A wire traction assembly for treating phalangeal avulsion fractures

Abstract

This invention provides a wire traction assembly for treating phalanx avulsion fractures, relating to the field of biomedical engineering technology. The wire traction assembly for treating phalanx avulsion fractures includes: a sleeve having a first end, a bent portion, and a second end; an insertion hole on the first end and a threading hole on the second end; a Kirschner wire for insertion into the insertion hole; and a tension band wire for attachment to the threading hole. This application achieves reliable wire fixation through direct attachment of the tension band wire to the threading hole, rather than by hanging it on the bent end of the Kirschner wire as in traditional techniques. Because the threading hole is a completely closed structure, the tension band wire cannot slip out of the hole under stress, effectively avoiding the risk of the wire slipping off at the smooth end of the needle in traditional techniques.

Description

Technical Field

[0001] This invention relates to the field of biomedical engineering technology, and in particular to a wire traction assembly for treating avulsion fractures of the finger bones. Background Technology

[0002] In hand surgery for avulsion fractures of the fingers, tension band fixation is one of the most widely used internal fixation techniques. The standard procedure typically involves inserting a Kirschner wire through the fracture fragment into the main bone to stabilize the distal interphalangeal joint. Then, a tension band wire is crisscrossed in a figure-eight pattern from the dorsal side of the fracture fragment, using the tension force of the wire to compress the avulsed bone fragment against the main bone, thus achieving compression fixation and stability of the fracture ends. In this procedure, the fixation end of the wire must form a reliable mechanical connection with the tail end of the Kirschner wire.

[0003] Traditional techniques for handling this connection typically involve the surgeon using a needle holder or Kirschner wire bending device to forcefully bend the protruding end of the Kirschner wire, which extends beyond the bone or skin, into a hook-like structure of approximately 90 to 180 degrees on the operating table. The two ends of the tension band wire are then hooked onto this bend and tightened into a knot, thus completing the tension band system. However, because the surface of the Kirschner wire is extremely smooth, and the hook-like structure formed after bending is only an open linear contact surface, the dynamic tension generated by the tension band wire during flexion and extension movements of the finger during postoperative recovery can easily cause the wire to slip off the smooth hook or even completely detach, leading to fixation failure. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and to propose a wire traction assembly for treating phalangeal avulsion fractures.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A wire traction assembly for treating phalanx avulsion fractures includes: A sleeve having a first end, a bent portion and a second end, wherein the first end has an insertion hole and the second end has a threading hole; Kirschner wires are used for insertion into the sockets. Tension band steel wire is used to attach to the threaded hole.

[0006] Preferably, the wire traction assembly for treating phalangeal avulsion fractures further includes a locking screw, the first end of which has a threaded hole, and the locking screw is threadedly connected to the threaded hole so that the end of the locking screw abuts against the outer peripheral surface of the Kirschner wire.

[0007] Preferably, the second end is further provided with a tension compensation unit, which is used to compensate for the tension of the tension band wire when the tension decreases due to slack.

[0008] Preferably, a reinforcement unit is also provided on the first end. When the tension compensation unit compensates for the tension of the tension band wire, the reinforcement unit is used to increase the friction between the reinforcement unit and the outer peripheral surface of the Kirschner wire.

[0009] Preferably, when the tension compensation unit compensates for the tension of the tension band wire, the reinforcement unit is also used to increase the friction between the reinforcement unit and the outer peripheral surface of the locking screw.

[0010] Preferably, the tension compensation unit includes a support block and a first spring. The second end is provided with a groove communicating with the threading hole. One end of the first spring is connected to the bottom surface of the groove, and the other end of the first spring is connected to one side of the support block. The other side of the support block is provided with an arc-shaped structure. When the first spring is in its natural state, the support block extends from the groove toward the center of the threading hole. When the tension band wire is pulled, the support block is used to support the knotted part of the tension band wire. At this time, the support block retracts into the groove.

