An interface screw

Abstract

The utility model relates to the field of medical apparatus and instruments discloses an interface screw, include: drive rod, nail body, set up in one end of drive rod, be provided with self -breaking recess between nail body with drive rod, self -breaking recess surrounds drive rod and extends, the utility model can place the nail body stable, efficient in target position, be favorable to guarantee the fixed effect of nail body when long -time use, improve medical operation efficiency.

Description

Technical Field

[0001] This utility model relates to the field of medical devices and discloses an interface screw. Background Technology

[0002] When the anterior and posterior cruciate ligaments of the human knee joint are damaged, the damaged ligaments need to be reconstructed and fixed. Currently, clinicians commonly use interface screws to fix the ligaments in the bone tunnel by compression.

[0003] However, current procedures for implanting interface screws are relatively cumbersome, time-consuming, and difficult to stably place. Furthermore, the ligaments of the knee joint bear significant forces during movement, making unstable interface screws prone to displacement during postoperative recovery, losing their fixation function and negatively impacting the patient's recovery. Therefore, there is an urgent need for an interface screw that can be stably and efficiently implanted. Utility Model Content

[0004] The purpose of this utility model is to provide an interface screw to solve one or more technical problems existing in the prior art, and at least provide a beneficial option or create conditions.

[0005] An interface screw according to a first aspect of the present invention includes: a drive rod; a nail body disposed at one end of the drive rod, wherein a self-breaking groove is provided between the nail body and the drive rod, and the self-breaking groove extends around the drive rod.

[0006] This technical solution has at least the following beneficial effects: the nail body and the drive rod are connected as one unit in the initial use state. During use, the nail body can be easily placed into the target position in the body through the drive rod, such as inserting the nail body into the human bone tunnel. By operating the drive rod, the nail body can be firmly installed to compress ligaments or tendon soft tissues. After the nail body is installed, bending or continuously applying torque to the drive rod will increase the stress at the self-break groove. If the stress exceeds the maximum stress it can withstand, it will break. Then the drive rod can be removed. In this way, the nail body can be stably and efficiently placed into the target position, which is conducive to ensuring the fixation effect of the nail body during long-term use and improving the efficiency of medical surgery.

[0007] According to some embodiments of this utility model, a first channel is provided inside the drive rod, and a second channel is provided inside the nail body, with the first channel and the second channel communicating with each other.

[0008] According to some embodiments of the present invention, the end of the drive rod is provided with a drive head, the drive head is connected to the second channel, and the self-breaking groove is formed at the connection between the drive head and the drive rod.

[0009] According to some embodiments of the present invention, a pressing member is provided in the nail body, and when the driving head moves along the second channel, it can press the pressing member out of the nail body.

[0010] According to some embodiments of the present invention, a first through hole communicating with the second channel is provided on the outer side of the nail body, and multiple first through holes are provided around the nail body, with the top pressing member formed on the side of the multiple first through holes near the driving rod.

[0011] According to some embodiments of the present invention, a plurality of the top pressing members are respectively formed with guide slopes on the side near the second channel, and the plurality of guide slopes are respectively inclined toward the nail body axis in a direction away from the driving rod.

[0012] According to some embodiments of the present invention, a second through hole communicating with the second channel is provided on the outer side of the nail body, and multiple second through holes are provided on the outer side of the nail body. The top pressing member is inserted into each of the multiple second through holes. The driving head is located on the outer side of the end of the second channel and forms a conical surface. When the driving head moves along the second channel, the conical surface abuts against the ends of the multiple top pressing members.

[0013] According to some embodiments of the present invention, at least two of the top pressing members are staggered relative to each other along the length direction of the nail body.

[0014] According to some embodiments of the present invention, a narrowing section is provided in the second channel, the narrowing section being located on the side away from the drive rod relative to the top pressing member, and the inner diameter of the narrowing section gradually decreasing in the direction away from the drive head.

[0015] According to some embodiments of this utility model, the outer side of the nail body is provided with threads.

[0016] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly explained below. Obviously, the described drawings are only a part of the embodiments of this utility model, and not all of them. Those skilled in the art can obtain other design schemes and drawings based on these drawings without creative effort.

