Bent osteotome system for knee joint revision

Abstract

The utility model relates to the technical field of medical instruments, in particular to a bent osteotome system for knee joint revision, which comprises a first bent osteotome, a second bent osteotome and a quick connector, the first bent osteotome comprises a first bent osteotome connecting part and a first bent osteotome inserting hook, the first bent osteotome connecting part is provided with a first bent osteotome quick connecting hole, and the second bent osteotome connecting part is provided with a second bent osteotome inserting hook. The quick connector is fixedly connected with the first bent osteotome in the first bent osteotome quick connecting hole, the first bent osteotome inserting hook is matched with the ML direction of the knee joint platform, the second bent osteotome comprises a second bent osteotome connecting part and a second bent osteotome inserting hook, the second bent osteotome connecting part is provided with a second bent osteotome quick connecting hole, and the second bent osteotome inserting hook is matched with the second bent osteotome quick connecting hole. The quick connector is fixedly connected with the second bent osteotome in the second bent osteotome quick connecting hole, and the second bent osteotome is inserted into the hook to be matched with the AP direction of the knee joint plateau. The system provided by the utility model can realize multi-angle operation, can realize quick connection, and is relatively simple in structure.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and in particular to a curved bone chisel system for knee joint revision surgery. Background Technology

[0002] In knee replacement surgery, the bone cement between the knee plateau and the bone surface must be completely removed to ensure the stable implantation of the new knee plateau.

[0003] Traditional bone chisels have the following problems:

[0004] 1. Limited operating direction: Straight bone chisels or single-angle designs are difficult to adapt to the complex curvature of the knee joint plateau, leading to the risk of bone cement residue.

[0005] 2. Structural redundancy: The multi-component assembly design or the overall structure is complex, resulting in high processing costs and easy loosening, which poses a risk of falling off during surgery.

[0006] Although existing technologies have disclosed bone chisels with adjustable angles, they rely on complex rotation locking structures, making them cumbersome to operate and lacking in stability. Utility Model Content

[0007] The technical problem to be solved by this utility model is to provide a curved bone chisel system for knee joint revision surgery, which can achieve multi-angle operation, can be quickly connected and has a relatively simple structure.

[0008] This utility model is achieved through the following solution:

[0009] A knee joint revision surgery system includes a first curved chisel, a second curved chisel, and a quick-connect connector. The first curved chisel includes a first curved chisel connecting portion and a first curved chisel insertion hook. The first curved chisel connecting portion is provided with a first curved chisel quick-connect hole. The quick-connect connector is fixedly connected to the first curved chisel in the first curved chisel quick-connect hole. The first curved chisel insertion hook is matched with the ML direction of the knee joint plateau. The second curved chisel includes a second curved chisel connecting portion and a second curved chisel insertion hook. The second curved chisel connecting portion is provided with a second curved chisel quick-connect hole. The quick-connect connector is fixedly connected to the second curved chisel in the second curved chisel quick-connect hole. The second curved chisel insertion hook is matched with the AP direction of the knee joint plateau.

[0010] The optimized quick-connect fitting is equipped with a quick-locking bolt at the end.

[0011] The optimized first curved bone chisel quick-connect hole has a waist-shaped structure with the front arc radius being larger than the rear arc radius.

[0012] The optimized second curved bone chisel quick-connect hole has a waist-shaped structure with the front arc radius being larger than the rear arc radius.

[0013] Furthermore, the quick-connect fitting has a protrusion, and the first curved bone chisel has a groove that matches the protrusion.

[0014] Furthermore, the quick-connect fitting has a protrusion, and the second curved bone chisel has a groove that matches the protrusion.

[0015] The optimized design features a first and second curved bone chisel that are both cut and formed as a single piece.

[0016] Beneficial effects of the utility model:

[0017] The present invention provides a curved bone chisel system for knee joint revision surgery, which has the following advantages:

[0018] 1. The multi-operation direction design allows for bone cement separation from both the ML and AP directions, resulting in less residual bone cement and facilitating subsequent removal of the knee prosthesis.

