Anti-infection biological knee joint prosthesis
By setting up cross-connected channels and microporous drug storage areas in the knee joint prosthesis, the problem of postoperative infection of biological knee joint prosthesis is solved, the wide distribution and penetration of drugs are achieved, and the anti-infection ability and stability of the prosthesis are improved.
Patent Information
- Application Number
- CN202421987694.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-16
- Publication Date
- 2025-09-23
- Estimated Expiration
- 2034-08-16
AI Technical Summary
Existing biological knee prostheses are prone to surgical failure due to postoperative infection, affecting the long-term stability and success rate of the prosthesis.
An anti-infection biological knee joint prosthesis is designed, which includes a drug storage area set in the femoral prosthesis and the tibial prosthesis. Through the cross-connected first and second channels and micropores, the drug is widely distributed and penetrated to prevent or treat infection.
Through the design of the drug storage area and micropores, the drug solution is widely distributed, effectively preventing or treating postoperative infection of the knee joint prosthesis and improving the prosthesis's anti-infection ability and long-term stability.
Smart Images
Figure CN223365713U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of medical instruments for knee joint surgery, and more specifically to an anti-infection biological knee joint prosthesis. Background Art
[0002] Knee replacement surgery can effectively address knee joint symptoms, alleviate pain, and restore knee function to a certain extent. The knee prosthesis consists of the femoral condyle, tibial plateau, tibial plateau pad, patella, and accessories. With the rapid development of medical device technology and the increasing demand for safe and effective knee prostheses, knee prosthesis technology has become more mature and sophisticated, and a variety of knee prostheses have emerged.
[0003] Currently, knee prostheses can be categorized by fixation method into two main types: cement-fixed and biologic-fixed (non-bone cement). Cement-fixed knee prostheses are considered the most widely used fixation method for total knee arthroplasty. Postoperatively, the cement monomer polymerizes and expands, penetrating the trabeculae, strengthening the cancellous bone and thereby increasing the range of stress transmission, thereby increasing tolerance to surgeon technical deviation and bone quality. However, bone cement is an inert material in the human body and forms only a mechanical bond with bone tissue or the prosthesis, inevitably subject to problems such as aging, fragmentation, and wear particles. Young patients face an increased risk of prosthesis loosening over extended use. Furthermore, the exothermic heat of cement polymerization can damage the surrounding tissue and lead to local postoperative infection, both of which can compromise surgical success and long-term prosthesis stability. Consequently, the use of biologic knee prostheses is increasing, particularly among younger patients. A significant proportion of biologic knee surgery failures are due to postoperative infection.
[0004] Therefore, there is an urgent need for an anti-infection biological knee joint prosthesis to avoid failure of the knee joint prosthesis due to postoperative infection. Utility Model Content
[0005] The utility model provides an infection-resistant biological knee joint prosthesis to solve the problem of operation failure caused by postoperative infection of biological knee joint prostheses in the prior art.
[0006] The purpose of this utility model is achieved through the following technical solutions.
[0007] An anti-infection biological knee joint prosthesis includes a femoral prosthesis and a tibial prosthesis. A drug storage area is provided in the femoral prosthesis and / or the tibial prosthesis. The drug storage area includes a first channel and a second channel. The first channel and the second channel are cross-connected with each other. The side of the femoral prosthesis that is connected to the bone and / or the side of the tibial prosthesis that is connected to the bone are provided with multiple micropores. The multiple micropores are arranged at intervals and are all connected to the drug storage area.
[0008] As a preferred solution of the above-mentioned anti-infection biological knee joint prosthesis, the drug storage area includes a plurality of the first channels and a plurality of the second channels, and the first channels and the second channels are perpendicular to each other.
[0009] As a preferred embodiment of the above-mentioned anti-infection biological knee joint prosthesis, the diameter of the first channel is 0.5 mm-1 mm.
[0010] As a preferred embodiment of the above-mentioned anti-infection biological knee joint prosthesis, the diameter of the second channel is 0.5 mm-1 mm.
[0011] As a preferred solution of the above-mentioned anti-infection biological knee joint prosthesis, a plurality of microholes are provided along the length direction of the first channel and along the length direction of the second channel.
[0012] As a preferred embodiment of the above-mentioned anti-infection biological knee joint prosthesis, the plurality of micropores are evenly distributed on the side where the femoral prosthesis is combined with the bone and / or the side where the tibial prosthesis is combined with the bone.
