Tibial prosthesis structure

Abstract

The present invention provides a tibial prosthesis structure for knee joint surgery. The tibial prosthesis structure includes: a tibial body; a repair prosthesis for filling a defect site at the metaphysis of the tibial body. The repair prosthesis includes a first patch assembly and a second patch assembly, and the first patch assembly is arranged to be position-adjustable relative to the second patch assembly, so as to fill an inclusive defect site at the metaphysis of the knee joint by changing the relative positional relationship between the first patch assembly and the second patch assembly. The tibial prosthesis structure of the present invention solves the problem that it is difficult for the specifications of the existing filling prosthesis to match the tibial defect site.

Description

Technical Field

[0001] The present invention relates to the field of medical prostheses, and more particularly, to a tibial prosthesis structure. Background Art

[0002] With the increase in the number of total knee arthroplasties, the number of knee revision surgeries has also increased year by year. Postoperative infection and prosthesis loosening are the main reasons for knee revision. Whether it is infection or prosthesis loosening, bone defects will be caused. Severe bone defects affect the stability after prosthesis installation. Therefore, in clinical practice, it is necessary to fill the bone defects, reconstruct the stability of prosthesis installation, and extend the service life of the prosthesis.

[0003] When there is an inclusive defect in the proximal tibia, a filling block is needed to reconstruct the stability of the tibial plateau. Currently, most filling block prostheses provide 4 to 5 sizes of prostheses, and the difference between each size ranges from 5 mm to 10 mm. In clinical practice, due to the different sizes of bone defects, a perfect fit with the bone defect surface cannot be achieved, and bone cement is still needed for filling. Otherwise, tools are required to remove the already defective bone mass to achieve a fit with a larger-sized filling block, resulting in a larger bone defect. Summary of the Invention

[0004] The main object of the present invention is to provide a tibial prosthesis structure to solve the problem that the specifications of existing filling prostheses are difficult to adapt to the tibial defect site.

[0005] To achieve the above object, according to one aspect of the present invention, there is provided a tibial prosthesis structure for knee surgery, the tibial prosthesis structure comprising: a tibial body; a repair prosthesis for filling a defect site at the metaphysis of the tibial body, the repair prosthesis including a first patch assembly and a second patch assembly, the first patch assembly being disposed relative to the second patch assembly in an adjustable position to fill an inclusive defect site at the metaphysis of the knee joint by changing the relative positional relationship between the first patch assembly and the second patch assembly.

[0006] Further, the first patch assembly and the second patch assembly are relatively movably disposed to move closer to or away from each other.

[0007] Further, the first patch assembly is provided with a first sliding portion, and the second patch assembly is provided with a second sliding portion, and the first patch assembly moves relative to the second sliding portion through the first sliding portion.

[0008] Further, the first patch assembly is provided with a first sliding tooth group, and the second patch assembly is provided with a second sliding tooth group, and the first patch assembly is cooperatively connected to the second sliding tooth group through the first sliding tooth group.

[0009] Further, the first sliding tooth group includes a first rack and a second rack, the second sliding tooth group includes a third rack and a fourth rack, the first rack is disposed opposite to the third rack, and the second rack is disposed opposite to the fourth rack.

[0010] Further, the third rack and the fourth rack are movably disposed relative to each other to move closer to or away from each other.

[0011] Further, the second sliding tooth group is made of an elastic material.

[0012] Further, the first sliding tooth group and the first filling block assembly are of an integrally formed structure, and the second sliding tooth group and the second filling block assembly are of an integrally formed structure.

[0013] Further, a connecting portion is provided on the repair prosthesis for connecting with the tibial body.

[0014] Further, the connecting portion includes a first card slot and a second card slot. The first card slot is provided on the first filling block assembly to fix the first filling block assembly on the tibial body through the first card slot; the second card slot is provided on the second filling block assembly to fix the second filling block assembly on the tibial body through the second card slot.

[0015] The tibial prosthesis structure applying the technical solution of the present invention is mainly applied in knee joint surgeries to repair the defect site of the metaphysis of the tibial body. The tibial prosthesis structure includes a tibial body and a repair prosthesis part. The repair prosthesis includes a first filling block assembly and a second filling block assembly. The first filling block assembly and the second filling block assembly can move closer to or away from each other to change the shape of the repair prosthesis to adapt to the size of the defect site, so as to just fill the defect site by adjusting the shape of the repair prosthesis, solving the problem that it is difficult to match the specifications of the existing filling prosthesis with the tibial defect site. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings, which form a part of this application, are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation to the present invention. In the drawings:

[0017] Figure 1 shows a schematic diagram of the overall structure of an embodiment of the tibial prosthesis structure according to the present invention;

