Knee joint prosthesis with reinforcing structure

Abstract

The utility model relates to the field of knee joint prostheses, in particular to a knee joint prosthesis with a reinforcing structure, which comprises a tibia support, a prosthesis body and a first fixing rod, a second fixing rod is arranged at the bottom of the tibia support, a mounting seat is embedded in the middle of the prosthesis body, and the bottom of the first fixing rod is fixedly connected with the top of the mounting seat. The tibia support and the prosthesis body are in implantation connection with knee joint bones of a patient through a second fixing rod and a first fixing rod respectively, the tibia support and the prosthesis body are rotationally connected through a first connecting piece and a second connecting piece, and a rubber column is fixedly installed at the bottom of the cylinder, installed in the sleeve in a clamped mode and capable of moving up and down in the sleeve. The knee joint of a patient can be bent conveniently, flexibility is higher, the tibia support and the prosthesis body are tightly connected and attached to each other through the first connecting piece and the second connecting piece, and loosening and falling are prevented.

Description

Technical Field

[0001] This utility model relates to the field of knee joint prostheses, specifically a knee joint prosthesis with a reinforcement structure. Background Technology

[0002] Knee replacement surgery can effectively resolve knee joint problems, alleviate patient pain, and restore knee joint function to a certain extent. The prosthetic structure of a knee joint includes: the femoral condyle, tibial plateau, tibial plateau pad, patella, and related appendages.

[0003] However, the existing technology has the following drawbacks:

[0004] Most existing hinged knee prostheses rely on hinge bearings for support between the upper and lower hinge structures. Furthermore, the connection between the knee prosthesis mounting structure and the rotating connection structure is not tight, which can easily lead to loosening, misalignment, or excessive wear of the pads, thereby affecting the normal use of the knee prosthesis. Utility Model Content

[0005] The purpose of this invention is to provide a knee joint prosthesis with a reinforced structure to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a knee joint prosthesis with a reinforced structure, comprising a tibial support, a prosthesis body, and a first fixing rod. The tibial support includes a support plate and a top plate. The bottom of the top plate is snapped onto the top of the support plate. Grooves are provided on both sides of the top of the top plate. Gaskets are adhered inside the grooves. A mounting seat is embedded in the middle of the bottom of the prosthesis body. The bottom of the mounting seat is rotatably connected to the middle of the top of the tibial support through a first connector and a second connector. The two sides of the bottom of the prosthesis body are snapped onto the grooves. The middle of the bottom of the tibial support is fixedly connected to the tibia through a second fixing rod. The middle of the top of the mounting seat is provided with a first fixing rod and is fixedly connected to the patella through the first fixing rod.

[0007] Using the above technical solution, the two sides of the bottom of the prosthesis can rotate back and forth inside the groove, which facilitates knee flexion.

[0008] The top of the tray has a second slot in the middle. The second connector includes a second block and a sleeve. The bottom of the sleeve is fixedly connected to the middle of the top of the second block. The second block is engaged and installed inside the second slot and the two are connected by screw threads. The top plate has a second through hole in the middle and the sleeve is inserted and installed inside the second through hole.

[0009] In the above technical solution, the size of the second through hole is smaller than the size of the second slot, which acts as a block for the second connector. The cross-sectional shape of the second slot and the cross-sectional shape of the second block are both circular.

[0010] The first connector includes a first locking block and a cylinder. The top of the cylinder is fixedly connected to the middle of the bottom of the first locking block. A rubber column is fixedly installed at the bottom of the cylinder. An annular baffle is fixedly installed at the top of the sleeve, and an annular plate is fixedly installed on the outer side of the bottom of the cylinder.

[0011] Using the above technical solution, the rubber column is elastic, and the cylinder can move up and down inside the sleeve as the knee joint bends and squeezes the rubber column.

[0012] The mounting base has a first slot and a third slot in the middle from the inside to the outside. The first slot is engaged and installed inside the first slot and the two are connected by screw threads. The base plate is engaged and installed inside the third slot and the two are connected by screw threads.

[0013] With the above technical solution, the base plate is placed at the bottom of the first slot, which acts as a block to prevent the first card block from being firmly installed on the mounting base.

[0014] The base plate has a first through hole in the middle, and the cylinder is inserted into the first through hole.

[0015] Using the above technical solution, the cylinder passes through the first through hole, which facilitates connection with the sleeve.

[0016] The mounting base has a fourth slot in the middle of the top, and a first connecting block is fixedly installed in the middle of the bottom inner wall of the fourth slot. The first fixing rod has a first flange on the outer side of its wider end, and a first mounting groove is opened in the middle of its wider end. The first flange is engaged and installed inside the fourth slot, and the two are connected by screw threads. The first connecting block is threaded inside the first mounting groove.

[0017] In the above technical solution, the shape of the first connecting block is the same as the shape of the wider end of the first fixing rod, and the area around the overlapping connection is reinforced by inclined screw thread connection.

