Anti-rotation bone pin in orthopedic surgery

Abstract

The utility model discloses an anti-rotation bone needle in orthopedic surgery, relates to orthopedic surgery field, include: bone needle head and bone needle body, both are cylinder and coaxial connection, at least two bone needle holes, the axis of bone needle head is provided in parallel, along the length direction of bone needle hole, a part of bone needle hole is set up in bone needle head, another part of bone needle hole forms the first gap of arc cross section on the outer circumferential surface of bone needle body, and the outer circumferential surface of bone needle body is provided with external thread, the anti-rotation bone needle is operated to bone needle head, and the bone needle body is rotated into the bone, plays the fixed anti -pullout effect, then the ordinary bone needle is implanted into the bone from the bone needle hole, and the non -cylindrical cross section is formed in the bone through multiple bone needles and bone needle body, and the anti-rotation effect is realized, the anti-rotation bone needle can reduce the surgery opening size, reduces the damage to the bone quality of patient, reduces the space occupied in the operation, makes the doctor more convenient, fast operation.

Description

Technical Field

[0001] This utility model belongs to the field of orthopedic surgery, and more specifically, relates to an anti-rotation bone needle used in orthopedic surgery. Background Technology

[0002] In orthopedic surgery, bone pins are indispensable consumables used for holding, fixing, etc. Traditional bone pins usually have a threaded structure at the head to facilitate insertion during surgery and play a role in preventing pull-out. However, a single bone pin cannot play a role in preventing rotation. Therefore, if the surgeon wants to fix a certain tool during surgery, he usually needs to insert two or more bone pins for positioning, thereby playing a role in preventing pull-out and rotation. However, inserting two bone pins increases the size of the surgical opening, increases the damage to the patient's bone, and occupies surgical space. Utility Model Content

[0003] The purpose of this invention is to address the shortcomings of existing technologies by providing an anti-rotation bone needle and its application method in orthopedic surgery. This anti-rotation bone needle, through manipulation of its head, can be screwed into the bone, providing fixation and anti-pull-out function. Then, a regular bone needle is implanted into the bone through a needle hole. Multiple bone needles and the bone needle body form a non-cylindrical cross-section within the bone, achieving anti-rotation again. Compared to traditional bone needles used for bone fixation, this anti-rotation bone needle reduces the size of the surgical incision, minimizes damage to the patient's bone, and reduces the space required during surgery, making it more convenient and faster for surgeons.

[0004] To achieve the above objectives, this utility model provides an anti-rotation bone pin for orthopedic surgery, comprising:

[0005] The bone needle head and the bone needle body are both cylindrical and coaxially connected;

[0006] At least two bone needle holes are arranged parallel to the axis of the bone needle head. Along the length direction of the bone needle holes, a portion of the bone needle holes are located on the bone needle head and penetrate the bone needle head, while another portion of the bone needle holes are located on the bone needle body and form a first notch with an arc-shaped cross-section on the outer peripheral surface of the bone needle body. External threads are provided on the outer peripheral surface of the bone needle body.

[0007] Optionally, the bone needle holes are evenly distributed circumferentially at the head of the bone needle.

[0008] Optionally, a first outward protrusion is provided between the bone needle head and the bone needle body, and the cross-section of the end of the bone needle head near the first outward protrusion is polygonal.

[0009] Optionally, a bone needle connecting portion is further provided between the first outward protrusion and the bone needle body. The bone needle connecting portion is connected to the bone needle body through the second outward protrusion. The bone needle hole is completely disposed inside the first outward protrusion and the second outward protrusion. The bone needle hole forms a second notch with an arc-shaped cross-section on the outer peripheral surface of the bone needle connecting portion.

[0010] Optionally, the end of the bone needle body near the second convex portion has a gradually expanding shape.

[0011] Optionally, there are two bone pinholes.

[0012] Optionally, when a bone needle is inserted through the bone needle hole, the two bone needles and the bone needle body form a cross-section in which the two ends of the circle intersect with the middle circle.

[0013] Optionally, the lower end of the bone needle body is provided with a conical portion.

[0014] This invention provides an anti-rotation bone pin for orthopedic surgery, with the following advantages: The anti-rotation bone pin consists of a pin head and a pin body. After the pin body is screwed into the bone and fixed, two ordinary bone pins are inserted into the bone through pin holes. As the pins enter the bone through these holes, they conform to the outer circumference of the pin body. Part of the pin is located inside the circumference of the pin body, while the other part protrudes beyond the circumference. This creates an elliptical or rectangular cross-section within the bone, preventing the rotation issues common with conventional bone pins. Furthermore, the screwing of the pin body into the bone does not create a large surgical opening. Inserting two ordinary bone pins through the pin holes does not increase the space required during surgery. Moreover, after implantation, only a portion of the pin is located on the outer circumference of the pin body, forming a non-circular cross-section without enlarging the surgical opening. This allows surgeons to perform the surgery more conveniently and quickly.

