A type of orthopedic bone screw

Abstract

This application relates to an orthopedic bone screw, belonging to the technical field of medical devices. It includes a first threaded segment, a screw head, and a nut. One end of the first threaded segment is fixedly connected to the screw head. The nut is installed on the end of the first threaded segment away from the screw head. Multiple helical winglets are fixed on the first threaded segment. The helical winglets are fixed in the threaded groove of the first threaded segment. The helical winglets rotate in the same direction as the first threaded segment. With the bottom surface of the threaded groove as a reference, the end of the helical winglet screwed in is lower than the end of the helical winglet screwed out. This application has the effect of improving stability.

Description

Technical Field

[0001] This application relates to the technical field of medical devices, and in particular to an orthopedic bone screw. Background Technology

[0002] As people's lives develop faster and faster, medical standards become more and more advanced, and orthopedic surgeries are becoming more and more common. Among orthopedic surgeries, the most common is the surgery for limb fractures.

[0003] Typical limb fracture surgeries use bone screws and plates to tighten and fix the fracture site, assisting in the healing of the fracture and the reduction of surrounding soft tissues.

[0004] Regarding the aforementioned technologies, the inventors believe that there is a risk of loosening after bone screw implantation. If the screw becomes loose, it will no longer provide pressure and tightening, which may cause the internal fixation surgery to fail. The bone growth and healing will be unsatisfactory, and if the healing result is seriously affected, a second surgery will be required, which will increase the patient's pain and has the defect of poor stability. Summary of the Invention

[0005] To improve stability, this application provides an orthopedic bone screw.

[0006] This application provides an orthopedic bone screw with the following technical solution:

[0007] An orthopedic bone screw includes a first threaded segment, a screw head, and a nut. One end of the first threaded segment is fixedly connected to the screw head, and the nut is installed on the end of the first threaded segment away from the screw head. Multiple helical winglets are fixed on the first threaded segment. The helical winglets are fixed in the threaded groove of the first threaded segment. The helical winglets rotate in the same direction as the first threaded segment. With the bottom surface of the threaded groove as a reference, the end of the helical winglet screwed in is lower than the end of the helical winglet screwed out.

[0008] By adopting the above technical solution, when it is necessary to install bone screws, a hole is first drilled, and then the bone screws are screwed in. During the screwing process, the lower end of the spiral wing is screwed in. After screwing is completed, the end of the spiral wing that is screwed out is higher than the end that is screwed in. The spiral wing will hold the bone screw in place, so the bone screw is not easy to screw out and therefore not easy to loosen, thereby improving the stability of the bone screw and achieving the effect of improving stability.

[0009] Optionally, one end of the spiral wing is screwed into the first threaded section, the screwed-in end of the spiral wing is flush with the bottom surface of the thread groove of the first threaded section, the screw-out end of the spiral wing is completely exposed outside the first threaded section, and the screw-out end of the spiral wing is embedded in the thread groove of the first threaded section.

[0010] By adopting the above technical solution, the bottom surface of the threaded groove of the first threaded section is flush with the screw-in end of the spiral wing, which facilitates the installation of the bone screw and the screw-in of the spiral wing. The screw-out end of the spiral wing is completely exposed outside the first threaded section. After the bone screw is installed, the spiral wing will hold the bone screw in place, making it difficult for the bone screw to be screwed out, thereby improving stability.

[0011] Optionally, the screw head is provided with a self-tapping groove, which is formed on the side wall of the screw head.

[0012] By adopting the above technical solution, when it is necessary to screw in bone screws, it is usually necessary to pre-drill holes before screwing in the bone screws. However, the self-tapping groove design makes the screw head protrude, allowing the bone screws to be screwed in directly, avoiding pre-drilling and achieving a convenient and quick result.

[0013] Optionally, a second threaded segment is provided between the first threaded segment and the nut. One end of the second threaded segment is fixedly connected to the end of the first threaded segment away from the nut head, and the other end of the second threaded segment is fixedly connected to the nut. The axes of the second threaded segment and the first threaded segment are completely coincident.

[0014] By adopting the above technical solution, one end of the second threaded segment is fixedly connected to the first threaded segment, and the other end of the second threaded segment is fixedly connected to the nut. The second threaded segment makes the overall length of the bone screw longer and the application range of the bone screw wider, thereby increasing the application range of the bone screw.

[0015] Optionally, the second threaded section is provided with a tapered thread, with one end of the tapered thread facing the screw head, and the direction of the tapered thread is the same as that of the thread in the first threaded section.

