Novel screw for fracture fixation

Abstract

The utility model provides a novel screw for fracture fixation, and relates to the field of medical instruments, the novel screw comprises a screw main body and a screw nested in the main body, and the tail part of the screw is provided with a folding blocking unit so as to improve the overall stability of the screw. A first thread part is arranged in the middle of the screw, and second thread parts extend out of the two ends of the screw and used for being connected with the supporting ring, the anti-disengaging backing ring and the nut to form a stable double-thread structure. The structure can be gradually screwed in the fracture fixing process, so that the device can adapt to different bone parts, and postoperative displacement is prevented through the anti-falling part. The folding blocking unit is composed of an installation ring, an annular piece and a plurality of sets of folding plates which can be movably connected, the small fracture blocks can be pressed tightly in the installation process, and the small fracture blocks are prevented from slipping in the healing process. The device is simple in structure, convenient to disassemble and assemble, high in applicability, capable of remarkably improving the fixing effect of a fracture part, especially suitable for fixing small free fracture blocks in orthopedic surgery and capable of promoting healing.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and in particular to a novel screw for fracture fixation. Background Technology

[0002] Fracture fixation techniques play an important role in modern orthopedic surgery. Traditional fracture fixation methods often use metal plates, nails, or external fixators. While these methods have achieved certain results in the treatment of some fractures, they often have limitations when dealing with small free fragments and complex multi-segment fractures.

[0003] In the existing patent CN221617220U, a steel wire screw for fractures, a screw head is included. A screw tail is fixedly connected to the bottom of the screw head, and a mounting base is fixedly connected to the top of the screw head. A hexagonal screw groove is formed in the middle of the top side of the mounting base, and a lead screw is fixedly connected to the middle of the hexagonal screw groove. A limit block is slidably connected above the lead screw, and a fastening nut is threaded to the top of the lead screw. A steel wire groove is formed in the top of the mounting base. By using the screw head, screw tail, and steel wire groove in combination, when the use of a screw is likely to cause fracture displacement or the screw cannot be used due to fracture defects, using only the screw head can leave a steel wire channel without interfering with the fracture ends, thereby achieving a good fit with the steel plate. Moreover, when removing the internal fixation, the steel wire screw using only the screw head does not need to be unscrewed; it can be removed with the steel plate after the steel wire is removed.

[0004] The aforementioned patent structure is relatively simple and lacks adaptability. It is still inadequate in preventing the dislodgement and fixation of fracture fragments, especially when dealing with small free fracture fragments. It cannot effectively guarantee their stability and is difficult to meet the diverse requirements of fixation devices for different fracture conditions.

[0005] Based on this, the present invention provides a novel fracture fixation screw. Through its multi-segment thread design and innovative folding blocking unit structure, this device not only firmly fixes the fracture site but also effectively prevents displacement and slippage of fracture fragments postoperatively. Utility Model Content

[0006] This invention provides a novel screw for fracture fixation, which addresses the problems mentioned in the background art.

[0007] To achieve the above objectives, the present invention provides the following technical solution, comprising: a screw body and a screw, wherein the screw is installed inside the screw body, and a folding blocking unit is installed at the tail of the screw body.

[0008] Preferably, the screw has a first threaded portion in the middle and the two ends of the screw extend to form a second threaded portion.

[0009] Preferably, the support ring is connected to the second threaded portion at one end of the screw via a thread, and the anti-loosening washer and nut are installed at the second threaded portion at the other end of the screw.

[0010] Preferably, the inner wall of the screw body is provided with a threaded groove in the middle that mates with the first threaded part.

[0011] Preferably, the folding blocking unit includes: a mounting ring, which is fixedly sleeved on the end of the screw body away from the anti-detachment washer ring, and the annular component is fixedly connected to the mounting ring by a number of fixing blocks.

[0012] Preferably, several sets of folding plates are movably connected to the ring-shaped component, and each set of folding plates is installed between two fixed blocks.

[0013] Preferably, each set of folding plates has several sets of gaskets fixedly installed on its outer side wall, and each set of gaskets has a pressure block installed on it.

[0014] Preferably, the height of several groups of pressing blocks gradually decreases.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] 1. Enhance fixation and stability

[0017] Through its structural design of a screw body and an embedded screw, this screw provides dual fixation. In particular, the first threaded portion in the middle of the screw mates with the threaded groove on the inner wall of the screw body, making the entire device more stable and able to maintain long-term stability after surgery, preventing loosening.

[0018] 2. Anti-slip design enhances safety.

[0019] The device features secondary threads at both ends of the screw, ensuring the support ring, anti-dislodgement washer, and nut are securely fixed to the screw. This structure effectively prevents screw displacement at the fracture site, making it particularly suitable for prolonged postoperative bone fixation, reducing the risk of accidental dislodgement, and aiding in the bone healing process.

[0020] 3. The folding blocking unit facilitates fixation of fracture fragments.