[0018] Figure 1 This is a perspective view of one embodiment of the present utility model.

[0019] Figure 2This is a schematic diagram of the cross-sectional structure along the axis of the drive rod in Embodiment 2 of this utility model.

[0020] Figure 3 This is a schematic diagram of the cross-sectional structure along the axis of the drive rod in Embodiment 3 of this utility model.

[0021] Figure 4 This is a schematic diagram of the cross-sectional structure along the axis of the drive rod in Embodiment 4 of this utility model, in which the drive head is inserted into the second channel.

[0022] Figure 5 This is a schematic diagram of the cross-sectional structure along the axis of the drive rod in Embodiment 4 of this utility model, in which the drive head separates out the second channel.

[0023] Figure 6 This is a schematic diagram of the cross-sectional structure along the axis of the drive rod in Embodiment 5 of this utility model.

[0024] In the attached diagram: 100-drive rod, 110-first channel, 120-drive head, 121-conical surface, 200-nail body, 210-second channel, 220-pressing component, 221-guide slope, 230-narrowing section, 300-self-breaking groove. Detailed Implementation

[0025] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0026] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0027] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "first" or "second" is used in the description, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0028] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0029] In the description of this application, unless otherwise expressly specified and limited, the terms "set up," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0030] In the description of this application, the use of terms such as "one embodiment," "some embodiments," "an example," "some instances," "some embodiments," "illustrative embodiment," "example," "specific example," and "some examples" indicates that the specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0031] Reference Figure 1 According to a first aspect embodiment of the present invention, an interface screw includes a drive rod 100 and a nail body 200 in one embodiment. The nail body 200 is disposed at one end of the drive rod 100, and a self-breaking groove 300 is provided between the nail body 200 and the drive rod 100. The self-breaking groove 300 extends around the drive rod 100. Since the self-breaking groove 300 makes it easy to cut off the nail body 200 from the drive rod 100, the outer diameter formed at the location of the self-breaking groove 300 is naturally small, which facilitates the separation of the nail body 200 from the drive rod 100 when force is applied.

[0032] As described above, the nail body 200 and the drive rod 100 are connected as one unit in the initial use state. During use, the drive rod 100 can be used to easily insert the nail body 200 into the target position in the body, such as inserting the nail body 200 into the human bone tunnel. By operating the drive rod 100, the nail body 200 can be firmly installed to compress ligaments or tendons. After the installation of the nail body 200 is completed, bending or continuously applying torque to the drive rod 100 will increase the stress at the self-break groove 300. If the stress exceeds the maximum stress it can withstand, it will break. Then the drive rod 100 can be removed. In this way, the nail body 200 can be stably and efficiently placed into the target position, which is beneficial to ensuring the fixation effect of the nail body 200 during long-term use and improving the efficiency of medical surgery.

[0033] In practical applications, the nail body 200 and the drive rod 100 can be made of one or more of the following materials that can be used for implantation in the human body: stainless steel, titanium, titanium alloy, polyetheretherketone, polysulfone, magnesium, lithium, strontium, zinc, iron, calcium, magnesium-based alloy, lithium-based alloy, strontium-based alloy, zinc-based alloy, iron-based alloy, calcium-based alloy, magnesium-containing compound, lithium-containing compound, strontium-containing compound, zinc-containing compound, iron-containing compound, calcium-containing compound, bone morphogenetic protein, collagen, silk protein, cellulose, chitosan, polyurethane, polyester, polylactic acid, vitamin D, glucosamine hydrochloride, glucosamine sulfate, chondroitin, etc.

[0034] like Figure 2 As shown in Embodiment 2, the drive rod 100 has a first channel 110, and the nail body 200 has a second channel 210, with the first channel 110 and the second channel 210 communicating with each other. During medical surgery, a guide wire can be inserted through the second channel 210 and the first channel 110, allowing the nail body 200 to smoothly and quickly reach the bone tunnel position along the guide wire, thus improving operational efficiency.