[0016] By adopting the above technical solution, when using bone screws, the second threaded section is rotated and installed simultaneously with the first threaded section. After the bone screw is installed, the pointed end of the tapered thread faces the screw head, so the other end of the tapered thread will lock the bone screw, making the bone screw more stable and achieving the effect of improving stability.

[0017] Optionally, the projection of the tapered thread along the length of the first thread segment in the horizontal plane completely covers the projection of the thread on the second thread segment along the length of the first thread segment in the horizontal plane.

[0018] By adopting the above technical solution, the tapered thread is larger than the thread on the second thread section. Therefore, the tapered thread will hold the bone screw in place, making the bone screw more stable and achieving the effect of improving stability.

[0019] Optionally, the first threaded segment, the second threaded segment, the screw head, and the nut are all made of titanium alloy.

[0020] By adopting the above technical solutions, titanium alloy materials have excellent mechanical properties and are less likely to cause adverse reactions after being implanted in the human body, thus achieving better medical results.

[0021] Optionally, the first threaded section, the second threaded section, the screw head, and the nut are covered with a hydroxyapatite coating.

[0022] By adopting the above technical solution, the hydroxyapatite coating can promote the healing and growth of bone tissue, thereby improving the medical effect and achieving better medical results.

[0023] Optionally, two self-tapping slots are provided, and the two self-tapping slots are arranged opposite each other.

[0024] By adopting the above technical solution, the two self-tapping grooves make it easier to screw in the bone screws, thus facilitating the installation of bone screws.

[0025] Optionally, the helical flanks are spaced apart in the first threaded section.

[0026] By adopting the above technical solution, the spiral wing spacing is set, which reduces the installation of spiral wing during the production of bone screws without affecting the stability of the bone screw, thus achieving a convenient and quick effect.

[0027] In summary, this application includes at least one of the following beneficial technical effects:

[0028] 1. The design of the first thread segment, thread head, nut, helical side wings, and tapered thread improves stability.

[0029] 2. The self-tapping groove design achieves a convenient and quick result;

[0030] 3. The addition of a second threaded section increases the usability of the bone screw. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application;

[0032] Figure 2 yes Figure 1 A magnified view of part A in the diagram.

[0033] In the diagram, 1 is the first threaded section; 2 is the screw head; 3 is the nut; 4 is the helical side wing; 5 is the self-tapping groove; 6 is the second threaded section; and 7 is the tapered thread. Detailed Implementation

[0034] The following is in conjunction with the appendix Figure 1-2 This application will be described in further detail.

[0035] This application discloses an orthopedic bone screw.

[0036] Reference Figure 1 An orthopedic bone screw includes a nut 3, a first threaded section 1, and a screw head 2. The screw head 2 is used to install the bone screw, and the first threaded section 1 and the nut 3 together are used to improve the stability of the bone screw.

[0037] Reference Figure 1 and Figure 2 The screw head 2 is conical in shape and has two self-tapping grooves 5. Both self-tapping grooves 5 are located on the side wall of the screw head 2 and their length direction is the same as that of the screw head 2. The two self-tapping grooves 5 are arranged opposite each other. When installing the bone screw, the screw head 2 is screwed in, and the protruding edge of the self-tapping groove 5 is the screw-in end. The self-tapping grooves 5 make it easier to install the bone screw.

[0038] The length direction of the first threaded segment 1 is the same as the length direction of the screw head 2. The first threaded segment 1 and the screw head 2 are fixedly connected at the end away from their pointed cones. The first threaded segment 1 is provided with multiple helical side wings 4. The helix direction of the multiple helical side wings 4 is the same as the helix direction of the first threaded segment 1. The multiple helical side wings 4 are all fixedly connected to the first threaded segment 1. The first helical side wings 4 are all strip-shaped. The multiple helical side wings 4 are all fixed in the thread groove of the first threaded segment 1. The multiple helical side wings 4 are arranged along the thread groove of the first threaded segment 1. The multiple helical side wings 4 are all fixed at the bottom of the thread groove of the first threaded segment 1. The multiple helical side wings 4 are spaced apart, with a thread groove of the first threaded segment 1 between two adjacent helical side wings 4.

[0039] The screw-in end of the spiral wing 4 is embedded in the bottom of the thread groove of the first threaded section 1. The screw-in end of the spiral wing 4 is flush with the bottom of the thread groove of the first threaded section 1. The screw-out end of the spiral wing 4 is completely exposed to the bottom of the thread groove of the first threaded section 1. When it is necessary to install the bone screw, the first threaded section 1 is rotated and screwed in at the same time. After installation, the screw-out end of the spiral wing 4 will lock the bone screw, thereby improving the stability of the bone screw.

