Repair prosthesis and femoral structure having the same

Abstract

The present invention provides a repair prosthesis and a femoral structure having the same. The repair prosthesis is used for knee joint surgery and includes: a first patch component and a second patch component, and the first patch component is disposed to be positionally adjustable relative to the second patch component so as to fill an inclusive defect site of the metaphysis of the knee joint by changing the relative positional relationship between the first patch component and the second patch component. The repair prosthesis of the present invention solves the problem that it is difficult to adapt the specifications of the existing filling prosthesis to the femoral defect site.

Description

Technical Field

[0001] The present invention relates to the field of medical technology, and in particular, to a repair prosthesis and a femoral structure having the same. Background Art

[0002] With the increasing amount of total knee arthroplasty, knee revision surgery 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 defect will be brought. Severe bone defect affects the stability after prosthesis installation. Therefore, in clinical practice, it is necessary to fill the bone defect, reconstruct the stability of prosthesis installation, and extend the service life of the prosthesis.

[0003] When there is an inclusive defect in the femoral condyle metaphysis, it is necessary to reconstruct the stability of the femoral condyle through a filling block. At present, most filling block prostheses provide 4 to 5 different specifications of prostheses, and the gap between each specification ranges from 5 mm to 10 mm. In clinical practice, due to the different sizes of bone defects, it is very difficult to achieve a perfect fit with the bone defect surface. If the filling block is small, bone cement needs to be used for filling. If the filling block is large, it is necessary to use tools to resect the already defective bone mass to achieve a fit with the larger specification filling block, but this will cause a larger bone defect. Summary of the Invention

[0004] The main object of the present invention is to provide a repair prosthesis and a femoral structure having the same, so as to solve the problem that the specifications of the existing filling prosthesis are difficult to adapt to the femoral defect site.

[0005] To achieve the above object, according to one aspect of the present invention, there is provided a repair prosthesis for knee surgery, the repair prosthesis comprising: a first filling block assembly and a second filling block assembly, the first filling block assembly being disposed relative to the second filling block assembly in a position-adjustable manner, so as to fill the inclusive defect site of the knee metaphysis by changing the relative position relationship between the first filling block assembly and the second filling block assembly.

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

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

[0008] Further, the first filling block assembly is provided with a first sliding tooth group, and the second filling block assembly is provided with a second sliding tooth group, and the first filling block assembly is cooperatively connected with 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 first filling block assembly and / or the second filling block assembly for connecting to the metaphyseal end of the knee joint.

[0014] Further, a first connecting hole is provided on the first filling block assembly, so that a screw passes through the first connecting hole to fix the first filling block assembly on one side of the inclusive defect site of the metaphyseal end of the knee joint, and a second connecting hole is provided on the second filling block assembly, so that a screw passes through the first connecting hole to fix the second filling block assembly on the other side of the inclusive defect site of the metaphyseal end of the knee joint.

[0015] According to another aspect of the present invention, a femoral structure is provided, including a femoral body and a repair prosthesis, and the repair prosthesis is the above-mentioned repair prosthesis.

[0016] The repair prosthesis applying the technical solution of the present invention is used to fill the defect site of a joint or a bone. The repair prosthesis includes two filling block assemblies, and each filling block assembly may further be provided with a plurality of filling blocks. The plurality of filling blocks form a shape adapted to the defect site. 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 so as to adapt to the size of the defect site, thereby adjusting the shape of the repair prosthesis so that the repair prosthesis exactly fills the defect site, solving the problem that it is difficult to adapt the specifications of the filling prosthesis in the prior art to the tibial defect site. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings forming 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:

[0018] Figure 1 Shows a schematic diagram of the overall structure of an embodiment of the femoral structure according to the present invention;

[0019] Figure 2 Shows a first perspective view of an embodiment of the first filling block assembly of the repair prosthesis of the present invention;

[0020] Figure 3 Shows a second perspective schematic view of the first patch assembly embodiment of the repair prosthesis of the present invention;

[0021] Figure 4 Shows a first perspective schematic view of the second patch assembly embodiment of the repair prosthesis of the present invention;

[0022] Figure 5 Shows a second perspective schematic view of the second patch assembly embodiment of the repair prosthesis of the present invention;

[0023] Figure 6 Shows a first perspective schematic view of the first embodiment of the repair prosthesis of the present invention;

[0024] Figure 7 Shows a second perspective schematic view of the first embodiment of the repair prosthesis of the present invention;

[0025] Figure 8 Shows a first perspective schematic view of the second embodiment of the repair prosthesis of the present invention;

[0026] Figure 9 Shows a second perspective schematic view of the second embodiment of the repair prosthesis of the present invention;

[0027] Figure 10 Shows a schematic view of the femoral body and the defect site of the femoral structure embodiment of the present invention.

[0028] Among them, the above-mentioned drawings include the following reference numerals:

[0029] 10. First patch assembly; 11. First sliding tooth group; 12. First connection hole; 20. Second patch assembly; 21. Second sliding tooth group; 22. Second connection hole; 30. Defect site; 40. Femoral body; 50. Screw. Detailed implementation manners

[0030] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments 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.

[0031] The present invention provides a repair prosthesis for knee joint surgery. Please refer to Figures 1 to 10 , the repair prosthesis includes: a first patch assembly 10 and a second patch assembly 20, and the first patch assembly 10 is arranged relative to the second patch assembly 20 in an adjustable position to fill the inclusive defect site 30 of the knee joint metaphysis by changing the relative position relationship between the first patch assembly 10 and the second patch assembly 20.