[0021] The folding blocking unit at the rear of the device applies pressure to the fracture fragments during installation, securing them firmly. This structure effectively prevents bone fragment movement, helps keep the fractured pieces in place, and reduces the difficulty of bone reconstruction.

[0022] 4. Highly adaptable, meeting the needs of various fracture conditions.

[0023] The screw's segmented thread design allows it to adapt to fracture fragments of different locations and shapes. The flexible design of the folding plate allows for adjustment of angle and contact area, facilitating adaptation to bone shape and providing a more flexible fixation solution for surgery.

[0024] 5. Easy to assemble and disassemble, flexible operation

[0025] The combination of mounting rings and annular components in the design simplifies the assembly and disassembly of the entire device. The flexibility of the folding plate allows for adjustment, adapting it to different fracture conditions and surgical needs, thus improving surgical efficiency.

[0026] 6. Promotes bone healing

[0027] When in use, this device uses a folding plate to hold down loose fracture fragments, preventing them from dislodging during healing and thus promoting better fusion. Furthermore, the flexibility of the folding plate increases the contact area with the screws, thereby reducing local pressure on the bone and promoting faster and better healing.

[0028] In summary, this novel fracture fixation screw, through the combination of multiple functional structures, greatly improves the fixation effect of the fracture site, increases the stability and ease of operation of the device, is suitable for the effective fixation of small free fracture fragments in orthopedic surgery, and plays an important role in promoting the healing of fracture fragments. Attached Figure Description

[0029] The accompanying drawings are provided to further understand the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation thereof.

[0030] In the attached diagram:

[0031] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0032] Figure 2 This is a schematic diagram of the screw structure in this utility model;

[0033] Figure 3 This is a schematic diagram of the main structure of the screw in this utility model;

[0034] Figure 4 This is a schematic diagram of the folding blocking unit structure in this utility model;

[0035] Figure 5 This is a schematic diagram of the main structure of the folding plate in this utility model.

[0036] In the diagram: 1. Screw body; 2. Screw; 3. Folding blocking unit; 4. First threaded part; 5. Second threaded part; 6. Support ring; 7. Anti-detachment washer ring; 8. Nut; 9. Mounting ring; 10. Ring-shaped component; 11. Fixing block; 12. Folding plate; 13. Gasket; 14. Pressure block. Detailed Implementation

[0037] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0038] Furthermore, in this utility model, the use of terms such as "first" and "second" is for descriptive purposes only and does not specifically refer to any order or sequence, nor is it intended to limit the utility model. They are merely used to distinguish components or operations described using the same technical terms, and should not be construed as indicating or implying their relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions and features of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. If the combination of technical solutions is contradictory or impossible to implement, such a combination should be considered non-existent and not within the scope of protection claimed by this utility model.

[0039] This utility model provides a technical solution; please refer to [link / reference]. Figure 1-4 The device includes a screw body 1 and a screw 2. The screw 2 is installed inside the screw body 1, and a folding blocking unit 3 is installed at the tail of the screw body 1. The screw 2 is nested inside the screw body 1, which can provide more stable support during fracture fixation. The folding blocking unit 3 is located at the tail, which can prevent the movement of bone fragments or prevent the device from slipping out during installation. The above methods improve the stability of the screw, make the fixation of the fracture site more secure, reduce the risk of displacement, and increase the reliability of the fixation effect.

[0040] Furthermore, the screw 2 has a first threaded portion 4 in the middle, and second threaded portions 5 extending from both ends. The design of the screw 2 includes threads in different parts, allowing the screw to be gradually tightened during installation, thus better adapting to different bone structures. The first threaded portion 4 in the middle cooperates with and is fixed to the screw body 1, while the second threaded portions 5 at both ends are used to fix the support ring 6 and the anti-dislodgement component. This double-threaded design improves the stability of the screw and can fix bone fragments in sections, suitable for various fracture conditions, and helps to further enhance the accuracy of fixation.

[0041] Furthermore, the support ring 6 is connected to the second threaded portion 5 at one end of the screw 2 via threads. The anti-dislodgement washer 7 and nut 8 are installed on the second threaded portion 5 at the other end of the screw 2. The support ring 6, the anti-dislodgement washer 7, and the nut 8 firmly fix the fractured bone site through the second threaded portions 5 at both ends. In this way, during installation, the nut 8 can be adjusted to tighten or loosen, facilitating the stability of the fracture site. This anti-dislodgement and tightening structural design effectively prevents screw displacement after surgery, improves the safety and stability of the fixation device, and helps maintain fixation during bone healing.

[0042] Furthermore, the inner wall of the screw body 1 is provided with a threaded groove in the middle that mates with the first threaded part 4. The threaded groove inside the screw body 1 engages with the first threaded part of the screw 2, ensuring that the screw 2 is fixed within the body. In this way, when external force is applied, the threaded groove inside the body can play a stabilizing role and prevent loosening. Through the matching of the threaded groove on the inner wall with the threaded component, the device has a better load-bearing capacity and ensures that the entire device is more stable and reliable during installation and fixation, especially reducing the risk of screw loosening during fracture fixation.

