Flexible bone implant and application method thereof

Abstract

The invention relates to the technical field of medical instruments, and provides a flexible bone implant and an application method thereof.The flexible bone implant comprises multiple base bodies, a flexible sleeve, an elastic rope, a pull rope and a supporting piece, the multiple base bodies are arranged in the flexible sleeve, and the adjacent base bodies are connected through universal balls; the elastic rope is connected in series with the plurality of substrates; the pull rope is connected in series with the plurality of base bodies; the number of the supporting pieces is at least two, and the two supporting pieces are connected with the two pull ropes. According to the invention, the base bodies are connected through the universal ball heads, so that the base bodies can rotate relatively to realize posture adjustment, and the special-shaped bone fracture part can be implanted conveniently; the pull rope is further tightened, the base bodies can swing, so that the flexible bone implant is better attached to the inner wall of the bone, the freedom degree of the side, where the pull rope is arranged, of the flexible bone implant is achieved, then the supporting piece is further implanted, the side edge of the supporting piece corresponds to the center line of the base body, rigidity in the cross direction can be enhanced, and therefore the rigidity of the flexible bone implant is improved. Therefore, the fixation of the fracture part is realized.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and in particular to a flexible bone implant and its application method. Background Technology

[0002] Fractures are common in the human body due to external forces or conditions such as osteoporosis. In such cases, fixation with instruments is usually necessary to promote healing and restore the fractured area to its original function. Currently, intramedullary nailing or external plate fixation are commonly used for fracture fixation. Intramedullary nailing is widely used because it is less likely to cause complications such as local pain and swelling, and it results in smaller incisions and faster recovery.

[0003] For example, the invention patent with the existing authorization announcement number CN109925040B discloses an intramedullary nail, which belongs to the field of medical devices. It includes a nail body, which includes a guide section and a locking section connected together. The outer diameter of the locking section gradually increases from the implantation end of the nail body to the tail end of the nail body. The outer peripheral surface of the locking section is provided with an anti-rotation thread, and the pitch of the anti-rotation thread gradually decreases from the implantation end to the tail end.

[0004] The above-mentioned technical solution discloses an intramedullary nail. Intramedullary nails are usually inserted into the bone and then locked and fixed by locking screws. However, since existing intramedullary nails are usually cylindrical or arc-shaped, their applicability is limited. For example, the clavicle has an overall S-shaped structure, and existing intramedullary nails cannot be inserted and used. Therefore, it is necessary to improve existing intramedullary nails for irregular bones such as the clavicle to meet treatment needs. Summary of the Invention

[0005] In view of this, the present invention proposes a flexible bone implant that is easy to implant and suitable for fixing heteromorphic bone fractures, as well as its application method, to solve the problem that existing intramedullary nails are not suitable for the treatment of heteromorphic bone fractures.

[0006] The technical solution of this invention is implemented as follows: On one hand, the present invention provides a flexible bone implant, comprising a base, a flexible sleeve, an elastic cord, a tension cord, and a support plate, wherein, Multiple substrates are provided inside the flexible sleeve, and adjacent substrates are connected by universal ball joints; The flexible sleeve may or may not have external threads at its end; Multiple substrates are connected by elastic ropes so that they support each other. Multiple bases are connected by a pull rope, and two pull ropes are arranged opposite each other; There are at least two support plates. The two support plates and two pull ropes are arranged in a cross shape based on the cross section of the base, and the side of the support plate corresponds to the center line of the base.

[0007] Based on the above technical solutions, the preferred embodiment also includes a guide ball head, a tensioning mechanism, and a locking mechanism, wherein... The guide ball head is connected to a base located at the end of the flexible sleeve; The tensioning mechanism and locking mechanism are located at the other end of the flexible sleeve; The tensioning mechanism is connected to the end of the tension rope. The tensioning mechanism is used to pull the tension rope to adjust the relative posture between multiple substrates. The locking mechanism holds the base body and is used to lock multiple base bodies.

[0008] Based on the above technical solutions, preferably, it also includes a carrier, which comprises an inner cylinder, a central plate, and end plates, wherein... The inner cylinder is inserted into the interior of the flexible sleeve, and the tensioning mechanism is located inside the wall of the inner cylinder; The center plate is located inside the inner cylinder, and the locking mechanism is located on the center plate. The ratio of the diameter of the center plate to the thickness of the inner cylinder wall is 2:1 to 3:1; The end plate is set on the outer wall of the inner cylinder and abuts against the end of the flexible sleeve.