[0011] Preferably, the tension compensation unit further includes a blade and a pull wire. One end of the pull wire is connected to the support block. The sleeve has a channel for the pull wire to pass through. The other end of the pull wire passes around the blade and is driven to connect to the reinforcement unit. The blade is integrally formed on the bottom surface of the groove.

[0012] Preferably, the reinforcing unit includes a second spring, an inclined block, a through groove, and a pressure block. The first end is provided with a vertical sliding groove and a horizontal sliding groove. The horizontal sliding groove communicates with the insertion hole. One end of the second spring is connected to the top surface of the vertical groove, and the other end of the second spring is connected to one end of the inclined block. The inclined surface of the inclined block and the inclined surface of the pressure block are slidably engaged. The inclined block is slidably connected in the vertical sliding groove, and the pressure block is slidably connected in the horizontal sliding groove. The end of the pull wire away from the support block is connected to the top of the inclined block. When the support block retracts into the sliding groove, the second spring is in a compressed state.

[0013] Preferably, the reinforcing unit further includes a rubber block connected to the top surface of the through groove. When the inclined block moves down, the rubber block gradually moves toward the locking screw so that the rubber block eventually abuts against the outer peripheral surface of the locking screw.

[0014] Preferably, the reinforcing unit further includes a rubber pad, which is connected to the side of the pressure block facing away from the inclined block.

[0015] Compared with the prior art, the beneficial effects of the present invention are: By directly tying the tension band wire to the suture hole, rather than hanging it on the bent end of the Kirschner wire as in traditional techniques, reliable wire fixation is achieved from a physical structure perspective. Since the suture hole is a complete closed structure, the tension band wire cannot slip out of the hole when under force, effectively avoiding the risk of the wire slipping off at the smooth end of the needle in traditional techniques. At the same time, the bend in the cannula makes the overall shape of the component smooth and without sharp corners. After insertion, it will not cause cutting abrasion to subcutaneous tissue, tendons, or skin like the bent end of a traditional Kirschner wire, significantly reducing the incidence of postoperative soft tissue irritation. In addition, the surgeon does not need to forcefully bend the rigid Kirschner wire in situ, avoiding loosening or retraction of the Kirschner wire in the bone tunnel due to bending, simplifying the surgical procedure and improving the initial stability of fixation. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of one embodiment of the wire traction assembly for treating phalanx avulsion fractures proposed in this invention during use; Figure 2 This is a schematic diagram of one embodiment of the wire traction assembly for treating phalanx avulsion fractures proposed in this invention. Figure 3 This is a schematic diagram of the initial state of another embodiment of the wire traction assembly for treating phalangeal avulsion fractures proposed in this invention; Figure 4 This is a schematic diagram of the initial state of the tension compensation unit in another embodiment of the wire traction assembly for treating phalangeal avulsion fractures proposed in this invention; Figure 5 for Figure 3 Enlarged view of the structure at point A in the image; Figure 6 This is a schematic diagram of the final state of another embodiment of the wire traction assembly for treating phalangeal avulsion fractures proposed in this invention. Figure 7 This is a schematic diagram of the final state of the tension compensation unit in another embodiment of the wire traction assembly for treating phalangeal avulsion fractures proposed in this invention. Figure 8 for Figure 6 Enlarged view of the structure at point B in the image.

[0017] In the diagram: 1. Sleeve; 11. First end; 111. Insertion hole; 12. Bending part; 13. Second end; 131. Threading hole; 2. Kirschner wire; 3. Tension band steel wire; 4. Locking screw; 5. Tension compensation unit; 51. Support block; 52. First spring; 53. Blade part; 54. Pull wire; 6. Reinforcing unit; 61. Second spring; 62. Wedge block; 621. Through groove; 63. Rubber block; 64. Pressure block; 65. Rubber pad. Detailed Implementation

[0018] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0019] The terms used in this invention, such as "upper," "lower," "left," "right," "middle," and "one," are merely for clarity of description and are not intended to limit the scope of the invention. Any changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of the invention.