[0015] Other features and advantages of this invention will be described in detail in the following detailed description section. Attached Figure Description

[0016] The above and other objects, features and advantages of the present invention will become more apparent from the accompanying drawings, in which like reference numerals generally represent like parts.

[0017] Figure 1 A schematic diagram of the structure of an antirotation bone pin in an orthopedic surgery according to an embodiment of the present invention is shown.

[0018] Figure 2This diagram illustrates the state of an antirotation bone needle and two bone needles implanted in the bone during an orthopedic surgery according to an embodiment of the present invention.

[0019] Figure 3 It shows Figure 2 Top view.

[0020] Figure 4 A cross-sectional view is shown of an antirotation bone pin and two bone pins implanted in the bone during an orthopedic surgery according to an embodiment of the present invention.

[0021] Figure 5 A schematic diagram of a cross-section of a bone needle body and two bone needles formed on a bone according to an embodiment of the present invention is shown.

[0022] Explanation of reference numerals in the attached figures:

[0023] 1. Bone needle head; 2. Bone needle body; 3. Bone needle hole; 4. First notch; 5. External thread; 6. First external protrusion; 7. Bone needle connecting part; 8. Second external protrusion; 9. Second notch; 10. Gradually widening part; 11. Bone needle; 12. Conical part; 13. Bone. Detailed Implementation

[0024] Preferred embodiments of the present invention will now be described in more detail. While preferred embodiments of the present invention are described below, it should be understood that the present invention can be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to make the present invention more thorough and complete, and to fully convey the scope of the present invention to those skilled in the art.

[0025] This utility model provides an anti-rotation bone pin for orthopedic surgery, comprising:

[0026] The bone needle head and the bone needle body are both cylindrical and coaxially connected;

[0027] At least two bone needle holes are set parallel to the axis of the bone needle head. Along the length of the bone needle holes, part of the bone needle holes are set on the bone needle head and penetrate the bone needle head, while the other part of the bone needle holes are set on the bone needle body and form a first notch with an arc-shaped cross-section on the outer peripheral surface of the bone needle body. External threads are provided on the outer peripheral surface of the bone needle body.

[0028] Specifically, the axes of the bone needle head and the bone needle body in this anti-rotation bone needle are on the same straight line. Multiple bone needle holes are provided through the bone needle head, parallel to the axis of the bone needle head. Part of the bone needle holes also extend through the outer periphery of the bone needle body, thus forming a first notch corresponding to the bone needle holes on the outer surface of the bone needle body. External threads are provided on the other outer peripheral surfaces of the bone needle body. When this anti-rotation bone needle is implanted into the bone, the bone needle body is screwed to the bone through the external threads, thus achieving a fixed and pull-out resistant effect. After the anti-rotation bone needle is implanted in the bone, a regular bone needle is inserted into the bone along the bone needle hole. The head of the regular bone needle has no external threads and is driven into the bone by impact force and connected and fixed to the bone. When the anti-rotation bone needle is inserted in place, part of the head of the bone needle is located in the first notch, and the bone needle fits against the outer periphery of the bone needle body. The other part of the head of the bone needle protrudes from the bone needle body, changing the original circular cross-section of the bone needle body into a similar elliptical or rectangular cross-section. The anti-rotation bone needle achieves the anti-rotation effect.

[0029] Optionally, the bone needle holes are evenly distributed circumferentially at the head of the bone needle.

[0030] Optionally, there are two bone pinholes.

[0031] Optionally, when a bone needle is inserted through the bone needle hole, the two bone needles and the bone needle body form a cross-section in which the two ends of the circle intersect with the middle circle.

[0032] Specifically, the preferred number of bone needle holes on the head of the bone needle is two, and the two bone needle holes are symmetrically arranged on the circumference of the head of the bone needle, so that the bone needle holes are not concentric with the anti-rotation bone needle. After the anti-rotation bone needle is screwed into the bone, only the external thread part of the bone needle body is screwed into the bone. The first notch of the bone needle body is filled by ordinary bone needle. When the bone needle enters the anti-rotation bone needle, the bone needle not only fills the first notch, but also the bone needle part not in the first notch protrudes from the outer periphery of the bone needle body. In this way, the bone needle can form a symmetrical protruding structure on the outer periphery of the bone needle body. At this time, the cross-section of the anti-rotation bone needle fixed in the bone is similar to an ellipse or a rectangle, thus achieving the anti-rotation effect.