[0018] A second connecting block is fixedly installed in the middle of the bottom of the pallet, and the outer side of the bottom of the second connecting block is provided with external threads. A second mounting groove is provided in the middle of the top of the second fixing rod, and the inner wall of the bottom of the second mounting groove is provided with internal threads. The second connecting block is threadedly installed inside the second mounting groove. The top of the second fixing rod is threadedly connected to the bottom of the pallet through a second flange.

[0019] Using the above technical solution, the top of the second flange is tightly fitted to the middle of the bottom of the pallet and fixed by a screw thread connection.

[0020] Compared with the prior art, the beneficial effects of this utility model are:

[0021] The tibial support and the prosthesis body of this utility model are rotatably connected by a first connector and a second connector. The first connector and the second connector are respectively engaged with the tibial support and the prosthesis body by a first locking block and a second locking block, and then fixed with screws to reinforce them and make the connection between the two tight and prevent loosening. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0023] Figure 2 This is a front structural diagram of the present invention;

[0024] Figure 3 This is a schematic diagram of the connection structure between the tibial support and the second fixing rod of this utility model;

[0025] Figure 4 This is a schematic diagram of the prosthesis body structure of this utility model;

[0026] Figure 5 This is a schematic diagram of the connection structure between the mounting base and the first fixing rod of this utility model.

[0027] In the diagram: 1. Tibial support; 2. Prosthesis body; 3. Mounting base; 4. First fixing rod; 5. Second fixing rod; 6. Top plate; 7. Groove; 8. First mounting groove; 9. First through hole; 10. First flange; 11. First connecting block; 12. First slot; 13. Base plate; 14. First connector; 15. Second connector; 16. Support plate; 17. Second slot; 18. Second connecting block; 19. Second mounting groove; 20. Second flange; 21. Second through hole; 22. Third slot; 23. First locking block; 24. Cylinder; 25. Rubber column; 26. Sleeve; 27. Second locking block; 28. Fourth slot. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0029] Please see Figure 1-5This utility model provides a knee joint prosthesis with a reinforced structure, including a tibial support 1, a prosthesis body 2, and a first fixing rod 4. The tibial support 1 includes a support plate 16 and a top plate 6. The bottom of the top plate 6 is snapped onto the top of the support plate 16. Grooves 7 are formed on both sides of the top of the top plate 6, and gaskets are adhered inside the grooves 7. A mounting seat 3 is embedded in the middle of the bottom of the prosthesis body 2. The bottom of the mounting seat 3 is rotatably connected to the middle of the top of the tibial support 1 through a first connector 14 and a second connector 15. The two sides of the bottom of the prosthesis body 2 are snapped into the grooves 7. The middle of the bottom of the tibial support 1 is fixedly connected to the tibia through a second fixing rod 5. The middle of the top of the mounting seat 3 is provided with a first fixing rod 4 and is fixedly connected to the patella through the first fixing rod 4. The cross-sectional shape of the tibial support 1 is kidney-shaped, and the two sides of the bottom of the prosthesis body 2 are smooth and can roll back and forth inside the grooves 7.

[0030] A second slot 17 is provided in the middle of the top of the tray 16. The second connector 15 includes a second locking block 27 and a sleeve 26. The bottom of the sleeve 26 is fixedly connected to the middle of the top of the second locking block 27. The second locking block 27 is engaged and installed inside the second slot 17 and the two are connected by screw threads. A second through hole 21 is provided in the middle of the top plate 6. The sleeve 26 is inserted and installed inside the second through hole 21. Both the second locking block 27 and the second slot 17 are cylindrical.

[0031] The first connector 14 includes a first locking block 23 and a cylinder 24. The top of the cylinder 24 is fixedly connected to the middle of the bottom of the first locking block 23. A rubber column 25 is fixedly installed at the bottom of the cylinder 24. An annular baffle is fixedly installed at the top of the sleeve 26 and an annular plate is fixedly installed on the outer side of the bottom of the cylinder 24. The cylinder 24 is engaged inside the sleeve 26 to prevent it from falling off.

[0032] The bottom of the mounting base 3 has a first slot 12 and a third slot 22 arranged sequentially from the inside to the outside. The first slot 23 is engaged and installed inside the first slot 12 and the two are connected by screw threads. The base plate 13 is engaged and installed inside the third slot 22 and the two are connected by screw threads. Both the first slot 12 and the third slot 22 are circular, and the diameter of the third slot 22 is larger than the diameter of the first slot 12.

[0033] A first through hole 9 is provided in the middle of the base plate 13, and a cylinder 24 is inserted into the inside of the first through hole 9. The diameter of the first through hole 9 is smaller than the diameter of the third slot 22.

[0034] The top of the mounting base 3 has a fourth slot 28 in the middle, and a first connecting block 11 is fixedly installed in the middle of the bottom inner wall of the fourth slot 28. The wider end of the first fixing rod 4 has a first flange 10 on its outer side, and a first mounting groove 8 is opened in the middle of its wider end. The first flange 10 is engaged and installed inside the fourth slot 28, and the two are connected by screw threads. The first connecting block 11 is threaded inside the first mounting groove 8, and the top outer side of the first connecting block 11 has an external thread.