[0020] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0021] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" 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 direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0022] In the description of this specification, the references to terms such as "embodiment," "one embodiment," "some implementations," "exemplary," and "one implementation," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or implementation is included in at least one embodiment or implementation of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or implementation. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or implementations.

[0023] The terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature.

[0024] Combination Figure 1 and Figure 2 As shown, an embodiment of the present invention provides a wire traction assembly for treating phalangeal avulsion fractures, comprising: Sleeve 1 has a first end 11, a bent part 12 and a second end 13. The first end 11 is provided with an insertion hole 111 and the second end 13 is provided with a wire hole 131. Kirschner wire 2 is used to be inserted into socket 111; Tension band steel wire 3 is used to be attached to the thread hole 131.

[0025] Specifically, the cannula 1 has a curved configuration, including a first end 11, a bent portion 12, and a second end 13. The first end 11 has an insertion hole 111, the diameter of which matches the outer diameter of a standard Kirschner wire 2 for insertion. The second end 13 has a threading hole 131, the diameter of which is slightly larger than the diameter of a standard medical tension band wire 3 for threading and tying the tension band wire 3. In clinical applications, this component is used... The procedure is as follows: After completing the reduction of the phalanx avulsion fracture and the implantation of the Kirschner wire 2, the surgeon cuts off the tail end of the Kirschner wire 2, leaving a straight tail end. Then, the first end 11 of the cannula 1 is inserted into the tail end of the Kirschner wire 2 through the insertion hole 111, so that the cannula 1 fits the bone surface or soft tissue below. Next, the surgeon passes the tension band wire 3 through the bone tunnel pre-drilled on the phalanx, and then passes the two free ends of the tension band wire 3 together through the thread hole 131 on the second end 13, and then pulls and knots to fix it.

[0026] In this optional embodiment, the tension band wire 3 is directly tied to the threading hole 131, instead of being hung on the bent tail of the Kirschner wire 2 as in the traditional technique. This achieves reliable fixation of the tension band wire 3 from a physical structure perspective. Since the threading hole 131 is a complete closed structure, the tension band wire 3 cannot slip out of the hole when under force, effectively avoiding the risk of the tension band wire 3 slipping off at the smooth needle tail in the traditional technique. At the same time, the bend 12 of the sleeve 1 makes the overall shape of the component smooth and without sharp corners. After insertion, it will not cause cutting abrasion to subcutaneous tissue, tendons or skin like the bent tail of the Kirschner wire 2 in the traditional technique, significantly reducing the incidence of postoperative soft tissue irritation. In addition, the surgeon does not need to forcefully bend the rigid Kirschner wire 2 in situ, avoiding the loosening or retraction of the Kirschner wire 2 in the bone tunnel due to bending, simplifying the surgical operation and improving the initial stability of fixation.

[0027] Furthermore, the wire traction assembly for treating phalangeal avulsion fractures also includes a locking screw 4, with a threaded hole on the first end 11. The locking screw 4 is threadedly connected to the threaded hole so that the end of the locking screw 4 abuts against the outer peripheral surface of the Kirschner wire 2.

[0028] Specifically, a threaded hole is provided on the side wall of the first end 11, which communicates with the insertion hole 111. The locking screw 4 has a thread that matches the threaded hole and can be screwed into the threaded hole. When the locking screw 4 is tightened, its end passes through the threaded hole and extends into the insertion hole 111, finally abutting tightly against the outer circumferential surface of the Kirschner wire 2. During the surgical procedure, after the first end 11 of the cannula 1 is inserted into the tail end of the Kirschner wire 2 through the insertion hole 111, the surgeon uses a screwdriver to tighten the locking screw 4. As the locking screw 4 is screwed in, its end gradually presses against the outer wall of the Kirschner wire 2, thereby firmly fixing the cannula 1 and the Kirschner wire 2 into a whole.