[0013] As a preferred embodiment of the above-mentioned anti-infection biological knee joint prosthesis, the diameter of the micropores is 0.2 mm-0.5 mm.
[0014] As a preferred embodiment of the above-mentioned anti-infection biological knee joint prosthesis, the femoral prosthesis and / or the tibial prosthesis are manufactured by 3D printing.
[0015] As a preferred embodiment of the above-mentioned anti-infection biological knee joint prosthesis, a biological coating is provided on the side of the femoral prosthesis that is bonded to the bone and / or the side of the tibial prosthesis that is bonded to the bone.
[0016] As a preferred embodiment of the above-mentioned anti-infection biological knee joint prosthesis, at least a portion of the outer surface of the femoral prosthesis and / or at least a portion of the outer surface of the tibial prosthesis is provided with the micropores.
[0017] The beneficial effects of the utility model are:
[0018] The anti-infection biological knee joint prosthesis of the present invention has a drug storage area with a first channel and a second channel that are cross-connected with each other, so that the drug storage area can be distributed over a relatively wide range, and multiple micropores can be selectively set at different positions of the femoral prosthesis and the tibial prosthesis, so that the drug solution can be diffused through the micropores to the position where anti-infection is required, so as to achieve the effect of preventing or treating infection. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 1 is a schematic structural diagram of a femoral prosthesis of the anti-infection biological knee joint prosthesis in this embodiment;
[0020] Figure 2 3. It is a bottom view of the tibial prosthesis of the anti-infection biological knee joint prosthesis in this embodiment;
[0021] Figure 3 Schematic diagram of the structure of the drug storage area of the anti-infection biological knee joint prosthesis in this embodiment.
[0022] In the figure: 1, femoral prosthesis; 2, tibial prosthesis; 3, first channel; 4, second channel; 5, microhole. DETAILED DESCRIPTION
[0023] The technical solution of the present utility model is further described below through specific embodiments.
[0024] like Figure 1-3 As shown, this embodiment provides an anti-infection bio-type knee joint prosthesis, which includes a femoral prosthesis 1 and a tibial prosthesis 2. Depending on the specific situation, a drug storage area can be set in the femoral prosthesis 1 and the tibial prosthesis 2, or only in the femoral prosthesis 1 or only in the tibial prosthesis 2. The drug storage area includes a first channel 3 and a second channel 4. The first channel 3 and the second channel 4 are cross-connected with each other. A plurality of micropores 5 are provided on the side where the femoral prosthesis 1 is combined with the bone and / or the side where the tibial prosthesis 2 is combined with the bone. The plurality of micropores 5 are arranged at intervals and are all connected to the drug storage area.
[0025] In the anti-infection biological knee joint prosthesis in this embodiment, the drug storage area is provided with a first channel 3 and a second channel 4 that cross-connect with each other, so that the drug storage area can be distributed over a relatively wide range, and multiple micropores 5 can be selectively set at different positions of the femoral prosthesis 1 and the tibial prosthesis 2, so that the drug solution can be diffused through the micropores 5 to the position where anti-infection is required, so as to achieve the effect of preventing or treating infection.
[0026] In this embodiment, the drug storage areas are provided on both the femoral prosthesis 1 and the tibial prosthesis 2 as an example for description.
[0027] In this embodiment, micropores 5 are provided on at least a portion of the outer surfaces of the femoral prosthesis 1 and the tibial prosthesis 2 , thereby preventing or treating infection of tissues at corresponding locations.
[0028] In this embodiment, the drug storage area includes multiple first channels 3 and multiple second channels 4. The first channels 3 and the second channels 4 intersect each other vertically, so that the drug storage area forms a grid structure, and the first channels 3 and the second channels 4 can be connected to each other.
[0029] In this embodiment, a plurality of micropores 5 are provided along the length of the first channel 3 and along the length of the second channel 4. Preferably, the micropores 5 are evenly distributed on the side of the femoral prosthesis 1 that interfaces with the bone and the side of the tibial prosthesis 2 that interfaces with the bone, so that the drug solution is more evenly distributed on the bone surface.
[0030] In this embodiment, the diameter of the first channel 3 is 0.5 mm to 1 mm, the diameter of the second channel 4 is 0.5 mm to 1 mm, and the diameter of the micropore 5 is 0.2 mm to 0.5 mm.