[0035] A second connecting block 18 is fixedly installed in the middle of the bottom of the tray 16, and the outer side of the bottom of the second connecting block 18 is provided with external threads. A second mounting groove 19 is provided in the middle of the top of the second fixing rod 5, and the inner wall of the bottom of the second mounting groove 19 is provided with internal threads. The second connecting block 18 is threadedly installed inside the second mounting groove 19. The top of the second fixing rod 5 is threadedly connected to the bottom of the tray 16 through the second flange 20. The shape of the second connecting block 18 is the same as the shape of the head of the second fixing rod 5.

[0036] Working principle: When using this utility model, first insert the first connecting block 11 into the first mounting groove 8, then rotate and connect it by thread. Use screws to connect the two at the overlapping points with inclined threads for reinforcement. In the same way, fix the second fixing rod 5 to the second connecting block 18. Then, engage the second locking block 27 into the second locking groove 17 and fix it with screws. Then, engage the top plate 6 on the top of the support plate 16. Engage the first locking block 23 into the first locking groove 12 and fix it with screws to complete the connection between the tibial support 1 and the prosthesis body 2. Then, fix the tibial support 1 and the prosthesis body 2 to the tibia and patella respectively by the first fixing rod 4 and the second fixing rod 5 to complete the implantation of the prosthesis.

[0037] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. Knee prosthesis with reinforcement structure, comprising a tibial tray (1), a prosthesis body (2) and a first fixation stem (4), characterized in that: The tibial support (1) comprises a support plate (16) and a top plate (6), the bottom of the top plate (6) is snap-fitted on the top of the support plate (16), the top of the top plate (6) is provided with a groove (7) on both sides, the inside of the groove (7) is bonded with a gasket, the bottom of the middle of the prosthesis body (2) is embedded with a mounting seat (3), the bottom of the mounting seat (3) is rotatably connected with the middle of the top of the tibial support (1) through a first connecting piece (14) and a second connecting piece (15), the bottom of the two sides of the prosthesis body (2) is snap-fitted in the inside of the groove (7), the bottom of the middle of the tibial support (1) is fixedly connected with the tibia through a second fixing rod (5), and the top of the middle of the mounting seat (3) is provided with a first fixing rod (4) and is fixedly connected with the patella through the first fixing rod (4).

2. The knee prosthesis with reinforcement structure according to claim 1, characterized in that: The middle of the top of the support plate (16) is provided with a second clamping groove (17), the second connecting piece (15) comprises a second clamping block (27) and a sleeve (26), the bottom of the sleeve (26) is fixedly connected with the middle of the top of the second clamping block (27), the second clamping block (27) is snap-fitted in the inside of the second clamping groove (17) and is screw-connected with the second clamping groove (17), and the middle of the top of the top plate (6) is provided with a second circular through hole (21), the sleeve (26) is inserted into the inside of the second circular through hole (21).

3. The knee prosthesis with reinforcement structure according to claim 2, characterized in that: The first connecting piece (14) comprises a first clamping block (23) and a cylinder (24), the top of the cylinder (24) is fixedly connected with the middle of the bottom of the first clamping block (23), the bottom of the cylinder (24) is fixedly provided with a rubber column (25), the top of the sleeve (26) is fixedly provided with an annular baffle, and the outer side of the bottom of the cylinder (24) is fixedly provided with an annular plate.

4. The knee prosthesis with reinforcement structure according to claim 3, characterized in that: The middle of the bottom of the mounting seat (3) is sequentially provided with a first clamping groove (12) and a third clamping groove (22) from inside to outside, the first clamping block (23) is snap-fitted in the inside of the first clamping groove (12) and is screw-connected with the first clamping groove (12), and the inside of the third clamping groove (22) is snap-fitted with a bottom plate (13) and is screw-connected with the third clamping groove (22).

5. The knee prosthesis with reinforcement structure according to claim 4, characterized in that: The middle of the bottom plate (13) is provided with a first circular through hole (9), and the cylinder (24) is inserted into the inside of the first circular through hole (9).

6. The knee prosthesis with reinforcement structure according to claim 1, characterized in that: The middle of the top of the mounting seat (3) is provided with a fourth clamping groove (28), the middle of the inner wall of the bottom of the fourth clamping groove (28) is fixedly provided with a first connecting block (11), the outer side of the wider end of the first fixing rod (4) is provided with a first flange (10), the middle of the wider end of the first fixing rod (4) is provided with a first mounting groove (8), the first flange (10) is snap-fitted in the inside of the fourth clamping groove (28) and is screw-connected with the fourth clamping groove (28), and the first connecting block (11) is screw-connected in the inside of the first mounting groove (8).

7. The knee prosthesis with reinforcement structure according to claim 1, characterized in that: The middle of the bottom of the supporting plate (16) is fixedly provided with a second connecting block (18), and the bottom of the second connecting block (18) is provided with external threads on the outer side, the top of the second fixed rod (5) is provided with a second mounting groove (19) in the middle, and the bottom inner wall of the second mounting groove (19) is provided with internal threads, the second connecting block (18) is threadedly mounted in the second mounting groove (19), and the top of the second fixed rod (5) is threadedly connected with the bottom of the supporting plate (16) through a second flange (20).

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