[0040] Reference Figure 1 The first threaded segment 1 is provided with a second threaded segment 6 at the end away from the screw head 2. The length direction of the second threaded segment 6 is the same as that of the first threaded segment 1. One end of the second threaded segment 6 and the end away from the screw head 2 are fixedly connected. The nut 3 and the end away from the first threaded segment 1 are fixedly connected. The axes of the second threaded segment 6 and the second threaded segment 6 are completely coincident.

[0041] The second threaded section 6 is provided with a tapered thread 7, with the pointed end of the tapered thread 7 facing the screw head 2. The tapered thread 7 and the thread of the first threaded section 1 have the same direction of rotation. The tapered thread 7 and the thread on the first threaded section 1 are connected together. The spacing of the tapered thread 7 is the same as the spacing of the thread on the first threaded section 1. When the first threaded section 1 is perpendicular to the horizontal plane, the projection of the tapered thread 7 along the length of the first threaded section 1 on the horizontal plane completely covers the projection of the thread of the first threaded section 1 along the length of the first threaded section 1 on the horizontal plane. When it is necessary to install the bone screw, the first threaded section 1 is rotated, the first threaded section 1 is screwed in, and the second threaded section 6 is screwed in accordingly, thereby completing the installation of the bone screw. The setting of the tapered thread 7 makes the bone screw less prone to movement, making the bone screw more stable.

[0042] Reference Figure 1 The second threaded section 6, the screw head 2, and the nut 3 are all made of titanium alloy. Titanium alloy has excellent mechanical properties and is less likely to cause adverse reactions after being implanted in the human body, thus resulting in better medical effects. The surfaces of the first threaded section 1, the second threaded section 6, the screw head 2, and the nut 3 are covered with a hydroxyapatite coating. The hydroxyapatite coating comes into contact with the bone and can promote the healing and growth of bone tissue, thus resulting in better medical effects.

[0043] The implementation principle of an orthopedic bone screw according to an embodiment of this application is as follows: When a bone screw is needed, one end of the screw head 2 is aligned with the position where the bone screw needs to be installed, and the screw head 2 is rotated along the direction of rotation of the first thread segment 1. Under the action of the self-tapping groove 5, the bone screw is screwed in. The helical side wing 4 and the tapered thread 7 on the first thread segment 1 make the bone screw more stable.

[0044] The embodiments described in this specific implementation are 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. An orthopedic bone screw, characterized by: The utility model provides a threaded rod, including first threaded section (1), screw head (2) and nut (3), first threaded section (1) one end and screw head (2) fixed connection, nut (3) is installed in the first threaded section (1) one end away from screw head (2), a plurality of helical flanges (4) are fixed on the first threaded section (1), and the helical flange (4) is fixed in the thread groove of the first threaded section (1), and the helical flange (4) is the same as the helical flange (4) and the rotation direction of the first threaded section (1), and the helical flange (4) is screwed into one end lower than the helical flange (4) and is screwed out one end with the bottom surface of the thread groove of the first threaded section (1) as the benchmark.

2. The orthopedic bone screw of claim 1, wherein: The screw head (2) is provided with a self-tapping groove (5) on the side wall of the screw head (2).

3. The orthopedic bone screw of claim 1, wherein: The first threaded section (1) and the nut (3) are provided with a second threaded section (6), one end of the second threaded section (6) is fixedly connected to the first threaded section (1) away from the screw head (2), the other end of the second threaded section (6) is fixedly connected to the nut (3), and the axis of the second threaded section (6) and the first threaded section (1) is completely coincident.

4. The orthopedic bone screw of claim 3, wherein: The second threaded section (6) is provided with a tapered thread (7), and the tapered thread (7) is provided with a tapered thread (7).

5. An orthopedic bone screw as defined in claim 4, wherein: The projection of the tapered thread (7) in the horizontal plane along the length direction of the first threaded section (1) completely covers the projection of the thread on the second threaded section (6) in the horizontal plane along the length direction of the first threaded section (1).

6. The orthopedic bone screw of claim 3, wherein: The first threaded section (1), the second threaded section (6), the screw head (2) and the nut (3) are all made of titanium alloy material.

7. An orthopedic bone screw as defined in claim 6, wherein: The first threaded section (1), the second threaded section (6), the screw head (2) and the nut (3) are all covered with a hydroxyapatite coating.

8. The orthopedic bone screw of claim 2, wherein: The self-tapping groove (5) is provided with two self-tapping grooves (5) oppositely arranged.

9. The orthopedic bone screw of claim 1, wherein: The helical flanges (4) are arranged at intervals in the first threaded section (1).

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