Door-shaped nail

Abstract

The utility model relates to the technical field of medical instruments, in particular to a door-shaped nail which comprises a cross beam and a pair of nail legs arranged on the cross beam and distributed at intervals, and a plurality of holes are formed in the outer walls of the peripheries of the nail legs and distributed in the outer walls of the nail legs. According to the door-shaped nail, the plurality of holes are formed in the four outer surfaces of the nail leg, and the design of the holes aims at promoting growth and ingrowth of bone tissues, so that the bonding strength and stability between the door-shaped nail and a skeleton are improved, and in this way, the door-shaped nail can be better fused with the surrounding bone tissues, so that the fixing stability of the door-shaped nail is improved, and the service life of the door-shaped nail is prolonged. The possibility of loosening of the door-shaped nail is effectively reduced, and the success rate of an operation and the rehabilitation effect of a patient are improved.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of medical devices, in particular to a door-shaped nail. BACKGROUND

[0002] In anterior cruciate ligament reconstruction surgery, a special fixing device, the door-shaped nail, is used to ensure the stability and firmness of the reconstructed ligament, thereby helping the patient recover the function and stability of the knee joint. The door-shaped nail is usually made of biocompatible materials such as polylactic acid (PLA) or metal alloys to ensure that it does not cause adverse reactions in the body. Its unique design has a "door" structure that can effectively fix the ligament graft, which not only improves the success rate of the operation but also shortens the patient's recovery time. During the operation, the doctor will insert the door-shaped nail into the end of the bone tunnel, and through its unique "door" structure, it will firmly grasp the graft, ensuring stability; the graft can then function as it should within the knee joint, helping to restore the stability and integrity of the anterior cruciate ligament. The door-shaped nail of the prior art has the risk of loosening and falling during a long working process, which can easily cause harm to the patient by a second operation, so further improvement is needed. CONTENT OF THE UTILITY MODEL

[0003] In order to improve the fixing stability of the door-shaped nail, the application provides a door-shaped nail.

[0004] The door-shaped nail provided by the application adopts the following technical scheme:

[0005] A door-shaped nail, comprising a crossbeam and a pair of nail legs arranged on the crossbeam and spaced apart, the outer wall of the nail leg is provided with a hole, and a plurality of holes are arranged on each outer wall of the nail leg.

[0006] By adopting the above technical scheme, a plurality of holes are arranged on the four outer surfaces of the nail leg, and the design of these holes aims to promote the growth and ingrowth of bone tissue, thereby improving the bonding strength and stability between the door-shaped nail and the bone. In this way, the door-shaped nail can better fuse with the surrounding bone tissue, thereby improving the fixing stability of the door-shaped nail, effectively reducing the possibility of loosening of the door-shaped nail, and improving the success rate of the operation and the recovery effect of the patient.

[0007] Preferably, the hole is a triangular hole.

[0008] By adopting the above technical scheme, the hole is a triangular hole, so that the nail leg has a triangular hollow structure, which not only provides sufficient space for bone tissue growth but also maintains the overall structural strength of the nail leg.

[0009] Preferably, the upper end face of the crossbeam is provided with an inclined threaded hole, the other end of which extends to the upper outer wall of the nail leg, and the crossbeam is provided with a screw threaded into the threaded hole, the screw penetrating the bone tissue.

[0010] By adopting the above technical solution, after the nail leg is hammered into the tibia, the operator will use a bone drill to make a pilot hole in the bone tissue within the threaded hole to ensure the accuracy of the hole position and the appropriate depth. Then, by tightening the screw, the screw partially penetrates into the pilot hole under the action of the threaded hole. The addition of screws further reinforces the portal nail, effectively reducing surgical risks, improving the success rate of the operation, and helping patients to recover normal motor function as soon as possible. The threaded hole is set at an angle, which not only increases the friction during fixation but also makes the installation process simpler and faster.