[0032] The present invention provides a repair prosthesis for filling a defect site of a joint or bone. The repair prosthesis includes two patch components, and each patch component may further be provided with a plurality of filling blocks. The plurality of filling blocks form a shape adapted to the defect site. 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 so as to adapt to the size of the defect site, thereby adjusting the shape of the repair prosthesis so that the repair prosthesis exactly fills the defect site, solving the problem that it is difficult to adapt the specifications of the existing filling prosthesis to the tibial defect site.

[0033] 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.

[0034] Preferably, the tibial 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.

[0035] 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 connected in cooperation 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 arranged oppositely, and the second rack and the fourth rack are arranged oppositely.

[0036] In this embodiment, the position adjustment relationship between the first patch component 10 and the second patch component 20 is realized through the racks.

[0037] The third rack and the fourth rack are relatively movably arranged to move closer or farther away from each other.

[0038] 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.

[0039] 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.

[0040] The first sliding tooth group 11 and the first complementary block assembly 10 are of an integrally formed structure, and the second sliding tooth group 21 and the second complementary block assembly 20 are of an integrally formed structure.

[0041] The first complementary block assembly 10 and / or the second complementary block assembly 20 are provided with connecting portions for connecting with the metaphyseal end of the knee joint.

[0042] The first complementary block assembly 10 is provided with a first connecting hole 12, so that a screw passes through the first connecting hole 12 to fix the first complementary block assembly 10 on one side of the inclusive defect site 30 of the metaphyseal end of the knee joint. The second complementary block assembly 20 is provided with a second connecting hole 22, so that a screw passes through the first connecting hole 12 to fix the second complementary block assembly 20 on the other side of the inclusive defect site 30 of the metaphyseal end of the knee joint.

[0043] The present invention also provides a femoral structure, including a femoral body 40 and a repair prosthesis, and the repair prosthesis is the above-mentioned repair prosthesis.

[0044] The repair prosthesis in the present invention is used to fill the defect site dropped on the femoral body.

[0045] From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects:

[0046] The present invention relates to a repair prosthesis and a femoral structure. The femoral structure has an adjustable modular tibial bone defect repair prosthesis. This repair prosthesis is composed of a first complementary block assembly 10 and a second complementary block assembly 20. The first complementary block assembly 10 and the second complementary block assembly 20 are assembled and used by meshing with multiple teeth, so as to achieve an adjustment distance with a minimum gradient of 1 mm, minimize the damage to the defective bone mass. After adjusting to the appropriate position, bone grafting screws 50 are respectively used to fix the filling blocks on the femoral condyle through the auxiliary connecting holes of the filling blocks, and finally the femoral condyle prosthesis is implanted.

[0047] Both the first complementary block assembly 10 and the second complementary block assembly 20 are made of biocompatible medical materials, and the surface mostly adopts a porous structure or is surface roughened by a coating technology.

[0048] The above-mentioned repair prosthesis has a height adjustment range between 10 mm and 50 mm.

[0049] It should be noted that the terms used here are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used here, 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.

[0050] Unless otherwise specifically stated, the relative arrangement 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 the sake of convenience 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 authorized specification. In all the examples shown and discussed here, any specific value 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.

[0051] In the description of the present invention, it should be understood that the orientation or positional relationships indicated by orientation words such as "front, rear, upper, lower, left, right", "lateral, vertical, perpendicular, horizontal", and "top, bottom", etc. are usually 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 statements, these orientation words do not indicate and imply that the devices or elements 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 words "inside, outside" refer to the inside and outside relative to the contour of each component itself.

[0052] For the convenience 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 between a device or feature shown in the drawings and other devices or features. It should be understood that the spatial relative terms are intended to include different orientations in use or operation in addition to the orientation described 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 as "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.

[0053] In addition, it should be noted that the use of words such as "first", "second" to limit components is only for the convenience of distinguishing 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.

[0054] 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 repair prosthesis for knee joint surgery, characterized in that, the repair prosthesis comprises: a first patch component (10) and a second patch component (20), the first patch component (10) is arranged to be position - adjustable relative to the second patch component (20), so as to fill the inclusive defect site (30) of the knee joint metaphysis by changing the relative position 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), the second patch component (20) is provided with a second sliding tooth group (21), and the first patch component (10) is cooperatively connected with the second sliding tooth group (21) through the first sliding tooth group (11); the second sliding tooth group (21) is made of an elastic material; the first patch component (10) and / or the second patch component (20) is provided with a connecting part for connecting with the knee joint metaphysis; the first sliding tooth group (11) includes a first rack and a second rack, the second sliding tooth group (21) includes a third rack and a fourth rack, the first rack is arranged opposite to the third rack, and the second rack is arranged opposite to the fourth rack.

2. The repair prosthesis 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 repair prosthesis 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 repair prosthesis according to claim 1, characterized in that, the first patch component (10) is provided with a first connecting hole (12) for a screw to fix the first patch component (10) to one side of the inclusive defect site (30) of the knee joint metaphysis through the first connecting hole (12), and the second patch component (20) is provided with a second connecting hole (22) for a screw to fix the second patch component (20) to the other side of the inclusive defect site (30) of the knee joint metaphysis through the first connecting hole (12).

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