[0029] In this optional embodiment, by adding a locking screw 4, an active mechanical locking mechanism is achieved between the cannula 1 and the Kirschner wire 2. Compared with the fitting method that relies solely on the sleeve, the active mechanical locking mechanism can provide a greater axial pull-out resistance, preventing the cannula 1 from accidentally dislodging from the Kirschner wire 2 due to finger movement or soft tissue traction after surgery. At the same time, the clamping action of the locking screw 4 can also prevent the cannula 1 from rotating around the Kirschner wire 2, ensuring that the orientation of the suture hole 131 remains stable, which is beneficial to maintaining the force line of the tension band wire 3.

[0030] Combination Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 and Figure 8 Another embodiment of the present invention provides a wire traction assembly for treating phalangeal avulsion fractures, which further includes: a tension compensation unit 5 is provided on the second end 13, which is used to compensate for the tension of the tension band wire 3 when the tension of the tension band wire 3 decreases due to slack.

[0031] In this optional embodiment, a tension compensation unit 5 is provided to realize the automatic maintenance and compensation of the tension of the tension band wire 3 after surgery, thereby effectively solving the problem of weakened pressure effect caused by tension decay after traditional tension band fixation. Without the need for secondary surgical intervention, the tension compensation unit 5 can continuously resist the relaxation trend of the tension band wire 3, so that the fracture ends are always subjected to effective dynamic pressure during the healing process, which is conducive to maintaining the stable reduction of the fracture fragments, promoting callus formation, and reducing the risk of complications caused by fixation failure.

[0032] Furthermore, a reinforcing unit 6 is provided on the first end 11. When the tension compensation unit 5 compensates for the tension of the tension band steel wire 3, the reinforcing unit 6 is used to increase the friction between the reinforcing unit and the outer peripheral surface of the Kirschner wire 2.

[0033] In this optional embodiment, by linking the reinforcement unit 6 with the tension compensation unit 5, when the tension band wire 3 becomes slack, the system actively compensates for the tension of the tension band wire 3 and automatically enhances the fixing strength between the component and the Kirschner wire 2.

[0034] Optionally, when the tension compensation unit 5 compensates for the tension of the tension band wire 3, the reinforcement unit 6 is also used to increase the friction between the reinforcement unit 5 and the outer peripheral surface of the locking screw 4.

[0035] In this optional embodiment, by having the reinforcing unit 6 act on both the Kirschner wire 2 and the locking screw 4, the locking screw 4, as the core component connecting the sleeve 1 and the Kirschner wire 2, is crucial in preventing loosening. When the tension band wire 3 relaxes and triggers the reinforcing mechanism, it also prevents the locking screw 4 from loosening due to vibration or stress changes.

[0036] Furthermore, the tension compensation unit 5 includes a support block 51 and a first spring 52. The second end 13 is provided with a groove that communicates with the threading hole 131. One end of the first spring 52 is connected to the bottom surface of the groove, and the other end of the first spring 52 is connected to one side of the support block 51. The other side of the support block 51 is provided with an arc-shaped structure. When the first spring 52 is in its natural state, the support block 51 extends from the groove toward the center of the threading hole 131. When the tension band wire 3 is pulled, the support block 51 is used to support the knotted part of the tension band wire 3. At this time, the support block 51 retracts into the groove.

[0037] Specifically, the tension compensation unit 5 includes a support block 51 and a first spring 52. A groove is provided on the second end 13, which is connected to the threading hole 131. One end of the first spring 52 is fixedly connected to the bottom surface of the groove, and the other end of the first spring 52 is fixedly connected to one side of the support block 51. The other side of the support block 51 is set as an arc-shaped structure. The curvature of the arc matches the diameter of the tension band wire 3, so as to fit snugly to support the tension band wire 3. The support block 51 is slidably accommodated in the groove, and its movement direction is perpendicular to the axis of the threading hole 131. When the first spring 52 is in its natural state (i.e., not compressed or stretched), the first spring 52 pushes the support block 51 out of the groove, so that its arc-shaped end extends into the interior of the threading hole 131 and protrudes towards the center of the threading hole 131. During the surgical procedure, when the surgeon pulls the tension band wire 3 and prepares to tie a knot, a continuous pulling force is applied. At this time, the tension band wire 3 is tightened and pressed against the inner wall of the threading hole 131. The radial force it applies presses the support block 51 back into the groove, while compressing the first spring 52. When the surgeon finishes tying the knot, the knotted part of the tension band wire 3 is exactly at the outlet of the threading hole 131 and continues to press the arc-shaped end of the support block 51, keeping it in the retracted groove state. The first spring 52 remains in a compressed and stored state.