[0019] 2. It adopts an integrated and simplified structure, with the curved bone chisel being cut and shaped in one piece. Different curved bone chisels can be selected, and modular expansion can be achieved through a unified interface, reducing processing and maintenance costs.

[0020] 3. The quick-connect connector and the curved chisel adopt a quick-connect structure, which can be used as soon as you plug it in, without the need for auxiliary tools. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the assembly structure of the second curved bone chisel and quick connector of this utility model.

[0022] Figure 2 This is a schematic diagram of the first curved bone chisel structure of this utility model.

[0023] Figure 3 This is a schematic diagram of the second curved bone chisel structure of this utility model.

[0024] Figure 4 This is a schematic diagram of the quick-connector structure of this utility model.

[0025] Figure 5 This is a schematic diagram of the first curved bone chisel of this utility model in conjunction with the knee joint platform.

[0026] Figure 6 This is a schematic diagram of the second curved bone chisel of this utility model in conjunction with the knee joint platform.

[0027] In the diagram: 1. First curved bone chisel; 11. First curved bone chisel inserted into hook; 12. First curved bone chisel connecting part; 13. First curved bone chisel quick connection hole; 14. First curved bone chisel groove; 2. Second curved bone chisel; 21. Second curved bone chisel inserted into hook; 22. Second curved bone chisel connecting part; 23. Second curved bone chisel quick connection hole; 24. Second curved bone chisel groove; 3. Quick connector; 31. Quick connector locking bolt; 32. Protrusion; 4. Knee joint platform. Detailed Implementation

[0028] A curved bone chisel system for knee joint revision surgery, the assembly structure diagram is as follows: Figure 1 As shown, it includes a first curved bone chisel 1, a second curved bone chisel 2, and a quick-connect connector 3. The first curved bone chisel includes a first curved bone chisel connecting part 12 and a first curved bone chisel insertion hook 11. The first curved bone chisel connecting part is provided with a first curved bone chisel quick connection hole 13. The quick-connect connector is fixedly connected to the first curved bone chisel in the first curved bone chisel quick connection hole. The first curved bone chisel insertion hook is matched with the ML direction of the knee joint platform 4. The second curved bone chisel includes a second curved bone chisel connecting part 22 and a second curved bone chisel insertion hook 21. The second curved bone chisel connecting part is provided with a second curved bone chisel quick connection hole 23. The quick-connect connector is fixedly connected to the second curved bone chisel in the second curved bone chisel quick connection hole. The second curved bone chisel insertion hook is matched with the AP direction of the knee joint platform.

[0029] The knee revision surgery system uses two curved chisels, one from the ML direction and the other from the AP direction, to remove bone cement. This allows for multi-directional bone cement removal, significantly reducing residual bone cement and facilitating the separation of the prosthesis during surgery.

[0030] Furthermore, the two curved bone chisels can be quickly and securely connected to the quick-connect joints at the quick-connect holes, allowing bone cement to be removed from different directions. This reduces the number of connectors and assembly steps, shortens the operation time, and enables modular expansion through a unified interface, thereby reducing processing and maintenance costs.

[0031] A schematic diagram of the first curved bone chisel structure is shown below. Figure 2 As shown in the diagram, the second curved bone chisel structure is as follows: Figure 3 As shown in the diagram, the quick-connect connector structure is as follows: Figure 4 As shown in the diagram, the first curved bone chisel engages with the knee joint platform. Figure 5 As shown in the diagram, the second curved bone chisel engages with the knee joint platform. Figure 6 As shown.

[0032] The optimized quick-connect fitting is equipped with a quick-connect locking bolt 31 at the end.

[0033] The optimized quick-connect hole for the first curved bone chisel has an oblong shape with a larger arc radius at the front than at the rear. The quick-connect locking bolt on the quick connector can be inserted from the larger arc radius at the front of the quick-connect hole, then moved to the smaller arc radius at the front, and the quick-connect locking bolt is tightened, thus achieving rapid assembly of the first curved bone chisel and the quick connector.

