Tibia osteotomy guide plate

Abstract

The utility model belongs to the technical field of medical instruments, and discloses a tibia osteotomy guide plate which comprises a base body and two cantilevers fixedly arranged on the base body, a screw placing hole and an osteotomy groove are formed in the base body, a first fitting curved surface is arranged at one end of the base body, and second fitting curved surfaces are arranged on the two cantilevers. Wherein one cantilever is obliquely arranged and forms an acute angle with the other cantilever, and the obliquely arranged cantilever is arc-shaped. In the process of fitting with the tibia, damage to the human body can be reduced to the maximum extent, and postoperative recovery is facilitated.

Description

[0001] A tibial osteotomy guide plate Technical Field

[0002] The utility model belongs to the technical field of medical instruments, and relates to an osteotomy guide plate, in particular to a tibial osteotomy guide plate. Background Art

[0003] The success of total knee arthroplasty depends on the positioning, clearance and soft tissue balance of the knee joint, and all three depend on whether the position of the implanted prosthesis is accurate. Before implanting the prosthesis, it is necessary to expose the affected area in advance, and use the fitting of the guide plate and the tibia to find the osteotomy position, and then implant the prosthesis. In the prior art, the guide plate includes a main body and two cantilevers arranged on the main body. Among them, fitting surfaces are arranged on both the main body and the two cantilevers. The fitting surfaces of the two cantilevers are fitted with the upper bone surface of the tibia, and the fitting surface of the main body is fitted with the side bone surface of the tibia, and the guide plate is positioned through fitting. At present, the two cantilevers of the guide plate are arranged on the main body in parallel and symmetrically. However, when fixing the guide plate, one of the cantilevers will interfere with the patella of the human body, and it is necessary to expose the patella to accurately fix the guide plate, which not only destroys the balance of soft tissues, but also increases the exposure area and affects the postoperative recovery effect of the patient. Summary of the Utility Model

[0004] In order to solve the above-mentioned deficiencies in the prior art, the utility model aims to provide a tibial osteotomy guide plate, so as to achieve the purpose of avoiding the patella when fixing the guide plate, reducing soft tissue damage and being beneficial to the recovery of the patient.

[0005] In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows:

[0006] A tibial osteotomy guide plate includes a base body and two cantilevers fixedly arranged on the base body. The base body is provided with a screw hole and an osteotomy groove. One end of the base body is provided with a first fitting curved surface, and the two cantilevers are both provided with second fitting curved surfaces; one of the cantilevers is inclined and forms an acute angle with the other cantilever, and the inclined cantilever is arc-shaped.

[0007] As a limitation of the utility model, a calibration block is fixedly arranged on the base body, and a force line hole is penetrated through the calibration block.

[0008] As a further limitation of the utility model, the insertion hole on the limiting block is a tapered hole, and the insertion block is tapered and matched with the insertion hole.

[0009] As a further limitation of the utility model, one end of the base body provided with the first fitting curved surface is further provided with an arc-shaped concave area, and the arc-shaped concave area is recessed in the direction away from the second fitting curved surface.

[0010] As another limitation of the present utility model, a guiding block is fixedly provided at the position of the nail-setting hole on the base body, and the nail-setting hole penetrates through the guiding block.

[0011] Due to the adoption of the above technical solution, compared with the prior art, the beneficial effects obtained by the present utility model are as follows:

[0012] (1) The two cantilevers of the present utility model are symmetrically arranged non-parallelly, which is more in line with the distribution of human joints and soft tissues, can effectively avoid the patella, reduce the damage to the patella, and is beneficial to the postoperative recovery of patients;

[0013] (2) The present utility model inserts the force line rod into the force line hole on the calibration block, observes whether the force line rod points to the center of the tibial head, can verify whether the guide plate fits the tibia completely, ensure the accuracy of the osteotomy position, and at the same time, is convenient for doctors to take, and reduces the visual field occlusion, which is convenient and fast;

[0014] (3) The arc-shaped concave area of the present utility model can further avoid the patella, reduce the damage to the human body, and reduce the risk of surgery;

[0015] (4) The setting of the guiding block of the present utility model can prevent the surface of the base body from being damaged when driving the bone nail, and can extend the path of setting the nail to prevent the bone nail from tilting.

[0016] In summary, during the fitting process with the tibia, the present utility model can minimize the damage to the human body, is beneficial to postoperative recovery, and is applicable to tibial osteotomy. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The following further describes the present utility model in detail with reference to the drawings and specific embodiments.

[0018] Figure 1 It is a three-dimensional structural schematic diagram of an embodiment of the present utility model;

[0019] Figure 2 It is a top-view structural schematic diagram of an embodiment of the present utility model placed on the tibia;

[0020] Figure 3 It is a side-view structural schematic diagram of an embodiment of the present utility model placed on the tibia.