[0038] In this optional embodiment, through the cooperation of the support block 51 and the first spring 52, when the tension band wire 3 is under normal tension, the tension band wire 3 itself presses against the support block 51 to retract it, without interfering with the tension band wire 3; when the tension band wire 3 becomes loose for various reasons, the radial pressure applied to the support block 51 decreases, the compressed first spring 52 recovers, and pushes the support block 51 to extend outward. The extended support block 51 will lift the knotted part of the loose tension band wire 3, causing it to move towards the center of the thread hole 131. In effect, it is equivalent to shortening the distance between the knotted point of the tension band wire 3 and the force point of the thread hole 131, thereby tightening the tension band wire 3 again. The automatic sensing and instant compensation of the looseness of the tension band wire 3 is achieved in a purely mechanical way, without the need for any external energy or electronic components. The structure is compact and the response is reliable. Moreover, the arc-shaped structure of the support block 51 can evenly lift the tension band wire 3, avoiding local stress concentration or damage to the tension band wire 3.

[0039] Optionally, the tension compensation unit 5 also includes a blade 53 and a pull wire 54. One end of the pull wire 54 is connected to the support block 51. The sleeve 1 is provided with a channel for the pull wire 54 to pass through. The other end of the pull wire 54 passes around the blade 53 and is driven to connect with the reinforcement unit 6. The blade 53 is integrally formed on the bottom surface of the groove.

[0040] Specifically, the material of the suture 54 is selected to be a material with a certain strength but which can be cut by the blade 53, such as medical-grade polyester suture or absorbable suture.

[0041] Furthermore, the reinforcing unit 6 includes a second spring 61, an inclined block 62, a through groove 621, and a pressure block 64. The first end 11 is provided with a vertical sliding groove and a horizontal sliding groove. The horizontal sliding groove is connected to the insertion hole 111. One end of the second spring 61 is connected to the top surface of the vertical groove, and the other end of the second spring 61 is connected to one end of the inclined block 62. The inclined surface of the inclined block 62 and the inclined surface of the pressure block 64 are slidably engaged. The inclined block 62 is slidably connected in the vertical sliding groove, and the pressure block 64 is slidably connected in the horizontal sliding groove. The end of the pull wire 54 away from the support block 51 is connected to the top of the inclined block 62. When the support block 51 retracts into the sliding groove, the second spring 61 is in a compressed state.

