: 2019-09-17
Publication date: 2019-12-06

Abstract

the invention provides a tibial prosthesis and a knee joint prosthesis with the same, wherein a plurality of platforms, anti-rotation wings and connecting parts are arranged in the tibial prosthesis, the anti-rotation wings can be selectively detachably connected with any one of the platforms, the anti-rotation wings are positioned below the platforms, and the anti-rotation wings are used for being connected with a tibia; the connecting part is connected with the anti-rotation wing through the connecting part. Because prevent rotor and platform for the components of a whole that can function independently structure, can select suitable platform like this according to different patients' knee joint injury condition, be connected suitable platform and prevent the rotor, then implant in the patient. The technical scheme can meet the requirements of different patients and has high universality.

Description

Tibia prosthesis and knee joint prosthesis with same

Technical Field

The invention relates to the technical field of medical instruments, in particular to a tibial prosthesis and a knee joint prosthesis with the same.

Background

The knee joint prosthesis is an effective method for solving the gonarthritis, and anti-rotation wings of a tibial prosthesis (also called a tibial plateau) in the knee joint prosthesis are all integrated with the plateau and cannot be changed. In joint replacement, different platforms need to be used for knee joints with different degrees of trauma. Therefore, the existing tibial prosthesis has low universality and can not meet the requirements.

Disclosure of Invention

The invention provides a tibial prosthesis and a knee joint prosthesis with the same, and aims to solve the problem that the tibial prosthesis in the prior art is low in universality.

in order to solve the above-mentioned problems, according to one aspect of the present invention, there is provided a tibial prosthesis comprising: a plurality of platforms having different shapes; the anti-rotation wing is selectively detachably connected with any one of the platforms, is positioned below the platform and is used for being connected with the tibia; the connecting part is connected with the anti-rotation wing through the connecting part.

further, the anti-rotor wing is a plurality of anti-rotor wings with different shapes, and each platform is selectively connected with any one anti-rotor wing in the plurality of anti-rotor wings.

Further, the tibial prosthesis further comprises: spacing portion, spacing portion and connecting portion interval set up, the platform with prevent that the rotor all cooperates with spacing portion to prevent the rotor rotation relatively through spacing portion prevention platform.

further, spacing portion protrusion sets up in the below of platform, and spacing portion has the spacing groove, prevents that the limit portion of rotor sets up at the spacing inslot.

Further, prevent rotor wing includes the main part and sets up two flanks in the main part, wherein, the main part is connected with the platform, and spacing portion is two, two spacing portions one-to-one ground and two flank joint.

Further, the platform has the through-hole, and the anti-rotor has the screw hole, and connecting portion have the external screw thread, and connecting portion wear to establish in the through-hole and connecting portion and screw hole cooperation are connected.

Further, the tibial prosthesis further comprises: the extension bar is detachably connected with the anti-rotation wings.

Furthermore, the lower part of the anti-rotation wing is of a conical structure, the upper end of the extension bar is provided with a conical groove, and the lower part of the anti-rotation wing is arranged in the conical groove of the extension bar in a penetrating mode.

further, the platform has a pre-set central position, and the tibial prosthesis further comprises: the transition piece is connected with the extension bar through the transition piece, and the center line of the extension bar is arranged at an interval with the preset center position.

According to another aspect of the present invention, there is provided a knee joint prosthesis comprising a tibial prosthesis, the tibial prosthesis being as provided above.

By applying the technical scheme of the invention, a plurality of platforms, anti-rotation wings and connecting parts are arranged in the tibial prosthesis, wherein the anti-rotation wings can be selectively detachably connected with any one of the platforms, are positioned below the platforms and are used for being connected with the tibia; the connecting part is connected with the anti-rotation wing through the connecting part. Because prevent rotor and platform for the components of a whole that can function independently structure, can select suitable platform like this according to different patients' knee joint injury condition, be connected suitable platform and prevent the rotor, then implant in the patient. The technical scheme can meet the requirements of different patients and has high universality.

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 is a schematic structural view of a tibial prosthesis according to a first embodiment of the present invention;

FIG. 2 shows a top view of FIG. 1;

FIG. 3 shows a schematic view of the anti-rotor of FIG. 1;

FIG. 4 shows another schematic view of the anti-rotor of FIG. 1;

FIG. 5 shows another schematic view of the anti-rotor of FIG. 1;

FIG. 6 is a schematic view showing the construction of the extension bar of FIG. 1;

Fig. 7 is a schematic structural view of a tibial prosthesis provided in accordance with a second embodiment of the present invention;

FIG. 8 illustrates a schematic structural view of the transition piece of FIG. 7.

Wherein the figures include the following reference numerals:

10. a platform; 20. a rotor wing is prevented; 21. a main body; 22. a side wing; 30. a connecting portion; 40. a limiting part; 50. lengthening a rod; 60. a transition piece.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. 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.