[0018] Figure 2 shows a first perspective view of an embodiment of the first filling block assembly of the tibial prosthesis structure of the present invention;

[0019] Figure 3Shows a second perspective schematic view of the first patch component embodiment of the tibial prosthesis structure of the present invention;

[0020] Figure 4 Shows a first perspective schematic view of the second patch component embodiment of the tibial prosthesis structure of the present invention;

[0021] Figure 5 Shows a second perspective schematic view of the second patch component embodiment of the tibial prosthesis structure of the present invention;

[0022] Figure 6 Shows a schematic view of the first embodiment of the repair prosthesis of the tibial prosthesis structure of the present invention;

[0023] Figure 7 Shows a schematic view of the second embodiment of the repair prosthesis of the tibial prosthesis structure of the present invention;

[0024] Figure 8 Shows a schematic view of the tibial body and the defect site of the tibial prosthesis structure embodiment of the present invention.

[0025] Among them, the above-mentioned drawings include the following reference numerals:

[0026] 10. First patch component; 11. First sliding tooth group; 12. First card slot; 20. Second patch component; 21. Second sliding tooth group; 22. Second card slot; 30. Defect site; 40. Tibial body. Detailed implementation manners

[0027] It should be noted that, without conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present invention will be described in detail below with reference to the drawings and in combination with the embodiments.

[0028] The present invention provides a tibial prosthesis structure for knee joint surgery. Please refer to Figures 1 to 8 , the tibial prosthesis structure includes: a tibial body 40; a repair prosthesis for filling the defect site 30 at the metaphysis of the tibial body 40. The repair prosthesis includes a first patch component 10 and a second patch component 20. The first patch component 10 is disposed such that its position is adjustable relative to the second patch component 20, so as to fill the inclusive defect site 30 at the metaphysis of the knee joint by changing the relative positional relationship between the first patch component 10 and the second patch component 20.

[0029] The tibial prosthesis structure in the present invention is mainly applied in knee joint surgeries to repair the defect site 30 at the metaphysis of the tibial body 40. The tibial prosthesis structure includes the tibial body 40 and a repair prosthesis part. The repair prosthesis includes a first patch component 10 and a second patch component 20. The first patch component 10 and the second patch component 20 can move relatively closer or farther away to change the shape of the repair prosthesis to adapt to the size of the defect site, so as to exactly fill the defect site by adjusting the shape of the repair prosthesis, solving the problem that it is difficult to match the specifications of the filling prosthesis in the prior art with the tibial defect site.

[0030] The first patch component 10 and the second patch component 20 are relatively movably arranged to move closer or farther away from each other. The first patch component 10 is provided with a first sliding part, and the second patch component 20 is provided with a second sliding part. The first patch component 10 moves relative to the second sliding part through the first sliding part.

[0031] In this embodiment, the first patch component 10 and the second patch component 20 are relatively slidably arranged.

[0032] Preferably, the tibial prosthesis structure further includes a locking component for locking the first patch component 10 and the second patch component 20 together. During use, first move the relative positions of the first patch component 10 and the second patch component 20. After moving to the proper positions, the locking component fixes the first patch component 10 and the second patch component 20 together and fills them into the defect site.

[0033] The first patch component 10 is provided with a first sliding tooth group 11, and the second patch component 20 is provided with a second sliding tooth group 21. The first patch component 10 is cooperatively connected with the second sliding tooth group 21 through the first sliding tooth group 11. The first sliding tooth group 11 includes a first rack and a second rack, and the second sliding tooth group 21 includes a third rack and a fourth rack. The first rack and the third rack are oppositely arranged, and the second rack and the fourth rack are oppositely arranged.

[0034] In this embodiment, the position adjustment relationship between the first patch component 10 and the second patch component 20 is realized through the racks.

[0035] The third rack and the fourth rack are relatively movably arranged to move closer or farther away from each other.

[0036] In this embodiment, when inserting the second patch component into the first patch component, first move the third rack and the fourth rack closer, then place them between the first rack and the second rack, and then move the third rack and the fourth rack apart so that the third rack cooperates with the first rack and the second rack and the fourth rack cooperate, thereby positioning the position relationship between the first patch component 10 and the second patch component 20.

[0037] Preferably, the second sliding tooth group 21 is made of an elastic material. In this way, during use, the third rack and the fourth rack can be pressed first, and then placed between the first rack and the second rack.

[0038] The first sliding tooth group 11 and the first supplementary block assembly 10 are of an integrally formed structure, and the second sliding tooth group 21 and the second supplementary block assembly 20 are of an integrally formed structure.