[0042] Specifically, the reinforcement unit 6 includes a second spring 61, a wedge block 62, a through groove 621, and a pressure block 64. A vertical groove and a horizontal groove are interconnected inside the first end 11. The end of the horizontal groove is connected to the insertion hole 111. One end of the second spring 61 is fixedly connected to the top surface of the vertical groove, and the other end is fixedly connected to the upper end of the wedge block 62. The wedge block 62 is slidably installed in the vertical groove, and has an inclined surface on the side near the insertion hole 111. The pressure block 64 is slidably installed in the horizontal groove, and its end facing the wedge block 62 also has a matching inclined surface, allowing the inclined surfaces of the wedge block 62 and the pressure block 64 to slide together. The end of the pull wire 54 away from the support block 51 passes through the wire channel and is fixedly connected to the top of the wedge block 62. In the initial state (with the pull wire 54 intact and taut), the pull wire 54 applies an upward pulling force to the inclined block 62, overcoming the elastic force of the second spring 61 and holding the inclined block 62 in the upper position of the vertical groove. At this time, the inclined surface of the inclined block 62 is in partial contact with the inclined surface of the pressure block 64. The pressure block 64 is constrained by the inclined surface of the inclined block 62 to a position away from the insertion hole 111 in the horizontal groove, and no pressure is applied to the Kirschner wire 2. The second spring 61 is in a compressed state in this state, storing elastic potential energy. When the pull wire 54 is cut, the upward pulling force applied to the inclined block 62 disappears, and under the action of the elastic force of the second spring 61, the inclined block 62 moves downward along the vertical groove. As the inclined block 62 moves downward, its inclined surface slides relative to the inclined surface of the pressure block 64. The inclined surfaces cooperate to convert the vertical movement of the inclined block 62 into the horizontal movement of the pressure block 64, pushing the pressure block 64 to move along the transverse groove toward the insertion hole 111. Finally, the end of the pressure block 64 tightly abuts against the outer peripheral surface of the Kirschner wire 2.

[0043] In this optional embodiment, the vertical elastic force of the second spring 61 is efficiently converted into a horizontal clamping force through the inclined plane engagement mechanism, thereby achieving reliable clamping of the Kirschner wire 2.

[0044] Optionally, the reinforcing unit 6 also includes a rubber block 63, which is connected to the top surface of the through groove 621. When the inclined block 62 moves down, the rubber block 63 gradually moves toward the locking screw 4 so that the rubber block 63 eventually abuts against the outer peripheral surface of the locking screw 4.

[0045] In this optional embodiment, the rubber block 63 is fixedly connected to the top surface of the through groove 621, which is formed on the inclined block 62. The position and size of the through groove 621 are designed to correspond to the installation position of the locking screw 4. When the inclined block 62 is in its initial position (tightened by the pull wire 54), the rubber block 63 maintains a certain distance from the outer peripheral surface of the locking screw 4 and does not make contact. When the inclined block 62 moves downward under the drive of the second spring 61, the inclined block 62 moves downward as a whole, causing the through groove 621 and the rubber block 63 on its top surface to move downward synchronously. As the inclined block 62 continues to move downward, the rubber block 63 gradually approaches and eventually comes into close contact with the outer peripheral surface of the locking screw 4. Due to the high coefficient of friction and certain elastic deformation capacity of the rubber material, the rubber block 63, after being pressed, can generate significant frictional resistance against the locking screw 4, effectively preventing the locking screw 4 from loosening due to vibration or stress changes.

[0046] Furthermore, the reinforcing unit 6 also includes a rubber pad 65, which is connected to the side of the pressure block 64 facing away from the inclined block 62.

[0047] Specifically, the rubber pad 65 is fixedly connected to the side of the pressure block 64 facing away from the inclined block 62, that is, the end face of the pressure block 64 facing the insertion hole 111. When the pressure block 64 moves towards the insertion hole 111 under the drive of the inclined block 62, the rubber pad 65 first contacts the outer peripheral surface of the Kirschner wire 2. As the pressure block 64 continues to move, the rubber pad 65 is gradually compressed, and the contact area between it and the Kirschner wire 2 changes from the initial point contact or line contact to surface contact. The high coefficient of friction and flexibility of the rubber material enable it to closely fit the cylindrical outer surface of the Kirschner wire 2, forming a reliable friction lock.

[0048] While the present invention has been disclosed above, its scope of protection is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, and all such changes and modifications will fall within the scope of protection of the present invention.

Claims

1. A wire traction assembly for treating avulsion fractures of the finger bones, characterized in that, include: A sleeve (1) has a first end (11), a bent portion (12) and a second end (13). The first end (11) is provided with an insertion hole (111) and the second end (13) is provided with a threading hole (131). Kirschner wire (2) is used to be inserted into the socket (111); Tension wire (3) is used to attach to the thread hole (131).

