CN110538008A - Tibial prosthesis and knee prosthesis having same - Google Patents

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

Tibial prosthesis and knee prosthesis having same

technical field

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

Background technique

Knee joint prosthesis is an effective method to solve knee arthritis. The anti-rotation wings of tibial prosthesis (also known as tibial platform) in knee joint prosthesis are all integrated with the platform and cannot be changed. During joint replacement, different platforms need to be used for knee joints with different degrees of damage. Therefore, the existing tibial prosthesis has low versatility and cannot meet the demand.

Contents of the invention

The present invention provides a tibial prosthesis and a knee joint prosthesis having the same to solve the problem of low versatility of the tibial prosthesis in the prior art.

In order to solve the above problems, according to one aspect of the present invention, the present invention provides a tibial prosthesis, including: a platform, the platform is a plurality of different shapes; The platform is detachably connected, and the anti-rotation wing is located under the platform, and the anti-rotation wing is used for connecting with the tibia; the connection part, the anti-rotation wing is connected with the platform through the connection part.

Further, there are multiple anti-rotation wings with different shapes, and each platform can be selectively connected with any one of the plurality of anti-rotation wings.

Further, the tibial prosthesis also includes: a limiting part, the limiting part is arranged at an interval from the connecting part, and both the platform and the anti-rotation wing cooperate with the limiting part, so as to prevent the platform from rotating relative to the anti-rotating wing through the limiting part.

Further, the limiting part protrudes below the platform, the limiting part has a limiting groove, and the edge of the anti-rotation wing is arranged in the limiting groove.

Further, the anti-rotation wing includes a main body and two side wings arranged on the main body, wherein the main body is connected to the platform, and there are two limiting parts, and the two limiting parts are engaged with the two side wings in one-to-one correspondence.

Further, the platform has a through hole, the anti-rotor wing has a threaded hole, the connecting part has an external thread, the connecting part is passed through the through hole, and the connecting part is mated with the threaded hole.

Further, the tibial prosthesis also includes: an extension rod, which is detachably connected with the anti-rotation wing.

Further, the lower part of the anti-rotation wing is a tapered structure, the upper end of the extension rod has a tapered groove, and the lower part of the anti-rotation wing is passed through the tapered groove of the extension rod.

Further, the platform has a preset central position, and the tibial prosthesis further includes: a transition piece, through which the anti-rotation wing is connected to the extension rod, and the center line of the extension rod is spaced from the preset center position.

According to another aspect of the present invention, a knee joint prosthesis is provided, the knee joint prosthesis includes a tibial prosthesis, and the tibial prosthesis is the tibial prosthesis provided above.

Applying the technical solution of the present invention, a platform, an anti-rotation wing and a connecting part are provided in the tibial prosthesis, wherein there are multiple platforms, and the anti-rotation wing can be selectively detachably connected to any one of the multiple platforms, and the anti-rotation wing is located at Below the platform, the anti-rotation wing is used to connect with the tibia; at the connection part, the anti-rotation wing is connected to the platform through the connection part. Since the anti-rotator and the platform are of a separate structure, it is possible to select a suitable platform according to the knee joint injury of different patients, connect the suitable platform to the anti-rotator, and then implant it into the patient. The technical solution can meet the needs of different patients and has high versatility.

Description of drawings

The accompanying drawings constituting a part of the present application are used to provide a further understanding of the present invention, and the schematic embodiments and descriptions of the present invention are used to explain the present invention, and do not constitute an improper limitation of the present invention. In the attached picture:

FIG. 1 shows a schematic structural view of a tibial prosthesis provided by Embodiment 1 of the present invention;

Figure 2 shows a top view of Figure 1;

Fig. 3 shows a schematic structural view of the anti-rotor wing in Fig. 1;

Fig. 4 shows another schematic structural view of the anti-rotor wing in Fig. 1;

Fig. 5 shows another schematic structural view of the anti-rotor wing in Fig. 1;

Fig. 6 shows a schematic structural view of the extension rod in Fig. 1;

FIG. 7 shows a schematic structural view of the tibial prosthesis provided by Embodiment 2 of the present invention;

FIG. 8 shows a schematic structural diagram of the transition piece in FIG. 7 .