[0009] Based on the above technical solutions, preferably, the tensioning mechanism includes a threaded column, a threaded cylinder, and a hexagonal sleeve, and the locking mechanism includes a top block and a threaded rod, wherein... The threaded post is located at the end of the pull rope; The threaded cylinder is rotatably mounted inside the wall of the inner cylinder, and the threaded cylinder and the threaded column are connected by threads; The hexagonal sleeve is positioned at the end of the threaded post furthest from the pull rope; The top block slides into the inner cylinder and supports the base. The threaded rod is connected to the center plate by a threaded connection, and one end of the threaded rod is connected to the top block.

[0010] Based on the above technical solutions, preferably, the matrix has a stepped columnar structure, and the matrix includes a first part and a second part, wherein... One end of the first part is set as a ball head; The second part is connected to the other end of the first part, and the diameter of the second part is larger than the diameter of the first part; The second part has a conical concave surface at the end furthest from the first part, and a ball groove is provided at the center of the conical concave surface; The second part has a guide groove on its circumference, and the end of the guide groove facing the first part is designed with a flared structure.

[0011] Based on the above technical solutions, preferably, the elastic rope runs through the first part and the second part, and the pull rope runs through the second part.

[0012] Based on the above technical solutions, preferably, it also includes a tensioning block, and a positioning groove is provided on the end face of the second part; The tension block is fitted onto the pull rope, with each end of the tension block abutting against the second part of a base, and one end abutting against the positioning groove.

[0013] Based on the above technical solutions, preferably, multiple tensioning blocks are provided, which are connected in series on the pull rope and correspond to the first part; Multiple tension blocks are divided into two groups, with one group of tension blocks being laid out towards the center via the end of a pull rope; Another set of tensioning blocks is laid out towards the center via the other end of another rope; The two sets of tension blocks form an overlapping area in the middle of the rope.

[0014] Based on the above technical solutions, preferably, the flexible sleeve is provided with an arc-shaped baffle, which is made of plastic metal material. The arc-shaped baffle fits the inner wall of the flexible sleeve and corresponds to the guide groove.

[0015] On the other hand, the present invention provides a method for implanting the above-mentioned flexible bone implant, comprising the following steps: S1. Determine the implantation point on the end of the limb bone, connect the bone drill to the power unit, open the medullary cavity of the deformed bone, and remove bone fragments and other foreign objects after the opening is completed. S2. Connect the base body in series with elastic ropes and tension ropes, then place it into the flexible sleeve, and connect the guide ball head, tensioning mechanism, locking mechanism and carrier. S3. By setting one end of the guide ball head, the entire body is inserted into the medullary cavity, and the posture of the matrix is ​​pre-adjusted by pulling the rope through the tensioning mechanism. S4. Insert the support piece into the matrix and pull the rope again to adjust the position of the matrix, so that the matrix is ​​pressed against the inner wall of the medullary cavity and holds the support piece tightly. S5. Adjust the locking mechanism to compress multiple substrates, making the flexible bone implant rigid.

[0016] The flexible bone implant and its application method of the present invention have the following advantages over the prior art: By setting multiple substrates in a flexible sleeve and connecting them with universal ball joints, the substrates can rotate relative to each other, thereby achieving posture adjustment and facilitating implantation into the fracture site of an abnormal bone. Further tightening of the pull cord allows the multiple substrates to swing, thus better conforming to the inner wall of the bone and achieving freedom of movement on the pull cord side of the flexible bone implant. Then, a support plate is implanted, with its side edge aligned with the centerline of the substrate, achieving rigidity reinforcement in the intersecting directions. This improves the rigidity of the flexible bone implant, making it rigid overall and thus achieving fixation of the fracture site. By setting up a tensioning mechanism and a locking mechanism, the tensioning mechanism facilitates the tightening of the tension rope, thereby facilitating the attitude adjustment of multiple bases and making the multiple bases press against each other to increase rigidity; by setting up a locking mechanism, the multiple bases can be further supported more stably, thereby further increasing the reliability of the structure. By setting up a carrier consisting of an inner cylinder, a central plate, and an end plate, a tensioning mechanism and a locking mechanism can be integrated simultaneously. The ratio of the diameter of the central plate to the wall thickness of the inner cylinder is set to 2:1 to 3:1, which ensures the rigidity of the carrier and guarantees the compactness of the integrated mechanism, making its application reliable. The tensioning mechanism is equipped with a hexagonal sleeve, and the locking mechanism is equipped with a threaded rod. Both can be easily rotated and adjusted from the end during application, thus achieving the tensioning of the cable and the clamping of the base. This has the advantages of convenient operation, and the operation area is concentrated, allowing for quick adjustment. The substrate is designed as a stepped columnar structure, which facilitates connection with the adjacent substrate through the first part with the ball head and enables posture adjustment. At the same time, the substrate is provided with guide grooves, which facilitates the insertion of support plates, thereby enhancing the structural strength of this flexible bone implant. Tensioning blocks are placed between two adjacent substrates. After several substrates are pressed together, the tensioning blocks are compressed, thereby further ensuring the radial structural strength of this flexible bone implant. At the same time, the tensioning blocks are connected in series by a rope, which can prevent the tensioning blocks from dislodging and helps to ensure the stability of the overall structure. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a perspective view of the flexible bone implant of the present invention; Figure 2 This is a structural diagram of the end face of the flexible bone implant of the present invention; Figure 3 For the present invention Figure 2 Sectional view along the AA direction; Figure 4 For the present invention Figure 3 Enlarged view of the structure at point A in the middle; Figure 5 For the present invention Figure 3 Enlarged view of the structure at point B; Figure 6 For the present invention Figure 3 Enlarged view of the structure at point C; Figure 7 This is a front view of the flexible bone implant of the present invention; Figure 8 For the present invention Figure 7 Cross-sectional view along the BB direction; Figure 9 For the present invention Figure 8 Enlarged view of the structure at point D; Figure 10 For the present invention Figure 8 Cross-sectional view along the CC direction; Figure 11 This is a structural diagram of the tensioning block layout of the flexible bone implant of the present invention; Figure 12 This is a three-dimensional view of the internal structure of the flexible bone implant of the present invention; Figure 13 This is an exploded view of the flexible bone implant of the present invention; Figure 14 This is a perspective view of the substrate of the flexible bone implant of the present invention; Figure 15 A schematic diagram of the structure of the flexible sleeve of the flexible bone implant of the present invention having a threaded portion; In the diagram: 1. Matrix; 11. First part; 12. Second part; 101. Conical concave surface; 102. Ball groove; 103. Guide groove; 104. Positioning groove; 2. Flexible sleeve; 21. Arc-shaped baffle; 22. Threaded part; 3. Elastic rope; 4. Pull rope; 5. Support plate; 6. Guide ball head; 7. Tensioning mechanism; 71. Threaded column; 72. Threaded cylinder; 73. Hexagonal sleeve; 8. Locking mechanism; 81. Top block; 82. Threaded rod; 9. Carrier; 91. Inner cylinder; 92. Center plate; 93. End plate; 10. Tensioning block. Detailed Implementation