[0031] In this embodiment, the femoral prosthesis 1 and the tibial prosthesis 2 are made by 3D printing to ensure the formation of the internal drug storage area and the micropores 5. Depending on the specific situation, other suitable molding processes can be selected to form the corresponding femoral prosthesis 1 and tibial prosthesis 2.
[0032] In this embodiment, both the side of the femoral prosthesis 1 that is integrated with the bone and the side of the tibial prosthesis 2 that is integrated with the bone are provided with a biological coating to promote bone ingrowth.
[0033] The working principle of this embodiment is as follows:
[0034] During use, the femoral prosthesis 1 and tibial prosthesis 2 are immersed in an antibacterial solution, so that the first channel 3 and second channel 4 of the drug storage area are filled with the antibacterial solution. Due to capillary action, the antibacterial solution is absorbed into the micropores 5 and stored in the first channel 3 and second channel 4. During surgery, the femoral prosthesis 1 and tibial prosthesis 2 are installed on the affected bone surface. Under the action of gravity, the antibacterial solution penetrates through the micropores 5 to the area where the femoral prosthesis 1 and tibial prosthesis 2 are connected to the bone. The antibacterial solution can directly act on the bone and surrounding tissues of the joint, preventing or treating infection. The micropores 5 cooperate with the bio-coating provided on the femoral prosthesis 1 and tibial prosthesis 2 to promote bone ingrowth.
[0035] In addition, depending on the specific structure of the knee joint prosthesis replacement, the drug storage area and the micropores 5 and other structures can be provided only on the femoral prosthesis 1 or only on the tibial prosthesis 2.
[0036] The above describes an embodiment of the present invention in detail. However, the above content is only a preferred embodiment of the present invention and should not be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the patent application of the present invention.
Claims
1. Anti-infection biological knee joint prosthesis, characterized by: The invention comprises a femoral prosthesis (1) and a tibial prosthesis (2), wherein a drug storage area is provided in the femoral prosthesis (1) and / or the tibial prosthesis (2), wherein the drug storage area comprises a first hole (3) and a second hole (4), wherein the first hole (3) and the second hole (4) are cross-connected with each other, and a plurality of micropores (5) are provided on one side of the femoral prosthesis (1) that is connected to the bone and / or a plurality of micropores (5) are provided on one side of the tibial prosthesis (2) that is connected to the bone, wherein the plurality of micropores (5) are spaced apart from each other and are all connected with the drug storage area.
2. The anti-infection biological knee joint prosthesis according to claim 1, characterized in that: The drug storage area comprises a plurality of the first channels (3) and a plurality of the second channels (4), and the first channels (3) and the second channels (4) intersect each other perpendicularly.
3. The anti-infection biological knee joint prosthesis according to claim 1, characterized in that: The diameter of the first channel (3) is 0.5 mm-1 mm.
4. The anti-infection biological knee joint prosthesis according to claim 1, characterized in that: The diameter of the second channel (4) is 0.5 mm to 1 mm.
5. The anti-infection biological knee joint prosthesis according to claim 1, characterized in that: A plurality of micropores (5) are provided along the length direction of the first pore (3) and along the length direction of the second pore (4).
6. The anti-infection biological knee joint prosthesis according to claim 1, characterized in that: The plurality of micropores (5) are evenly distributed on the side of the femoral prosthesis (1) that is combined with the bone and / or the side of the tibial prosthesis (2) that is combined with the bone.
7. The anti-infection biological knee joint prosthesis according to claim 1, characterized in that: The diameter of the micropores (5) is 0.2 mm to 0.5 mm.
8. The anti-infection biological knee joint prosthesis according to claim 1, characterized in that: The femoral prosthesis (1) and / or the tibial prosthesis (2) are manufactured by 3D printing.
9. The anti-infection biological knee joint prosthesis according to claim 1, characterized in that: The side of the femoral prosthesis (1) that is combined with the bone and / or the side of the tibial prosthesis (2) that is combined with the bone is provided with a biological coating.
10. The anti-infection biological knee joint prosthesis according to claim 1, characterized in that: At least a portion of the outer surface of the femoral prosthesis (1) and / or at least a portion of the outer surface of the tibial prosthesis (2) is provided with the micropores (5).