Wherein, the above-mentioned accompanying drawings include the following reference signs:

10. Platform; 20. Anti-rotor wing; 21. Main body; 22. Side wings; 30. Connecting part; 40. Limiting part;

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Apparently, the described embodiments are only some of the embodiments of the present invention, but not all of them. The following description of at least one exemplary embodiment is merely illustrative in nature and in no way taken as limiting the invention, its application or uses. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

As shown in the drawings, the embodiment of the present invention provides a tibial prosthesis, including: platform 10, the platform 10 is a plurality of different shapes; Any one of the platforms 10 is detachably connected, the anti-rotation wing 20 is located below the platform 10 , and the anti-rotation wing 20 is used to connect with the tibia;

Applying the technical solution of the present embodiment, a platform 10, an anti-rotation wing 20 and a connecting portion 30 are arranged in the tibial prosthesis, wherein there are multiple platforms 10, and the anti-rotation wing 20 can be selectively connected with any one of the multiple platforms 10 10 is detachably connected, and the anti-rotation wing 20 is located below the platform 10 , and the anti-rotation wing 20 is used to connect with the tibia; the connection part 30 , the anti-rotation wing 20 is connected with the platform 10 through the connection part 30 . Since the anti-rotation wing 20 and the platform 10 are separate structures, it is possible to select a suitable platform 10 according to the knee joint injury of different patients, connect the suitable platform 10 and the anti-rotation wing 20, and then implant it into the patient's body. The technical solution can meet the needs of different patients and has high versatility.

In this embodiment, there are multiple anti-rotation wings 20 with different shapes, and each platform 10 can be selectively connected with any one anti-rotation wing 20 among the plurality of anti-rotation wings 20 . In this way, the appropriate anti-rotation wing 20 can be replaced as required to meet the actual conditions of different patients. The versatility of the tibial prosthesis can be further improved by the above arrangement.

In this embodiment, the tibial prosthesis further includes: a limiting part 40, the limiting part 40 is spaced from the connecting part 30, and the platform 10 and the anti-rotation wing 20 cooperate with the limiting part 40, so as to stop the platform through the limiting part 40. 10 rotate relative to anti-rotor wing 20. Through the above arrangement, the platform 10 can be prevented from rotating relative to the anti-rotation wing 20, thereby improving the stability of the prosthesis.

Specifically, the limiting portion 40 protrudes below the platform 10 , the limiting portion 40 has a limiting groove, and the edge of the anti-rotation wing 20 is disposed in the limiting groove. In this way, the edge of the anti-rotator wing 20 can be limited by the limit slot of the limit portion 40 , thereby preventing the platform 10 from rotating relative to the anti-rotor wing 20 .

Optionally, the limiting portion 40 is integrated with the platform 10, which can 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 arranged on the main body 21, wherein the main body 21 is connected with the platform 10, and there are two limiting parts 40, and the two limiting parts 40 correspond to each other. The ground is engaged with the two side wings 22 . Specifically, a part of each side wing 22 is snapped into the limiting groove of each limiting portion 40 . The structural strength and stability of the tibial prosthesis can be improved through the above arrangement.

Optionally, the limiting groove is a U-shaped groove, so as to improve connection reliability with the side wings 22 . There is an included angle between the two side wings 22 to improve the structural strength.

In this embodiment, the platform 10 has a through hole, the anti-rotation wing 20 has a threaded hole, and the connecting portion 30 has an external thread, the connecting portion 30 is passed through the through hole and the connecting portion 30 is mated with the threaded hole. In this way, the reliable connection between the platform 10 and the connecting part 30 can be realized through screw connection, and the operation is convenient.

In this embodiment, the tibial prosthesis further includes: an extension rod 50 , and the extension rod 50 is detachably connected with the anti-rotation wing 20 . The extension rod 50 is used to penetrate into the tibia. The reliability of the connection between the tibial prosthesis and the tibia can be further improved by providing the extension rod 50 .