2. The wire traction assembly for treating phalanx avulsion fractures according to claim 1, characterized in that, The wire traction assembly for treating phalangeal avulsion fractures also includes a locking screw (4), with a threaded hole on the first end (11), and the locking screw (4) is threadedly connected to the threaded hole so that the end of the locking screw (4) abuts against the outer peripheral surface of the Kirschner wire (2).

3. The wire traction assembly for treating phalangeal avulsion fractures according to claim 2, characterized in that, The second end (13) is also provided with a tension compensation unit (5). When the tension of the tension band wire (3) decreases due to slack, the tension compensation unit (5) is used to compensate for the tension of the tension band wire (3).

4. The wire traction assembly for treating phalanx avulsion fractures according to claim 3, characterized in that, The first end (11) is also provided with a reinforcement unit (6). When the tension compensation unit (5) compensates for the tension of the tension band wire (3), the reinforcement unit (6) is used to increase the friction between the reinforcement unit and the outer peripheral surface of the Kirschner wire (2).

5. The wire traction assembly for treating phalangeal avulsion fractures according to claim 4, characterized in that, When the tension compensation unit (5) compensates for the tension of the tension band wire (3), the reinforcement unit (6) is also used to increase the friction between the reinforcement unit (6) and the outer peripheral surface of the locking screw (4).

6. The wire traction assembly for treating phalangeal avulsion fractures according to claim 5, characterized in that, The tension compensation unit (5) includes a support block (51) and a first spring (52). The second end (13) is provided with a groove that communicates with the threading hole (131). One end of the first spring (52) is connected to the bottom surface of the groove, and the other end of the first spring (52) is connected to one side of the support block (51). The other side of the support block (51) is provided with an arc-shaped structure. When the first spring (52) is in its natural state, the support block (51) extends from the groove toward the center of the threading hole (131). When the tension band wire (3) is pulled, the support block (51) is used to support the knotted part of the tension band wire (3). At this time, the support block (51) retracts into the groove.

7. The wire traction assembly for treating phalanx avulsion fractures according to claim 6, characterized in that, The tension compensation unit (5) also includes a blade (53) and a pull wire (54). One end of the pull wire (54) is connected to the support block (51). The sleeve (1) is provided with a channel for the pull wire (54) to pass through. The other end of the pull wire (54) passes around the blade (53) and is driven to connect with the reinforcement unit (6). The blade (53) is integrally formed on the bottom surface of the groove.

8. The wire traction assembly for treating phalanx avulsion fractures according to claim 7, characterized in that, The reinforcement unit (6) includes a second spring (61), an inclined block (62), a through groove (621), and a pressure block (64). The first end (11) is provided with a vertical sliding groove and a horizontal sliding groove. The horizontal sliding groove is connected to the insertion hole (111). One end of the second spring (61) is connected to the top surface of the vertical groove, and the other end of the second spring (61) is connected to one end of the inclined block (62). The inclined surface of the inclined block (62) and the inclined surface of the pressure block (64) are slidably engaged. The inclined block (62) is slidably connected in the vertical sliding groove, and the pressure block (64) is slidably connected in the horizontal sliding groove. One end of the pull wire (54) away from the support block (51) is connected to the top end of the inclined block (62). When the support block (51) retracts into the sliding groove, the second spring (61) is in a compressed state.

9. The wire traction assembly for treating phalangeal avulsion fractures according to claim 8, characterized in that, The reinforcement unit (6) also includes a rubber block (63), which is connected to the top surface of the through groove (621). When the inclined block (62) moves down, the rubber block (63) gradually moves toward the locking screw (4) so ​​that the rubber block (63) eventually abuts against the outer peripheral surface of the locking screw (4).

10. The wire traction assembly for treating phalanx avulsion fractures according to claim 9, characterized in that, The reinforcement unit (6) also includes a rubber pad (65), which is connected to the side of the pressure block (64) facing away from the inclined block (62).

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