[0019] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0020] like Figures 1-15 As shown, the flexible bone implant of the present invention includes a base 1, a flexible sleeve 2, an elastic rope 3, a pull rope 4, a support plate 5, a guide ball head 6, a tensioning mechanism 7, a locking mechanism 8, a carrier 9, and a tensioning block 10.

[0021] like Figures 1-5 , Figure 8 and Figure 9As shown in the figure, multiple base bodies 1 are provided inside the flexible sleeve 2, and adjacent base bodies 1 are connected by universal ball joints; elastic ropes 3 are connected in series with multiple base bodies 1 so that multiple base bodies 1 support each other; As described above, multiple base bodies 1 are provided in the flexible sleeve 2 and connected by elastic ropes 3; the base bodies 1 are connected by universal ball joints, so that the posture of the base bodies 1 can be adjusted relative to each other. When the base body 1 and the flexible sleeve 2 are implanted synchronously, they can be adaptively adjusted to adapt to the shape of the heteromorphic bone. In some embodiments, such as Figure 15 As shown, both ends of the flexible sleeve 2 are provided with threaded portions 22; specifically, the flexible sleeve 2 in this embodiment is configured to have anti-torsion capability but does not affect bending, such as the transmission part of a flexible wrench, or a structure similar to a gooseneck tube; specifically, the flexible sleeve 2 is a flexible sleeve. In application, the flexible sleeve 2 is implanted into the bone and fixed by screwing on the threaded parts 22 at both ends. Then, the base 1 and other components can be installed in the flexible sleeve 2. Alternatively, the base 1 and other components can be integrated into the flexible sleeve 2 and screwed into the medullary cavity, which can improve the stability of component assembly. The flexible sleeve 2 is designed as a hollow structure. After the base 1 and other components are assembled, the opening can be sealed. In practice, a hole is made in the bone using a soft drill, and then the flexible sleeve 2 and the base 1 and other components are implanted. Specifically, while adopting structures with torsional resistance such as gooseneck tubes, it also has a certain resistance to radial deformation, which can ensure the stability and convenience of assembling various components.