Optionally, the extension rod 50 is provided with a concave anti-rotation groove or a protruding anti-rotation ridge, which can prevent the extension rod 50 from rotating relative to the tibia and improve the reliability of prosthesis implantation.

As shown in Fig. 3 and Fig. 6, in one embodiment, the lower part of the anti-rotor wing 20 is a tapered structure, the upper end of the extension rod 50 has a tapered groove, and the lower part of the anti-rotor wing 20 is passed through the tapered groove of the extension rod 50 middle. This facilitates the mutual positioning and reliable connection of the anti-rotor wing 20 and the extension rod 50 .

As shown in Fig. 7 and Fig. 8, in the second embodiment of the present invention, the platform 10 has a preset central position, and the tibial prosthesis also includes: a transition piece 60, the anti-rotation wing 20 is connected with the extension rod 50 through the transition piece 60, and the lengthening The centerline of the rod 50 is spaced apart from the preset center position. The eccentric setting of the extension rod 50 can be realized through the above setting, so as to match the structure of the tibia and improve the reliability of the connection.

Optionally, the upper end of the transition piece 60 has a tapered groove, the lower part of the transition piece 60 has a tapered structure, the tapered groove of the transition piece 60 is eccentrically arranged with the tapered structure of the transition piece 60, and the lower part of the anti-rotation wing 20 is passed through the In the tapered groove of the transition piece 60 , the lower part of the transition piece 60 passes through the tapered groove of the extension rod 50 . In this way, the reliable connection of the three and the eccentric setting of the extension rod 50 can be realized.

Another unillustrated embodiment of the present invention provides a knee joint prosthesis, the knee joint prosthesis includes a tibial prosthesis, and the tibial prosthesis is the tibial prosthesis provided above. Applying the technical solution of the present embodiment, a platform 10, an anti-rotation wing 20 and a connecting portion 30 are arranged in the tibial prosthesis, wherein there are multiple platforms 10, and the anti-rotation wing 20 can be selectively connected with any one of the multiple platforms 10 10 is detachably connected, and the anti-rotation wing 20 is located below the platform 10 , and the anti-rotation wing 20 is used to connect with the tibia; the connection part 30 , the anti-rotation wing 20 is connected with the platform 10 through the connection part 30 . Since the anti-rotation wing 20 and the platform 10 are separate structures, it is possible to select a suitable platform 10 according to the knee joint injury of different patients, connect the suitable platform 10 and the anti-rotation wing 20, and then implant it into the patient's body. The technical solution can meet the needs of different patients and has high versatility.

In this embodiment, there are multiple anti-rotation wings 20 with different shapes, and each platform 10 can be selectively connected with any one anti-rotation wing 20 among the plurality of anti-rotation wings 20 . In this way, the appropriate anti-rotation wing 20 can be replaced as required to meet the actual conditions of different patients. The versatility of the tibial prosthesis can be further improved by the above arrangement.

The knee prosthesis also includes a femoral component and a tibial spacer, wherein the femoral component is used to connect with the femur, the femoral component cooperates with the tibial spacer, and the tibial spacer cooperates with the platform of the tibial prosthesis. The femoral component can move relative to the tibial spacer, and the tibial spacer can move relative to the platform to meet the human body's knee joint activity requirements.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

It should be noted that the terminology used here is only for describing specific implementations, and is not intended to limit the exemplary implementations according to the present application. As used herein, unless the context clearly dictates otherwise, the singular is intended to include the plural, and it should also be understood that when the terms "comprising" and/or "comprising" are used in this specification, they mean There are features, steps, operations, means, components and/or combinations thereof.

The relative arrangements of components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise. At the same time, it should be understood that, for the convenience of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. Techniques, methods and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, such techniques, methods and devices should be considered part of the Authorized Specification. In all examples shown and discussed herein, any specific values should be construed as exemplary only, and not as limitations. Therefore, other examples of the exemplary embodiment may have different values. It should be noted that like numbers and letters denote similar items in the following figures, therefore, once an item is defined in one figure, it does not require further discussion in subsequent figures.