[0021] In the figure: 1. Base body; 11. First fitting surface; 12. Osteotomy groove; 2. Cantilever; 21. Second fitting surface; 3. Guiding block; 4. Nail-setting hole; 5. Calibration block; 6. Force line hole; 7. Arc-shaped concave area; 8. Bone surface on the tibia; 9. Lateral bone surface of the tibia. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] The preferred embodiments of the present utility model will be described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only for the purpose of illustrating and understanding the present utility model, and are not used to limit the present utility model.

[0023] Embodiment: A tibial osteotomy guide

[0024] As Figures 1 - 3 shown, this embodiment includes a base body 1 and two cantilevers 2 fixedly arranged on the base body 1. One end of the base body 1 fits with the tibial side bone surface 9, and one end of the two cantilevers 2 fits with the upper tibial bone surface 8. Through the fitting of the two regions, the guide is fixed on the tibia to find the osteotomy position.

[0025] The base body 1 is provided with screw holes 4 and an osteotomy groove 12, and there are two screw holes 4. One end of the base body 1 is provided with a first fitting surface 11, and the first fitting surface 11 fits with the tibial side bone surface 9. This part has the same structure as the prior art and will not be described in detail. Guide blocks 3 are fixedly arranged at the positions of the two screw holes 4 on the base body 1. Both guide blocks 3 protrude from the surface of the base body 1. The screw holes 4 penetrate through the guide blocks 3. The guide blocks 3 are used to extend the path of the screw holes 4 to prevent the bone screws from tilting during the screw placement process. One end of the base body 1 provided with the first fitting surface 11 is also provided with an arc-shaped recessed area 7. The arc-shaped recessed area 7 and the first fitting surface 11 are respectively located on both sides of one end of the base body 1. The recessed part of the arc-shaped recessed area 7 is an arc surface and recesses away from the first fitting surface 11, forming a gap with the tibial side bone surface 9 for avoiding the human patella.

[0026] A calibration block 5 is also fixedly arranged on the base body 1. The calibration block 5 is arranged at one end of the base body 1 where the guide blocks 3 are fixed, and the calibration block 5 protrudes from the surface of the base body 1, which is convenient for doctors to take. A force line hole 6 is penetrated through the calibration block 5 for inserting a force line rod to verify the accuracy of the guide fixation.

[0027] Second fitting surfaces 21 are arranged on both of the two cantilevers 2, and the second fitting surfaces 21 fit with the upper tibial bone surface 8. The two cantilevers 2 in this embodiment are not arranged in a parallel and symmetric manner. One of the cantilevers 2 is arranged obliquely, forming an acute angle between the two cantilevers 2. And the obliquely arranged cantilever 2 is arc-shaped, and the arc of the cantilever 2 bends away from the other cantilever 2 for avoiding the human patella.

[0028] When using this embodiment, the first fitting surface 11 of the base body 1 is attached to the upper bone surface 8 of the patient's tibia. At this time, the second fitting surfaces 21 of the two cantilevers 2 are attached to the side bone surface 9 of the patient's tibia. Then, two bone nails are driven into the two nail holes 4 to fix the guide plate. Finally, the force line rod is inserted into the force line hole 6 of the calibration block 5, and it is observed whether the force line rod points to the center of the tibial head. If it points to the center of the tibial head, the osteotomy position can be determined according to the osteotomy groove 12 on the guide plate, and osteotomy is performed along the osteotomy groove. If it does not point to the center of the tibial head, the guide plate needs to be removed and remade.

[0029] It should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the above embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the above embodiments or perform equivalent replacements on some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A tibial osteotomy guide plate, characterized in that: It includes a base and two cantilevers fixed on the base, the base is provided with a nail hole and an osteotomy groove, one end of the base is provided with a first fitting curved surface, and the two cantilevers are provided with a second fitting curved surface; one of the cantilevers is tilted and forms an acute angle with the other cantilever, and the tilted cantilever is arc-shaped.

2. The tibial osteotomy guide plate according to claim 1, characterized in that: A calibration block is fixedly arranged on the base body, and a force wire hole is penetrated through the calibration block.

3. A tibial osteotomy guide plate according to claim 2, characterized in that: An arc-shaped recessed area is also provided on one end of the base body provided with the first fitting curved surface, and the arc-shaped recessed area is recessed in a direction away from the second fitting curved surface.

4. A tibial osteotomy guide according to any one of claims 1 to 3, characterized in that: A guide block is fixedly arranged at a position where the nail placement hole is arranged on the base body, and the nail placement hole penetrates the guide block.

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