[0033] Optionally, a first outward protrusion is provided between the bone needle head and the bone needle body, and the cross-section of the end of the bone needle head near the first outward protrusion is polygonal.

[0034] Specifically, the first outward protrusion is located between the bone needle head and the bone needle body. When the bone needle body is screwed into the bone through the external thread, the implantation depth of the anti-rotation bone needle can be identified through the first outward protrusion. In addition, there is a section of the bone needle head with a polygonal cross-section, which facilitates the use of tools to apply force to the anti-rotation bone needle.

[0035] Optionally, a bone needle connecting part is also provided between the first outward protrusion and the bone needle body. The bone needle connecting part is connected to the bone needle body through the second outward protrusion. The bone needle hole is completely provided inside the first outward protrusion and the second outward protrusion. The bone needle hole forms a second notch with an arc-shaped cross-section on the outer peripheral surface of the bone needle connecting part.

[0036] Specifically, in addition to the first outward protrusion, a bone needle connecting part and a second outward protrusion can be provided between the bone needle body and the bone needle head. After the bone needle enters the bone needle head through the bone needle hole, it then passes through the first outward protrusion, the second notch of the bone needle connecting part, and the second outward protrusion in sequence, finally entering the first notch of the bone needle body. In the first and second outward protrusions, the bone needle is completely inside the outward protrusion. In the second notch, only a part of the bone needle is located in the second notch, while the other part of the bone needle protrudes from the outer periphery of the bone needle connecting part. The two outward protrusions and the second notch of the bone needle connecting part can make the bone needle fit more tightly with the outer surface of the bone needle body. This allows the bone needle and the anti-rotation bone needle to form a whole, forming an elliptical cross-section in the bone. This improves the fixation, pull-out resistance, and anti-rotation effect while controlling the size of the surgical opening and reducing bone damage to the patient.

[0037] Optionally, the end of the bone needle body near the second convex portion has a gradually widening shape.

[0038] Optionally, the lower end of the bone needle body is provided with a conical portion.

[0039] Specifically, the anti-rotation bone needle has a tapered shape at the upper end of its body, which improves the connection strength of the bone needle body and prevents breakage when screwed into the bone through the external thread. A conical portion is also provided at the lower end of the bone needle body, reducing resistance during implantation. Furthermore, the conical portion and the needle head circumferentially fix both ends of the bone needle body. Because multiple first notches are provided on the outer circumference of the bone needle body to accommodate part of the bone needle structure, the circumferential strength of the bone needle body is weakened, thus securing the bone needle body from both ends. This enhances the overall strength of the bone needle body, allowing it to be smoothly implanted into the bone through the external thread.

[0040] This utility model also provides a method for using an anti-rotation bone pin in orthopedic surgery. The method of using the aforementioned anti-rotation bone pin in orthopedic surgery includes:

[0041] The bone needle body is inserted into the bone by rotating the head of the bone needle.

[0042] Once the bone needle body is in place, the bone needle is inserted into the bone through the bone needle hole.

[0043] Optionally, the depth of bone needle implantation is confirmed by observing the first and second notches, and the bone needle is implanted at the bottom of the bone needle body.

[0044] Specifically, during the use of this anti-rotation bone needle, a rotational force is first applied to the polygonal prism using a tool, causing the external thread of the bone needle body to screw into the bone. Once the protruding part is in place, a regular bone needle can be inserted through the bone needle hole. The bone needle fits snugly against the first and second notches and enters the bone. In this way, the cross-section of the anti-rotation bone needle entering the bone changes from the circular shape of the bone needle body to a similar elliptical shape where the bone needle and the bone needle body fit together. Thus, the anti-rotation bone needle can achieve both anti-pull-out and anti-rotation effects.

[0045] Example

[0046] like Figures 1 to 5 As shown, this utility model provides an anti-rotation bone pin for orthopedic surgery, comprising:

[0047] The bone needle head 1 and the bone needle body 2 are cylindrical and coaxially connected;

[0048] Two bone needle holes 3 are set parallel to the axis of the bone needle head. The bone needle holes 3 are set through the interior of the bone needle head 1. The bone needle holes 3 form a first notch 4 with an arc-shaped cross-section on the outer peripheral surface of the bone needle body. The outer peripheral surface of the bone needle body 2 is provided with external threads 5.

[0049] In this embodiment, bone needle holes 3 are evenly distributed circumferentially on the bone needle head 1.