[0035] The nail body 200 and the drive rod 100 can be integrally formed, in which case the self-breaking groove 300 is directly formed between the nail body 200 and the drive rod 100; alternatively, the nail body 200 and the drive rod 100 can be a separate assembly structure, in which case the self-breaking groove 300 is formed on either the drive rod 100 or the nail body 200. Figure 3As shown, in Embodiment 3, a structure for connecting to the nail body 200 is formed on the drive rod 100, and a self-breaking groove 300 is formed at this connection structure. Specifically, a drive head 120 is provided at the end of the drive rod 100, the drive head 120 is connected to the second channel 210, and the self-breaking groove 300 is formed at the connection between the drive head 120 and the drive rod 100. In use, the drive head 120 is inserted into the first channel 110, which connects the screw body 200 and the drive rod 100 together. At this time, guide wires can also be inserted into the second channel 210 and the first channel 110. The guide wires can be used to quickly guide the screw body 200 to the bone tunnel position. By operating the drive rod 100, the screw body 200 can be implanted into the bone tunnel. After the screw body 200 is implanted in place, bending or continuously applying torque to the drive rod 100 will increase the stress at the self-break groove 300, exceeding the maximum stress that can be supported. The connection between the drive head 120 and the drive rod 100 will break. Then the drive rod 100 is removed, and the screw body 200 and the drive head 120 are left inside the bone tunnel, completing the interface screw implantation surgery.

[0036] To further improve the reliability of the nail body 200 at the target position, in this embodiment, a pressing member 220 is provided inside the nail body 200. When the driving head 120 moves along the second channel 210, it can press the pressing member 220 out of the nail body 200. When the driving head 120 is inserted into the second channel 210, it can be relatively positioned in the second channel 210 by relying on the friction between the driving head 120 and the second channel 210, or by the driving head 120 and the second channel 210 in a straight, cross, or polygonal form. In this way, by using the relative positioning of the driving head 120 and the driving rod 100, after the driving head 120 is installed in place, the driving head 120 is pushed into the second channel 210. At this time, the driving head 120 presses the pressing member 220 out of the nail body 200, and the pressing member 220 increases the compressive stress on the target position, thereby further improving the fixing effect of the nail body 200 at the target position.

[0037] The pressing member 220 can have various structural forms that protrude outward from the nail body 200, for example, Figure 4 and Figure 5 As shown in Embodiment 4, the nail body 200 has a first through hole communicating with the second channel 210 on its outer side. Multiple first through holes surround the nail body 200, and the sides of these first through holes near the drive rod 100 respectively form the pressing member 220. At this time, one side of the pressing member 220 is connected to the nail body 200 at the position of the through hole. When the drive head 120 presses against the pressing member 220, the pressing member 220 can deflect outwards around the position where it connects to the through hole, protruding outwards from the first through hole onto the outer side of the nail body 200, achieving the effect of squeezing the target position.

[0038] To enhance the outward pushing effect of the pressing member 220 when the driving head 120 moves within the second channel 210, in this embodiment, each of the multiple pressing members 220 has a guide slope 221 formed on the side near the second channel 210. The guide slopes 221 are inclined towards the axis of the nail body 200 in a direction away from the driving rod 100. The multiple guide slopes 221 form a space within the second channel 210 that gradually narrows in a direction away from the driving rod 100. When the driving head 120 moves within the second channel 210 to further press against the multiple guide slopes 221, the driving head 120 applies force to the multiple guide slopes 221, causing the pressing member 220 to deflect outward, thereby protruding the pressing member 220 outward from the outside of the nail body 200 and achieving compression at the target position.

[0039] like Figure 6 As shown, in Embodiment 5, a second through hole communicating with the second channel 210 is provided on the outer side of the nail body 200. Multiple second through holes are provided on the outer side of the nail body 200, and the top pressing member 220 is inserted into each of the multiple second through holes. The driving head 120 is located on the outer side of the end of the second channel 210 and forms a conical surface 121. When the driving head 120 moves along the second channel 210, the conical surface 121 abuts against the ends of the multiple top pressing members 220. At this time, the nail body 200 protrudes out of the nail body 200 in a radially movable manner within the second through hole. When the driving head 120 moves within the second channel 210, the driving head 120 presses the end of the pressing member 220 located in the second through hole through the tapered surface 121 on the outer side of its end. As the driving head 120 moves further, the pressure of the tapered surface 121 on the pressing member 220 gradually increases, thereby causing the pressing member 220 to protrude out of the nail body 200 in a radially movable manner, thus achieving the squeezing of the target position.

