In-vivo implantation device for femoral neck fracture

Abstract

The utility model belongs to the technical field of in-vivo implantation of fracture, and discloses an in-vivo implantation device for femoral neck fracture, which comprises a main nail, a first auxiliary nail and a second auxiliary nail, the nail heads of the main nail, the first auxiliary nail and the second auxiliary nail are connected with limit connecting plates, and the nail tails of the main nail, the first auxiliary nail and the second auxiliary nail are connected with bone nail tail limit plates. The limiting connecting plate is further provided with a fastening screw. The femoral neck fracture internal fixation device is small in size, novel in structure and convenient to use and operate, and solves the problems that the femoral neck fracture internal fixation force is dispersed, the femoral neck fracture is easy to shift and cut out and the fixation is not firm by adopting a mode of combining the limiting fixing plate, the limiting fixing sleeve and the bone nail tail limiting plate according to the symptoms of the femoral neck fracture; and the occurrence of postoperative complications such as fracture nonunion and femoral head necrosis is reduced, so that the relative complexity of surgical operation is solved, the radiation injury of medical personnel caused by X-ray fluoroscopy is reduced, and the device is suitable for popularization and application.

Description

Technical Field

[0001] The utility model belongs to the technical field of in vivo implantation of fractures, and particularly relates to an in vivo implantation device for femoral neck fractures. Background Art

[0002] At present, femoral neck fractures have always been a huge challenge for orthopedic surgeons. To date, there are still many unresolved issues in its treatment and outcome. Femoral neck fractures in young patients are mostly caused by high-energy trauma, and are often accompanied by multiple injuries, with a high incidence of avascular necrosis and bone nonunion. The treatment outcome is significantly related to the degree of injury, whether the reduction is correct, and whether the fixation is correct. Early anatomical reduction, fracture compression and firm internal fixation can promote fracture healing; currently, most domestic and even international surgeries use three hollow tension threaded screws with a diameter of 6.5 mm for internal fixation. The advantage of using three hollow tension threaded screws is that the nail body is thinner, less damage to blood supply, less space for growth, and the fracture end can be well compressed, which is conducive to healing; but the defect is that the nail body is fixed to the femoral neck through the greater trochanter, and the greater trochanter is cancellous bone, and the femoral neck is also mainly cancellous bone; the cancellous bone has poor holding power, and the nail body is in the vast and soft cancellous bone. The bone area is easy to move, resulting in loss of angular stability along the neck-shaft angle. If the broken ends grow slowly, move or bear weight relatively early, the fixation is easy to loosen or even lose, causing nonunion or femoral head necrosis. The three hollow tension screws are dispersed and the force cannot be concentrated. The patient stays in bed for a long time after surgery and cannot perform functional exercises too early. In addition, the internal fixation is prone to breakage, displacement and cutting during the recovery process, leading to complications such as nonunion of fractures and femoral head necrosis, increasing the patient's disability rate, and the patient needs a second surgery "prosthesis replacement". During the screw internal fixation surgery, repeated fluoroscopy is required to determine the position of the three guide pins, and the operation is relatively complicated.

[0003] Through the above analysis, the problems and defects of the prior art are as follows:

[0004] Current technology will generate oblique pulling force on the femoral trochanter and femoral head when implanting the implant in the femoral head, resulting in uneven contact at the fracture gap, which will lead to dispersion of fixation force, easy displacement and cutting, bone dislocation, and loose fixation, which will lead to postoperative complications such as non-union of fractures and femoral head necrosis, adding pain and burden to patients. Utility Model Content

[0005] In view of the problems existing in the prior art, the utility model provides an in vivo implantation device for femoral neck fracture.

[0006] The utility model is implemented in this way. An in vivo implantation device for femoral neck fracture comprises a main nail, a secondary nail 1 and a secondary nail 2. The main nail, the secondary nail 1 and the secondary nail 2 are connected to a limiting connecting plate at their nail heads, and the main nail, the secondary nail 1 and the secondary nail 2 are connected to a bone nail tail limiting plate at their nail tails. The limiting connecting plate is also provided with a fastening screw.

[0007] Furthermore, the main nail, auxiliary nail one and auxiliary nail two are provided with limiting fixing sleeves at the connection with the limiting connecting plate, and the limiting connecting plate is arranged at the upper side of the femoral shaft and the lower side of the femoral trochanter.