[0039] The repair prosthesis is provided with a connecting portion for connecting with the tibial body 40. The connecting portion includes a first card slot 12 and a second card slot 22. The first card slot 12 is arranged on the first supplementary block assembly 10 so that the first supplementary block assembly 10 is fixed on the tibial body 40 through the first card slot 12; the second card slot 22 is arranged on the second supplementary block assembly 20 so that the second supplementary block assembly 20 is fixed on the tibial body 40 through the second card slot 22.

[0040] From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects:

[0041] The present invention relates to a tibial prosthesis structure, which has an adjustable modular tibial bone defect repair prosthesis. This repair prosthesis is composed of a first supplementary block assembly 10 and a second supplementary block assembly 20. The first supplementary block assembly 10 and the second supplementary block assembly 20 are engaged and assembled through a plurality of teeth for use, so as to achieve an adjustment distance with a minimum gradient of 1 mm, minimize the damage to the defective bone mass, and implant the tibial plateau prosthesis assembly after adjusting to a suitable position.

[0042] Both the first supplementary block assembly 10 and the second supplementary block assembly 20 are made of biocompatible medical materials, and the surface mostly adopts a porous structure or is surface roughened through a coating technology.

[0043] The above repair prosthesis has a height adjustment range between 10 mm and 50 mm.

[0044] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0045] Unless otherwise specifically stated, 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. At the same time, it should be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn in actual proportional relationships. Technologies, methods, and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the said technologies, methods, and devices should be regarded as part of the authorization specification. In all the examples shown and discussed here, any specific values should be construed as merely exemplary and not as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numerals and letters denote like items in the following drawings, and thus, once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0046] In the description of the present invention, it should be understood that the orientation or positional relationships indicated by orientation terms such as "front, rear, upper, lower, left, right", "lateral, vertical, perpendicular, horizontal", and "top, bottom" are generally based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description. Without contrary description, these orientation terms do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and thus should not be construed as limiting the protection scope of the present invention; the orientation terms "inside, outside" refer to the inside and outside relative to the contour of each component itself.

[0047] For ease of description, spatial relative terms such as "above...", "over...", "on the upper surface of...", "above" can be used here to describe the spatial positional relationships of one device or feature with other devices or features as shown in the drawings. It should be understood that the spatial relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the drawings for the device. For example, if the device in the drawing is inverted, the device described as "above other devices or structures" or "over other devices or structures" will then be positioned "below other devices or structures" or "under other devices or structures". Thus, the exemplary term "above" can include both the orientations of "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and corresponding interpretations should be made for the spatial relative descriptions used here.

[0048] In addition, it should be noted that the use of words such as "first", "second" to limit components is only for the convenience of differentiating the corresponding components. Without additional statements, the above words have no special meanings, and thus should not be construed as limiting the protection scope of the present invention.

[0049] The above are only the 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 variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A tibial prosthesis structure for knee joint surgery, characterized in that, the tibial prosthesis structure includes: a repair prosthesis for filling a defect site (30) in the metaphysis of the tibial body (40). The repair prosthesis includes a first patch component (10) and a second patch component (20). The first patch component (10) is arranged in a position-adjustable manner relative to the second patch component (20) to fill an inclusive defect site (30) in the metaphysis of the knee joint by changing the relative positional relationship between the first patch component (10) and the second patch component (20); the first patch component (10) and the second patch component (20) are arranged to be relatively movable so as to move closer to or away from each other; the first patch component (10) is provided with a first sliding tooth group (11), and the second patch component (20) is provided with a second sliding tooth group (21). The first patch component (10) is cooperatively connected to the second patch component (20) through the first sliding tooth group (11); the second sliding tooth group (21) is made of an elastic material; the first sliding tooth group (11) includes a first rack and a second rack, and the second sliding tooth group (21) includes a third rack and a fourth rack. The first rack and the third rack are arranged opposite to each other, and the second rack and the fourth rack are arranged opposite to each other.

2. The tibial prosthesis structure according to claim 1, characterized in that, the third rack and the fourth rack are arranged to be relatively movable so as to move closer to or away from each other.

3. The tibial prosthesis structure according to claim 1, characterized in that, the first sliding tooth group (11) and the first patch component (10) are of an integrally formed structure, and the second sliding tooth group (21) and the second patch component (20) are of an integrally formed structure.

4. The tibial prosthesis structure according to claim 1, characterized in that, the repair prosthesis is provided with a connecting portion for connecting to the tibial body (40).

5. The tibial prosthesis structure according to claim 4, characterized in that, the connecting portion includes a first card slot (12) and a second card slot (22). The first card slot (12) is arranged on the first patch component (10) so that the first patch component (10) is fixed to the tibial body (40) through the first card slot (12); the second card slot (22) is arranged on the second patch component (20) so that the second patch component (20) is fixed to the tibial body (40) through the second card slot (22).

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