[0040] Multiple pressure members 220 are arranged around the nail body 200. In this case, the pressure members 220 can be located at the same position along the length of the nail body 200, but in this embodiment, at least two pressure members 220 are staggered along the length of the nail body 200. The pressure members 220 provide driving force at different positions along the length of the nail body 200, thus providing compressive force at different depths at the target position, thereby further improving the reliability of fixing the nail body 200 at the target position.

[0041] Furthermore, a narrowing section 230 is provided within the second channel 210. The narrowing section 230 is located on the side away from the drive rod 100 relative to the pressing member 220, and the inner diameter of the narrowing section 230 gradually decreases in the direction away from the drive head 120. After the drive head 120 pushes the pressing member 220 outward into place, the drive head 120 reaches the narrowing section 230 and abuts against the inner wall of the narrowing section 230, thereby preventing the drive head 120 from moving further within the second channel 210 and preventing the drive head 120 from extending from the other end of the second channel 210.

[0042] Naturally, the nail body 200 is positioned at the target location within the body. The outer side of the nail body 200 has a fixation structure; specifically, the outer side of the nail body 200 is threaded. For example, the thread can be a full thread, half thread, single-start thread, multi-start thread, fixed-pitch thread, or tapered thread, etc. The nail body 200 is securely positioned at the target location through the outer thread, making it difficult to dislodge and effectively ensuring the surgical treatment effect.

[0043] The preferred embodiments of the present invention have been described in detail above. However, the present invention is not limited to the embodiments described. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present invention. All such equivalent modifications or substitutions are included within the scope defined by the claims of this application.

Claims

1. An interface screw, characterized in that: include: Drive lever (100); A nail body (200) is disposed at one end of the drive rod (100), and a self-breaking groove (300) is provided between the nail body (200) and the drive rod (100), the self-breaking groove (300) extending around the drive rod (100).

2. The interface screw according to claim 1, characterized in that: The drive rod (100) has a first channel (110) and the nail body (200) has a second channel (210), and the first channel (110) and the second channel (210) are interconnected.

3. The interface screw according to claim 2, characterized in that: The end of the drive rod (100) is provided with a drive head (120), the drive head (120) is connected to the second channel (210), and the self-breaking groove (300) is formed at the connection between the drive head (120) and the drive rod (100).

4. The interface screw according to claim 3, characterized in that: A pressing member (220) is provided inside the nail body (200). When the driving head (120) moves along the second channel (210), it can press the pressing member (220) out of the nail body (200).

5. An interface screw according to claim 4, characterized in that: The nail body (200) has a first through hole connected to the second channel (210) on its outer side. Multiple first through holes are provided around the nail body (200), and the top pressure member (220) is formed on the side of the multiple first through holes near the drive rod (100).

6. The interface screw according to claim 5, characterized in that: Each of the multiple pressing members (220) has a guide slope (221) formed on the side near the second channel (210), and the multiple guide slopes (221) are inclined toward the axis of the nail body (200) in a direction away from the drive rod (100).

7. An interface screw according to claim 4, characterized in that: The nail body (200) has a second through hole connected to the second channel (210) on its outer side. Multiple second through holes are provided on the outer side of the nail body (200). The top pressing member (220) is inserted into each of the multiple second through holes. The driving head (120) has a tapered surface (121) formed on the outer side of the end of the second channel (210). When the driving head (120) moves along the second channel (210), the tapered surface (121) abuts against the ends of the multiple top pressing members (220).

8. An interface screw according to claim 4, characterized in that: At least two of the top pressing members (220) are staggered relative to each other along the length direction of the nail body (200).

9. An interface screw according to claim 4, characterized in that: The second channel (210) is provided with a narrowing section (230), which is located on the side away from the drive rod (100) relative to the top pressure member (220), and the inner diameter of the narrowing section (230) gradually decreases in the direction away from the drive head (120).

10. An interface screw according to claim 1, characterized in that: The nail body (200) has threads on its outer side.

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