As shown in the drawings, embodiments of the present invention provide a tibial prosthesis comprising: a plurality of stages 10, the stages 10 having different shapes; the anti-rotation wing 20, the anti-rotation wing 20 can be selectively and detachably connected with any one platform 10 in the plurality of platforms 10, the anti-rotation wing 20 is positioned below the platform 10, and the anti-rotation wing 20 is used for being connected with the tibia; the connection part 30, the anti-rotation wing 20 is connected with the platform 10 through the connection part 30.

By applying the technical scheme of the embodiment, the tibial prosthesis is provided with a plurality of platforms 10, anti-rotation wings 20 and a connecting part 30, wherein the number of the platforms 10 is multiple, the anti-rotation wings 20 can be selectively detachably connected with any one platform 10 of the plurality of platforms 10, the anti-rotation wings 20 are positioned below the platforms 10, and the anti-rotation wings 20 are used for being connected with the tibia; the connection part 30, the anti-rotation wing 20 is connected with the platform 10 through the connection part 30. Because the anti-rotor wing 20 and the platform 10 are of split structures, the appropriate platform 10 can be selected according to the knee joint injury conditions of different patients, the appropriate platform 10 is connected with the anti-rotor wing 20, and then the platform is implanted into the body of the patient. The technical scheme can meet the requirements of different patients and has high universality.

In the present embodiment, the anti-rotor wings 20 are a plurality of different shapes, and each platform 10 is selectively coupled to any one of the anti-rotor wings 20 of the plurality of anti-rotor wings 20. This allows the appropriate anti-rotation wings 20 to be changed as needed to meet the needs of different patients. The universality of the tibial prosthesis can be further improved by the arrangement.

In this embodiment, the tibial prosthesis further comprises: spacing portion 40, spacing portion 40 and the setting of connecting portion 30 interval, platform 10 with prevent that rotor 20 all cooperates with spacing portion 40 to prevent rotor 20 from rotating relatively by platform 10 through spacing portion 40. By this arrangement, rotation of the platform 10 relative to the anti-rotation wings 20 is avoided, thereby improving the stability of the prosthesis.

specifically, the limiting portion 40 is disposed under the platform 10 in a protruding manner, the limiting portion 40 has a limiting groove, and the edge of the anti-rotation wing 20 is disposed in the limiting groove. Thus, the edge of the anti-rotation wing 20 can be limited by the limiting groove of the limiting part 40, so that the platform 10 is prevented from rotating relative to the anti-rotation wing 20.

Optionally, the position-limiting portion 40 is integrated with the platform 10, so as to improve the overall structural strength. The limiting part 40 and the platform 10 can be formed by 3D printing or casting.

In this embodiment, the anti-rotation wing 20 includes a main body 21 and two side wings 22 disposed on the main body 21, wherein the main body 21 is connected to the platform 10, two limiting portions 40 are provided, and the two limiting portions 40 are in one-to-one corresponding to the two side wings 22. Specifically, a portion of each side wing 22 snaps into a retaining groove of each retaining portion 40. Through the arrangement, the structural strength and the stability of the tibial prosthesis can be improved.

Optionally, the retaining groove is a U-shaped groove to improve the reliability of the connection with the side wings 22. The two side wings 22 are angled to improve structural strength.

In the present embodiment, the platform 10 has a through hole, the anti-rotation wing 20 has a threaded hole, the connection portion 30 has an external thread, the connection portion 30 is inserted into the through hole, and the connection portion 30 is connected with the threaded hole. This provides a secure connection of the platform 10 to the connection portion 30 by means of a threaded connection and is easy to handle.

In this embodiment, the tibial prosthesis further comprises: the extension bar 50, the extension bar 50 and the anti-rotation wing 20 are detachably connected. The extension bar 50 is intended to penetrate into the tibia. The reliability of the connection of the tibial prosthesis to the tibia can be further improved by providing the extension bar 50.

Optionally, the extension bar 50 is provided with a concave anti-rotation groove or a convex anti-rotation ridge, so that the extension bar 50 can be prevented from rotating relative to the tibia, and the reliability of prosthesis implantation can be improved.

As shown in fig. 3 and 6, in one embodiment, the lower portion of the anti-rotation wing 20 has a tapered structure, the upper end of the extension bar 50 has a tapered groove, and the lower portion of the anti-rotation wing 20 is inserted into the tapered groove of the extension bar 50. This facilitates the mutual positioning and secure attachment of the anti-rotor 20 and the extension bar 50.