[0043] Furthermore, the folding blocking unit 3 includes: a mounting ring 9, which is fixedly sleeved on the end of the screw body 1 away from the anti-dislodgement washer ring 7; and an annular component 10, which is fixedly connected to the mounting ring 9 via several sets of fixing blocks 11. The combination of the mounting ring 9 and the annular component 10 forms a reliable folding blocking unit, which can keep the folding unit stable. The folding blocking unit 3 can prevent the screw from slipping on the bone during installation, further ensuring the fixation effect. The design of the mounting ring 9 and the annular component 10 facilitates the disassembly, assembly, and adjustment of the entire device, suitable for the needs of different fracture conditions.

[0044] Furthermore, several sets of folding plates 12 are movably connected to the annular member 10, with each set of folding plates 12 installed between two fixing blocks 11. The movable connection between the folding plates 12 and the annular member 10 allows them to unfold when needed to increase the fixing force of the screws and apply pressure to small bone fragments, preventing them from falling out. This movable connection allows the folding plates to adjust to the shape of the bone, thus providing support and stability. The movable design of the folding plates 12 facilitates adjustment of the fixation method according to the specific fracture situation, effectively preventing screw loosening. Simultaneously, the flexibility of the folding plates 12 increases the contact surface of the screws during fixation, helping to reduce local pressure on the bone and promoting better and faster healing.

[0045] Furthermore, several sets of gaskets 13 are fixedly provided on the outer wall of each set of folding plates 12, and each set of gaskets 13 is equipped with a pressure block 14.

[0046] Furthermore, the height of several sets of pressure blocks 14 is gradually reduced.

[0047] Preferably, the pressure block 14 is made of a flexible and deformable compressible material.

[0048] When the folding plate 12 is unfolded, the pressure block 14 on the pad 13 can deform according to the shape of the bone, thus applying pressure to small bone fragments and providing support and stability.

[0049] Working Principle: In orthopedic surgery, the splicing and fixation of small free fracture fragments has always been a challenge. When using this device, after making holes at the surgical site and for the small free fracture fragment, the screw body 1 is inserted into the hole, and the mounting ring 9 presses down on the small free fracture fragment to prevent it from detaching from the surgical site. Then, the screw 2 is inserted into the screw body 1 and turned clockwise until the second threaded portion 5 at one end extends out of the end of the screw body 1 equipped with the folding blocking unit 3. After connecting the support ring 6 to the second threaded portion 5 of the screw 2, the screw is turned counterclockwise. As the screw 2 rotates outward along the screw body 1, the diameter of the support ring 6 is much larger than the diameter of the screw body 1. Therefore, the support ring 6 will open several sets of folding plates 12 under the action of the screw 2 until the several sets of folding plates 12 press down the small free fracture fragments. Then, the screw 2 is no longer turned. Afterward, the other end of the screw 2 is fixed to the screw body 1 by the anti-dislodgement washer ring 7 and the nut 8. The above method can help keep the small free fracture fragments fixed during the healing period, avoid accidental dislodgement, and thus promote better and faster healing.

[0050] Obviously, those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this utility model and their equivalents, this utility model also intends to include these modifications and variations.

Claims

1. A novel screw for fracture fixation, characterized in that: include: The screw body (1) and the screw (2) are installed inside the screw body (1), and a folding blocking unit (3) is installed at the tail of the screw body (1). The folding blocking unit (3) includes: a mounting ring (9), which is fixedly sleeved on the end of the screw body (1) away from the anti-detachment pad ring (7), and the ring part (10) is fixedly connected to the mounting ring (9) through several sets of fixing blocks (11); Several sets of folding plates (12) are movably connected to the ring-shaped piece (10), and each set of folding plates (12) is installed between two fixed blocks (11); The diameter of the support ring (6) is larger than the diameter of the screw body (1); Several sets of pads (13) are fixedly provided on the outer wall of each set of folding plates (12), and each set of pads (13) is equipped with a pressure block (14). The height of several sets of pressure blocks (14) gradually decreases.

2. The novel screw for fracture fixation as described in claim 1, characterized in that: The screw (2) has a first threaded part (4) in the middle and the two ends of the screw (2) extend to form a second threaded part (5).

3. The novel screw for fracture fixation as described in claim 2, characterized in that: The support ring (6) is connected to the second threaded part (5) at one end of the screw (2) by a thread, and the anti-loosening washer (7) and nut (8) are installed on the second threaded part (5) at the other end of the screw (2).

4. The novel screw for fracture fixation as described in claim 2, characterized in that: The screw body (1) has a threaded groove in the middle of its inner wall that matches the first threaded part (4).

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