In the description of the present invention, it should be understood that orientation words such as "front, back, up, down, left, right", "horizontal, vertical, vertical, horizontal" and "top, bottom" etc. indicate the orientation Or positional relationship is generally based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description. In the absence of a contrary description, these orientation words do not indicate or imply the device or element referred to. It must have a specific orientation or be constructed and operated in a specific orientation, so it should not be construed as limiting the protection scope of the present invention; the orientation words "inner and outer" refer to the inner and outer relative to the outline of each component itself.

For the convenience of description, spatially relative terms may be used here, such as "on ...", "over ...", "on the surface of ...", "above", etc., to describe the The spatial positional relationship between one device or feature shown and other devices or features. 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 the device in the figures is turned over, devices described as "above" or "above" other devices or configurations would then be oriented "beneath" or "above" the other devices or configurations. under other devices or configurations”. Thus, the exemplary term "above" can encompass both an orientation of "above" and "beneath". The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptions used herein interpreted accordingly.

In addition, it should be noted that the use of words such as "first" and "second" to define components is only for the convenience of distinguishing corresponding components. To limit the protection scope of the present invention.

Claims (10)

1. A tibial prosthesis, characterized in that it comprises: Platform (10), said platform (10) is a plurality of different shapes; An anti-rotation wing (20), the anti-rotation wing (20) is optionally detachably connected to any one platform (10) in a plurality of said platforms (10), and said anti-rotation wing (20) is located on said platform (10 ), the anti-rotation wing (20) is used to connect with the tibia; A connection part (30), the anti-rotation wing (20) is connected to the platform (10) through the connection part (30). 2. The tibial prosthesis according to claim 1, wherein: The anti-rotation wings (20) are multiple in different shapes, and each of the platforms (10) can be selectively connected with any one of the plurality of anti-rotation wings (20). 3. tibial prosthesis according to claim 1, is characterized in that, described tibial prosthesis also comprises: A limiting part (40), the limiting part (40) is arranged at intervals from the connecting part (30), the platform (10) and the anti-rotation wing (20) are both connected to the limiting part (40) matched to prevent the platform (10) from rotating relative to the anti-rotation wing (20) through the limiting portion (40). 4. The tibial prosthesis according to claim 3, characterized in that, the limiting portion (40) protrudes below the platform (10), and the limiting portion (40) has a limiting groove , the edge of the anti-rotation wing (20) is set in the limiting groove. 5. The tibial prosthesis according to claim 4, wherein the anti-rotation wing (20) comprises a main body (21) and two side wings (22) arranged on the main body (21), wherein the The main body (21) is connected with the platform (10), and there are two limiting parts (40), and the two limiting parts (40) are engaged with the two side wings (22) in one-to-one correspondence. catch. 6. tibial prosthesis according to claim 1, is characterized in that, described platform (10) has through hole, and described anti-rotation wing (20) has threaded hole, and described connecting portion (30) has external thread, so The connection part (30) is passed through the through hole and the connection part (30) is mated and connected with the threaded hole. 7. tibial prosthesis according to claim 1, is characterized in that, described tibial prosthesis also comprises: An extension rod (50), the extension rod (50) is detachably connected with the anti-rotation wing (20). 8. The tibial prosthesis of claim 7, wherein: The lower part of the anti-rotation wing (20) is a tapered structure, the upper end of the extension rod (50) has a tapered groove, and the lower part of the anti-rotation wing (20) is passed through the tapered groove of the extension rod (50). in the slot. 9. The tibial prosthesis according to claim 7, wherein the platform (10) has a preset center position, and the tibial prosthesis further comprises: a transition piece (60), the anti-rotor wing (20) is connected to the extension rod (50) through the transition piece (60), and the center line of the extension rod (50) is spaced apart from the preset central position . 10. A knee joint prosthesis, characterized in that the knee joint prosthesis comprises a tibial prosthesis, and the tibial prosthesis is the tibial prosthesis according to any one of claims 1-9.