As shown in fig. 7 and 8, in the second embodiment of the present invention, the platform 10 has a predetermined central position, and the tibial prosthesis further includes: the transition piece 60, the anti-rotor wing 20 is connected with the extension bar 50 through the transition piece 60, and the center line of the extension bar 50 is arranged at intervals with the preset center position. Through the arrangement, the eccentric arrangement of the extension bar 50 can be realized, so that the extension bar is matched with the structure of the tibia, and the connection reliability is improved.

Optionally, the upper end of the transition piece 60 has a tapered groove, the lower portion of the transition piece 60 has a tapered structure, the tapered groove of the transition piece 60 and the tapered structure of the transition piece 60 are eccentrically arranged, the lower portion of the anti-rotation wing 20 is inserted into the tapered groove of the transition piece 60, and the lower portion of the transition piece 60 is inserted into the tapered groove of the extension bar 50. This allows for a secure connection of the three and an eccentric arrangement of the extension bar 50.

Another embodiment of the invention, not shown, provides a knee joint prosthesis comprising a tibial prosthesis, the tibial prosthesis being provided as described above. By applying the technical scheme of the embodiment, the tibial prosthesis is provided with a plurality of platforms 10, anti-rotation wings 20 and a connecting part 30, wherein the number of the platforms 10 is multiple, the anti-rotation wings 20 can be selectively detachably connected with any one platform 10 of the plurality of platforms 10, the anti-rotation wings 20 are positioned below the platforms 10, and the anti-rotation wings 20 are used for being connected with the tibia; the connection part 30, the anti-rotation wing 20 is connected with the platform 10 through the connection part 30. Because the anti-rotor wing 20 and the platform 10 are of split structures, the appropriate platform 10 can be selected according to the knee joint injury conditions of different patients, the appropriate platform 10 is connected with the anti-rotor wing 20, and then the platform is implanted into the body of the patient. The technical scheme can meet the requirements of different patients and has high universality.

The knee joint prosthesis further comprises a femoral component and a tibial gasket, wherein the femoral component is used for being connected with a femur, the femoral component is matched with the tibial gasket, and the tibial gasket is matched with a platform of the tibial prosthesis. The femur component can move relative to the tibia gasket, and the tibia gasket can move relative to the platform, so that the requirement of the knee joint of the human body on movement can be met.

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.

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 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.

Claims

1. A tibial prosthesis, comprising:

A plurality of stages (10), the stages (10) having different shapes;

An anti-rotation wing (20), the anti-rotation wing (20) being selectively detachably connected with any one platform (10) of the plurality of platforms (10), the anti-rotation wing (20) being located below the platform (10), the anti-rotation wing (20) being used for being connected with a tibia;

a connection portion (30), the anti-rotation wing (20) is connected with the platform (10) through the connection portion (30).

2. the tibial prosthesis of claim 1,

the anti-rotation wings (20) are in a plurality of different shapes, and each platform (10) is selectively connected with any one anti-rotation wing (20) in the plurality of anti-rotation wings (20).

3. The tibial prosthesis of claim 1, further comprising:

Spacing portion (40), spacing portion (40) with connecting portion (30) interval sets up, platform (10) with prevent rotor (20) all with spacing portion (40) cooperation, with pass through spacing portion (40) stop platform (10) is relative prevent rotor (20) and rotate.

4. tibial prosthesis according to claim 3, characterized in that said stop (40) is provided projecting below said platform (10), said stop (40) having a stop groove in which a side of said anti-rotation wing (20) is provided.

5. the tibial prosthesis according to claim 4, wherein said anti-rotation wing (20) comprises a main body (21) and two lateral wings (22) arranged on said main body (21), wherein said main body (21) is connected to said platform (10), said two limiting portions (40) are provided, and said two limiting portions (40) are engaged with said two lateral wings (22) in a one-to-one correspondence.

6. Tibial prosthesis according to claim 1, characterized in that said platform (10) has a through hole, said anti-rotor (20) has a threaded hole, said connection portion (30) has an external thread, said connection portion (30) is inserted in said through hole and said connection portion (30) is coupled with said threaded hole.

7. the tibial prosthesis of claim 1, further comprising:

An extension bar (50), the extension bar (50) with prevent rotor (20) detachable connection.

8. the tibial prosthesis of claim 7,

Prevent the lower part of rotor (20) and be the toper structure, the upper end of extension bar (50) has the bell jar, prevent that the lower part of rotor (20) is worn to establish in the bell jar of extension bar (50).

9. The tibial prosthesis according to claim 7, wherein said platform (10) has a preset central position, said tibial prosthesis further comprising:

Transition piece (60), prevent rotor (20) and pass through transition piece (60) with extension bar (50) are connected, the central line of extension bar (50) with predetermine central point and put the interval setting.

10. A knee prosthesis comprising a tibial prosthesis, the tibial prosthesis being as claimed in any of claims 1 to 9.