[0008] Furthermore, the main nail, auxiliary nail one and auxiliary nail two are connected through the bone nail tail limiting hole and the bone nail tail limiting plate, the bone nail tail limiting plate is set at the femoral head position, and bone nail tail limiting caps are provided at both ends of the bone nail tail limiting plate.

[0009] Furthermore, the fastening screw is arranged at the femoral shaft of the femur.

[0010] Furthermore, a bone screw cap is provided on the outer side of the limiting connecting plate.

[0011] In combination with the above technical solutions and the technical problems solved, the advantages and positive effects of the technical solutions to be protected by the utility model are as follows:

[0012] First, the utility model has a small size, novel structure, and is easy to use and operate. Aiming at the symptoms of femoral neck fracture, the utility model adopts a combination of a limiting fixation plate, a limiting fixation sleeve, and a bone nail tail limiting plate to solve the problems of dispersed force, easy displacement and cutting, and loose fixation in the internal fixation of femoral neck fracture, reduce the occurrence of postoperative complications such as non-union of fractures and femoral head necrosis, thereby solving the relative complexity of surgical operations and reducing radiation damage to medical staff caused by X-ray fluoroscopy, and is suitable for popularization and use.

[0013] The utility model aims at the symptoms of femoral neck fracture by combining a limiting fixing plate, a limiting fixing sleeve and a bone nail tail limiting plate to solve the dispersion of internal fixation force of femoral neck fracture, solve the relative complexity of surgical operation, reduce radiation damage to medical staff caused by X-ray fluoroscopy, and is suitable for popularization and use.

[0014] Second, the technical solution of the utility model fills the technical gap in the industry at home and abroad: the utility model has a small size, novel structure, and is easy to use and operate. It adopts a combination of a limiting fixation plate, a limiting fixation sleeve and a bone nail tail limiting plate to solve the problems of dispersed force, easy displacement and cutting, and loose fixation in the internal fixation of femoral neck fractures, reduce the occurrence of postoperative complications such as non-union of fractures and femoral head necrosis, and thus solve the relative complexity of surgical operations and reduce the radiation damage of medical staff to X-ray fluoroscopy, and is suitable for popularization and use. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1It is a general structural diagram of the in vivo implant device for femoral neck fracture provided by an embodiment of the utility model;

[0016] Figure 2 It is a partial structural diagram of the femoral head of the in vivo implant device for femoral neck fracture provided by the embodiment of the utility model;

[0017] Figure 3 It is a structural diagram of a bone screw of an in-vivo implant device for femoral neck fracture provided by an embodiment of the utility model;

[0018] In the figure: 1. main nail; 2. auxiliary nail 1; 3. auxiliary nail 2; 4. limiting connecting plate; 5. limiting fixing sleeve; 6. fastening screw; 7. femoral shaft; 8. femur; 9. femoral head; 10. femoral trochanter; 11. bone nail tail limiting plate; 12. bone nail tail limiting cap; 13. bone nail tail limiting hole; 14. bone nail cap. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail in combination with the embodiments below. It should be understood that the specific embodiments described here are only used to explain the utility model, and are not used to limit the utility model.

[0020] As attached Figure 1-3 As shown, an in vivo implant device for femoral neck fracture includes a main nail 1, a secondary nail 2 and a secondary nail 3, wherein the main nail 1, the secondary nail 2 and the secondary nail 3 are connected to a limiting connecting plate 4 at their nail heads, and the main nail 1, the secondary nail 2 and the secondary nail 3 are connected to a bone nail tail limiting plate 12 at their nail tails, and the limiting connecting plate 4 is also provided with a fastening screw 6.

[0021] The main nail 1 , the auxiliary nail 1 2 and the auxiliary nail 2 3 are provided with a limiting fixing sleeve 5 at the connection with the limiting connecting plate 4 . The limiting connecting plate 4 is arranged at the upper side of the femoral shaft 7 and the lower side of the femoral trochanter 10 .

[0022] The main screw 1, the auxiliary screw 1 2 and the auxiliary screw 2 3 are connected through the screw tail limiting hole 13 and the screw tail limiting plate 11. The screw tail limiting plate 11 is set at the position of the femoral head 9. The two ends of the screw tail limiting plate 11 are provided with screw tail limiting caps 12.