[0011] Preferably, the outer sidewalls of the two nail legs that are far apart from each other are provided with stepped portions, and multiple stepped portions are provided and distributed along the length direction of the nail legs.

[0012] By adopting the above technical solution, steps are added to the outer wall of the nail leg. These steps not only increase the structural strength of the nail leg, but also provide better grip during installation.

[0013] Preferably, the end of the nail leg away from the crossbeam has a chamfer, making the end of the nail leg away from the crossbeam a pointed tip.

[0014] By adopting the above technical solution, the end of the nail leg away from the crossbeam is pointed, which makes it easier for the nail leg to penetrate into the tibia.

[0015] Preferably, the lower end face of the crossbeam is provided with a conical spike located between the two spike legs.

[0016] By adopting the above technical solution, the conical spike can effectively penetrate and fix in the bone tissue, so that the ligament can be more firmly attached to the portal screw, further enhancing the fixation effect between the portal screw and the ligament. The presence of the conical spike not only improves the reliability of ligament fixation, but also effectively prevents the ligament from slipping or loosening during exercise.

[0017] Preferably, the conical spikes are provided in multiple forms.

[0018] In summary, this utility model has the following beneficial effects:

[0019] 1. Multiple holes are made on the four outer surfaces of the pin legs. These holes are designed to promote the growth and ingrowth of bone tissue, thereby improving the bonding strength and stability between the pin and the bone. In this way, the pin can better integrate with the surrounding bone tissue, thereby improving the fixation stability of the pin, effectively reducing the possibility of loosening of the pin, and improving the success rate of the operation and the patient's recovery.

[0020] 2. The holes are triangular, giving the nail legs a triangular hollow structure, which not only provides enough space for bone tissue growth, but also maintains the overall structural strength of the nail legs;

[0021] 3. After the nail leg is hammered into the tibia, the operator will use a bone drill to make a pilot hole in the threaded hole to ensure the accuracy of the hole position and the appropriate depth. Then, by turning the screw, the screw will partially penetrate into the pilot hole under the action of the threaded hole. The addition of screws further reinforces the portal screw, effectively reducing surgical risks, improving the success rate of the operation, and helping patients to recover normal motor function as soon as possible. The threaded hole is set at an angle, which not only increases the friction during fixation, but also makes the installation process simpler and faster. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of a door-type nail;

[0023] Figure 2 This is a top view of the beam's structure.

[0024] Figure 3 This is a cross-sectional diagram of a door-shaped nail.

[0025] In the diagram, 1 is the crossbeam; 11 is the extension; 12 is the conical spike; 13 is the threaded hole; 2 is the nail leg; 21 is the chamfer; 22 is the step; 23 is the hole; 3 is the screw; and 31 is the rotating groove. Detailed Implementation

[0026] The following is in conjunction with the appendix Figures 1-3 This application will be described in further detail.

[0027] This application discloses a door-type nail, referring to... Figure 1 , Figure 2 The system includes a crossbeam 1 and a pair of spaced-apart nail legs 2 disposed on the crossbeam 1. In this embodiment, the two nail legs 2 are respectively fixedly connected to the lower end face of one side of the crossbeam 1, and the outer side walls of the two nail legs 2 that are far apart from each other are flush with the outer side walls of both sides of the crossbeam 1. The nail legs 2 and the crossbeam 1 are integrally formed, and the other two outer side walls of the crossbeam 1 are integrally fixed with extensions 11, so that the cross section of the crossbeam 1 has a cross structure, thereby increasing the surface area of ​​the crossbeam 1.

[0028] Reference Figure 1The lower end face of both the crossbeam 1 and the extension 11 is provided with a conical spike 12 located between the two nail legs 2. Multiple conical spikes 12 are provided. The conical spikes 12 can effectively penetrate and fix in the bone tissue, so that the ligament can be more firmly attached to the portal nail, further enhancing the fixation effect between the portal nail and the ligament. The presence of the conical spikes 12 not only improves the reliability of fixing the ligament, but also effectively prevents the ligament from slipping or loosening during the movement.