[0034] The optimized quick-connect hole for the second curved bone chisel has an oblong shape with a larger arc radius at the front than at the rear. The quick-connect locking bolt on the quick-connect connector can be inserted from the larger arc radius at the front of the quick-connect hole, then moved to the smaller arc radius at the front, and the quick-connect locking bolt is tightened, thus achieving rapid assembly of the second curved bone chisel and the quick-connect connector.

[0035] Furthermore, the quick-connect coupling is provided with a protrusion 32, and the first curved bone chisel is provided with a first curved bone chisel groove 14 that matches the protrusion. Through the cooperation between the protrusion and the first curved bone chisel groove, the first curved bone chisel groove and the quick-connect coupling can be further locked, preventing the first curved bone chisel from separating from the quick-connect coupling due to the loosening of the quick-connect locking bolt.

[0036] Furthermore, the quick-connect coupling has a protrusion, and the second curved bone chisel has a groove 24 that matches the protrusion. Through the cooperation between the protrusion and the groove of the second curved bone chisel, the groove of the second curved bone chisel and the quick-connect coupling can be further locked, preventing the second curved bone chisel from separating from the quick-connect coupling due to the loosening of the quick-connect locking bolt.

[0037] The protrusion on the quick connector can preferably be trapezoidal in shape, with an arc-shaped chamfer at the end, so that the protrusion can slide quickly into the first and second curved bone chisel grooves for further locking.

[0038] The optimized design features a single piece of bone chisel, with both the first and second curved bone chisels being cut and formed in one piece. This makes the manufacturing process simple and quick, and the overall structure of the first and second curved bone chisels is stable.

[0039] In summary, the curved bone chisel system for knee joint revision proposed in this utility model can achieve bone cement separation from the ML and AP directions, with less bone cement residue, which is beneficial for subsequent knee joint prosthesis removal. Furthermore, it is simple to process and quick to assemble.

[0040] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A curved bone chisel system for knee joint revision surgery, characterized in that: The device includes a first curved bone chisel, a second curved bone chisel, and a quick-connect connector. The first curved bone chisel includes a first curved bone chisel connecting part and a first curved bone chisel insertion hook. The first curved bone chisel connecting part is provided with a first curved bone chisel quick-connect hole. The quick-connect connector is fixedly connected to the first curved bone chisel in the first curved bone chisel quick-connect hole. The first curved bone chisel insertion hook is matched with the ML direction of the knee joint plateau. The second curved bone chisel includes a second curved bone chisel connecting part and a second curved bone chisel insertion hook. The second curved bone chisel connecting part is provided with a second curved bone chisel quick-connect hole. The quick-connect connector is fixedly connected to the second curved bone chisel in the second curved bone chisel quick-connect hole. The second curved bone chisel insertion hook is matched with the AP direction of the knee joint plateau.

2. The curved bone chisel system for knee joint revision surgery according to claim 1, characterized in that: The quick-connector is equipped with a quick-connect locking bolt at its end.

3. The curved bone chisel system for knee joint revision surgery according to claim 2, characterized in that: The first curved bone chisel quick-connect hole has a waist-shaped structure and the arc radius at the front is larger than that at the rear.

4. A curved bone chisel system for knee joint revision surgery according to claim 2, characterized in that: The second curved bone chisel quick-connect hole has a waist-shaped structure and the arc radius at the front is larger than that at the rear.

5. The curved bone chisel system for knee joint revision surgery according to claim 1, characterized in that: The quick connector has a protrusion, and the first curved bone chisel has a groove that matches the protrusion.

6. The curved bone chisel system for knee joint revision surgery according to claim 1, characterized in that: The quick connector has a protrusion, and the second curved bone chisel has a groove that matches the protrusion.

7. A curved bone chisel system for knee joint revision surgery according to claim 1, characterized in that: Both the first and second curved bone chisels are cut and formed as a single piece.

Images