[0050] In this embodiment, a first outward protrusion 6 is provided between the bone needle head 1 and the bone needle body 2, and the cross-section of the end of the bone needle head 1 near the first outward protrusion 6 is hexagonal.

[0051] In this embodiment, a bone needle connecting part 7 is also provided between the first protrusion 6 and the bone needle body 2. The bone needle connecting part 7 is connected to the bone needle body 2 through the second protrusion 8. The bone needle hole 3 is completely disposed inside the first protrusion 6 and the second protrusion 8. The bone needle hole 3 forms a second notch 9 with an arc-shaped cross-section on the outer peripheral surface of the bone needle connecting part.

[0052] In this embodiment, the end of the bone needle body 2 near the second outward protrusion 8 is a gradually widening portion 10.

[0053] In this embodiment, when a bone needle 11 is inserted through the bone needle hole 3, the two bone needles 11 and the bone needle body 2 form a cross-section in which the two ends of the circle intersect with the middle circle.

[0054] In this embodiment, a conical portion 12 is provided at the lower end of the bone needle body 2.

[0055] This utility model also provides a method for using an anti-rotation bone pin in orthopedic surgery. The method of using the aforementioned anti-rotation bone pin in orthopedic surgery includes:

[0056] By rotating the bone needle head 1, the bone needle body 2 is screwed into the bone 13;

[0057] After the bone needle body 2 is implanted in place, the bone needle 11 is implanted into the bone 13 through the bone needle hole 3.

[0058] In this embodiment, the depth of bone needle 11 implantation is confirmed by observing the first notch 4 and the second notch 9 until the bone needle 11 is implanted into the bottom of the bone needle body 2.

[0059] In summary, this anti-rotation bone pin can be used in femoral neck fracture reduction surgery. The bone pin needs to be held on the femoral head to achieve reduction with the femoral shaft. Due to the limited space in the femoral head and the numerous surrounding muscles, this anti-rotation bone pin needs both anti-pulling and anti-rotation functions to effectively reduce the femoral head. First, the bone pin head 1 is rotated to insert the bone pin body 2 into the femoral head. The external thread 5 at the front end of the bone pin body 2 provides anti-pulling. Then, two bone pins 11 are inserted through the bone pin hole 3. After insertion, the bone pins 11 fit against the first notch 4 of the bone pin body 2. The two bone pins 11 and the bone pin body 2 combine to form a non-circular cross-section, thus achieving anti-rotation. Ultimately, this anti-rotation bone pin can effectively reduce the femoral head.

[0060] The various embodiments of the present invention have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments.

Claims

1. An antirotation bone pin for orthopedic surgery, characterized in that, include: The bone needle head and the bone needle body are both cylindrical and coaxially connected; At least two bone needle holes are arranged parallel to the axis of the bone needle head. Along the length direction of the bone needle holes, a portion of the bone needle holes are located on the bone needle head and penetrate the bone needle head, while another portion of the bone needle holes are located on the bone needle body and form a first notch with an arc-shaped cross-section on the outer peripheral surface of the bone needle body. External threads are provided on the outer peripheral surface of the bone needle body.

2. The antirotation bone pin for orthopedic surgery according to claim 1, characterized in that, The bone needle holes are evenly distributed circumferentially at the head of the bone needle.

3. The antirotation bone pin for orthopedic surgery according to claim 1, characterized in that, A first outward protrusion is provided between the bone needle head and the bone needle body, and the cross-section of the end of the bone needle head near the first outward protrusion is polygonal.

4. The antirotation bone pin for orthopedic surgery according to claim 3, characterized in that, A bone needle connecting part is also provided between the first outward protrusion and the bone needle body. The bone needle connecting part is connected to the bone needle body through the second outward protrusion. The bone needle hole is completely disposed inside the first outward protrusion and the second outward protrusion. The bone needle hole forms a second notch with an arc-shaped cross-section on the outer peripheral surface of the bone needle connecting part.

5. The antirotation bone pin for orthopedic surgery according to claim 4, characterized in that, The bone needle body has a gradually expanding shape at one end near the second external convex portion.

6. The antirotation bone pin for orthopedic surgery according to claim 1, characterized in that, There are two bone pinholes.

7. The antirotation bone pin for orthopedic surgery according to claim 6, characterized in that, When a bone needle is inserted through the bone needle hole, the two bone needles and the bone needle body form a cross-section in which the two circular ends and the middle circle intersect.

8. The antirotation bone pin for orthopedic surgery according to claim 1, characterized in that, The lower end of the bone needle body is provided with a conical part.

Images