[0029] Reference Figure 1 , Figure 3 The cross-section of the nail leg 2 is square. The end of the nail leg 2 away from the crossbeam 1 has a chamfer 21, making the end of the nail leg 2 away from the crossbeam 1 a pointed tip, which facilitates the nail leg 2 being driven into the bone tissue. The outer side walls of the two nail legs 2 that are far apart from each other are provided with stepped portions 22. Multiple stepped portions 22 are provided and distributed along the length direction of the nail leg 2. The stepped portions 22 not only increase the structural strength of the nail leg 2, but also provide better grip during installation.

[0030] Holes 23 are provided on all four outer walls of the nail leg 2. There are multiple holes 23 distributed on each outer wall of the nail leg 2. The holes 23 are triangular holes, which makes the nail leg 2 have a triangular hollow structure. This not only provides enough space for bone tissue to grow, but also maintains the overall structural strength of the nail leg 2.

[0031] The upper end face of the crossbeam 1 is provided with an inclined threaded hole 13. The other end of the threaded hole 13 extends to the upper outer wall of the nail leg 2. The crossbeam 1 is provided with a screw 3 threadedly connected to the threaded hole 13. The screw 3 passes through the bone tissue. The upper end of the screw 3 is coaxially provided with a rotating groove 31. The cross section of the rotating groove 31 is polygonal.

[0032] The implementation principle of a portal screw in this application embodiment is as follows: During anterior cruciate ligament reconstruction surgery, the ligament is placed between the legs 2 of the portal screw, and the upper end face of the crossbeam 1 is hammered to allow the legs 2 to penetrate into the tibia from the tip. Subsequently, the operator uses a bone drill to drill a bottom hole in the threaded hole 13 to ensure the accuracy of the hole position and the appropriate depth. Then, a tool is inserted into the turning groove 31 of the screw 3, and the screw 3 is turned by the tool. Under the action of the threaded hole 13, the screw 3 partially penetrates into the bottom hole. The hole 23 on the legs 2 is designed to promote the growth and ingrowth of bone tissue, thereby improving the bonding strength and stability between the portal screw and the bone, allowing the portal screw to better fuse with the surrounding bone tissue, thereby improving the fixation stability of the portal screw and effectively reducing the possibility of the portal screw loosening. In addition, the screw 3 further reinforces the portal screw, effectively reducing surgical risks, improving the success rate of the surgery, and helping patients to recover normal motor function as soon as possible.

[0033] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A type of door nail, characterized in that: It includes a crossbeam (1) and a pair of nail legs (2) arranged on the crossbeam (1) and spaced apart. Holes (23) are provided on the outer walls of the nail legs (2). There are multiple holes (23) and they are distributed on each outer wall of the nail legs (2).

2. The door-type nail according to claim 1, characterized in that: The hole (23) is a triangular hole.

3. The door-type nail according to claim 1, characterized in that: The upper end face of the crossbeam (1) is provided with an inclined threaded hole (13), and the other end of the threaded hole (13) extends to the upper outer wall of the nail leg (2). The crossbeam (1) is provided with a screw (3) threaded to the threaded hole (13), and the screw (3) passes through the bone tissue.

4. A door-type nail according to claim 1, characterized in that: Both of the two nail legs (2) have stepped portions (22) protruding from their outer sidewalls, which are far apart from each other. Multiple stepped portions (22) are provided and distributed along the length direction of the nail legs (2).

5. A door-type nail according to claim 1, characterized in that: The end of the nail leg (2) away from the crossbeam (1) has a chamfer (21) so that the end of the nail leg (2) away from the crossbeam (1) is pointed.

6. A door-type nail according to claim 1, characterized in that: The lower end face of the crossbeam (1) is provided with a conical spike (12) located between the two nail legs (2).

7. A door-type nail according to claim 6, characterized in that: The conical spikes (12) are provided in multiple forms.

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