[0023] The fastening screw 6 is arranged at the femoral shaft 7 of the femur 8 , and a bone screw cap 14 is arranged on the outer side of the limiting connecting plate 4 .

[0024] Working principle: First, remove the bone screw cap 14, embed the main screw 1, auxiliary screw one 2 and auxiliary screw two 3 into the femur 8 until there is a small distance between the limiting connecting plate 4 and the femoral shaft 7, and then embed the bone screw tail limiting plate 11 into the appropriate position in the femoral head 9 by taking a CT image, and then embed the fastening screw 6 into the femoral shaft 4, and completely embed the main screw 1, auxiliary screw one 2 and auxiliary screw two 3 into the femur 8, so that the tail of the bone screw extends into the bone screw tail limiting hole 13, and the position of the bone screw is stabilized by the limiting fixing sleeve 5, the limiting connecting plate 4, the fastening screw 6 and the bone screw tail limiting plate 11, thereby realizing a tightly fixed connection between the femur 8 and the femoral head 9, and finally buckle the bone screw tail limiting cap 12 and the bone screw cap 14.

[0025] The application examples of the present utility model are as follows: Figure 1-3 As shown, the bone screw cap is removed, and the main screw, auxiliary screw one and auxiliary screw two are embedded into the femur until there is a small distance between the limiting connecting plate and the femoral shaft. Then, by taking a CT image, the bone screw tail limiting plate is embedded into the appropriate position in the femoral head. Then, the fastening screw is embedded into the femoral shaft, and the main screw, auxiliary screw one and auxiliary screw two are completely embedded into the femur, so that the tail of the bone screw extends into the bone screw tail limiting hole. The position of the bone screw is stabilized by the limiting fixing sleeve, the limiting connecting plate, the fastening screw and the bone screw tail limiting plate, thereby achieving a tightly fixed connection between the femur and the femoral head. Finally, the bone screw tail limiting cap and the bone screw cap are buckled.

[0026] The utility model discloses an in vivo implant device for femoral neck fracture in an application embodiment, belonging to the technical field of in vivo implantation of fracture. The utility model has small size, novel structure, and convenient operation. Aiming at the symptoms of femoral neck fracture, the utility model adopts a combination of a limiting fixing plate, a limiting fixing sleeve and a bone nail tail limiting plate to solve the problems of dispersed force, easy displacement and cutting out, and loose fixation of the internal fixation of femoral neck fracture, reduce the occurrence of postoperative complications such as non-union of fracture and femoral head necrosis, thereby solving the relative complexity of surgical operation and reducing the radiation damage of medical staff by X-ray fluoroscopy, and is suitable for popularization and use.

[0027] In the description of the present invention, unless otherwise specified, "multiple" means two or more; the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third" and the like are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0028] The above description is only a specific implementation method of the present invention, but the protection scope of the present invention is not limited thereto. Any modification, equivalent substitution and improvement made by any technician familiar with the technical field within the technical scope disclosed by the present invention and within the spirit and principle of the present invention shall be covered by the protection scope of the present invention.

Claims

1. An in vivo implant device for femoral neck fracture, characterized in that: This device includes a main nail, a secondary nail 1 and a secondary nail 2. The main nail, the secondary nail 1 and the secondary nail 2 are connected to a limiting connecting plate at their heads, and the main nail, the secondary nail 1 and the secondary nail 2 are connected to a bone screw tail limiting plate at their tails. The limiting connecting plate is also provided with a fastening screw.

2. The in vivo implant device for femoral neck fracture according to claim 1, characterized in that: The main nail, auxiliary nail one and auxiliary nail two are provided with limiting fixing sleeves at the connection with the limiting connecting plate. The limiting connecting plate is arranged at the upper side of the femoral shaft and the lower side of the femoral trochanter.

3. The in vivo implant device for femoral neck fracture according to claim 1, characterized in that: The main nail, auxiliary nail one and auxiliary nail two are connected through the bone nail tail limiting hole and the bone nail tail limiting plate. The bone nail tail limiting plate is arranged at the position of the femoral head. Bone nail tail limiting caps are arranged at both ends of the bone nail tail limiting plate.

4. The in vivo implant device for femoral neck fracture according to claim 1, characterized in that: The fastening screw is arranged at the femoral shaft position of the femur.

5. The in vivo implant device for femoral neck fracture according to claim 1, characterized in that: A bone screw cap is arranged on the outer side of the limiting connecting plate.

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