[0022] Among them, the elastic rope 3 can ensure that the base 1 and the base 1 are initially supported to avoid scattering and ensure the stability of the fit; like Figure 5 and Figure 9 As shown, multiple base bodies 1 are connected in series with a pull rope 4, and two pull ropes 4 are arranged opposite each other; at least two support plates 5 are provided, and the two support plates 5 and the two pull ropes 4 are arranged in a cross shape with the cross section of the base body 1 as the reference, and the side of the support plate 5 corresponds to the center line of the base body 1. As described above, the pull rope 4 is connected to multiple bases 1. When the pull rope 4 is pulled, the multiple bases 1 will rotate and displace adaptively because they resist each other, thus adapting to the shape of the bone cavity of the heteromorphic bone. Since there are two ropes 4, the degree of freedom on both sides of the base 1 is restricted after both ropes 4 are tensioned, which strengthens the structural strength between the base 1 and the base 1. Furthermore, a support plate 5 is provided. The two support plates 5 and the two pull ropes 4 are arranged in a cross shape. Since the side of the support plate 5 corresponds to the center line of the base 1, the structural strength between the base 1 and the base 1 can be strengthened from the other two directions, thereby ensuring that the flexible bone implant is in a rigid state, thereby ensuring the fixation of the fracture site. Specifically, the support piece 5 passes through the substrate 1 to achieve a connection with the substrate 1.

[0023] like Figure 6 and Figure 7 As shown, the guide ball head 6 is connected to a base 1 located at one end of the flexible sleeve 2; the tensioning mechanism 7 and the locking mechanism 8 are located at the other end of the flexible sleeve 2; the tensioning mechanism 7 is connected to the end of the pull rope 4, and the tensioning mechanism 7 is used to pull the pull rope 4 to adjust the relative posture between multiple bases 1; the locking mechanism 8 abuts against the base 1 and is used to lock multiple bases 1. As described above, the guide ball head 6 is used to fix a base 1 and connect the end of the elastic rope 3 and the pull rope 4. In this way, when the pull rope 4 is pulled, the guide ball head 6 and the base 1 at the end move and adjust simultaneously. Specifically, the tensioning rope 4 is driven by the tensioning mechanism 7, which in turn drives all the base bodies 1 to move and adjust accordingly; After the pull rope 4 moves the base 1 into position, the locking mechanism 8 clamps the base 1, thereby making the relative positions of the base 1 more stable. In some embodiments, the flexible sleeve 2 is replaced by a rigid sleeve. In this case, the base 1 at the end is not connected to the guide ball head 6, and the pull rope 4 is not connected to the rigid sleeve, but is directly connected to the base 1 at the end, so that it can be pulled and adjusted. In this case, the diameter of the base 1 is smaller than the inner diameter of the rigid sleeve, so as to ensure that there is space for relative rotation adjustment. Specifically, the rigid sleeve adopts a bendable gooseneck tube, which has good bending performance and torsional resistance.

[0024] like Figure 6 As shown, the carrier 9 includes an inner cylinder 91, a central plate 92, and an end plate 93. The inner cylinder 91 is inserted into the interior of the flexible sleeve 2, and the tensioning mechanism 7 is disposed inside the wall of the inner cylinder 91. The central plate 92 is disposed inside the inner cylinder 91, and the locking mechanism 8 is disposed on the central plate 92. The ratio of the diameter of the central plate 92 to the wall thickness of the inner cylinder 91 is 2:1 to 3:1. The end plate 93 is disposed on the outer wall of the inner cylinder 91 and abuts against the end of the flexible sleeve 2. As described above, the carrier 9 is connected to the flexible sleeve 2 through the inner cylinder 91, and the tensioning mechanism 7 is integrated into the wall of the inner cylinder 91. The center plate 92 is set inside the inner cylinder 91 and connected to the locking mechanism 8. In this way, the tensioning mechanism 7 and the locking mechanism 8 are integrated in the same position, which facilitates subsequent overall adjustment and improves the convenience of operation. The end plate 93 is set at the end of the inner cylinder 91 and abuts against the end of the flexible sleeve 2, which helps to ensure the stability of the connection between the carrier 9 and the flexible sleeve 2. The ratio of the diameter of the central plate 92 to the wall thickness of the inner cylinder 91 is 2:1 to 3:1, which ensures that the integrated structure is compact while maintaining the overall rigidity of the carrier 9, making its application reliable. In some embodiments, the flexible sleeve 2 is configured with a flexible part and a rigid part, the rigid part being connected to the carrier 9 and fixedly connected to the nearest base 1, so that when the pull rope 4 is pulled, the force can be better distributed to ensure that the structure is adjusted in place.

[0025] like Figure 6 and Figure 13 As shown, the tensioning mechanism 7 includes a threaded post 71, a threaded cylinder 72, and a hexagonal sleeve 73, and the locking mechanism 8 includes a top block 81 and a threaded rod 82. The threaded post 71 is disposed at the end of the pull rope 4; the threaded cylinder 72 is rotatably disposed inside the wall of the inner cylinder 91, and the threaded cylinder 72 is connected to the threaded post 71 by threads; the hexagonal sleeve 73 is disposed at the end of the threaded post 71 away from the pull rope 4. As described above, when the tensioning mechanism 7 pulls the rope 4, the hexagonal sleeve 73 is connected to the hexagonal wrench, which in turn drives the threaded cylinder 72 to rotate. Under the rotation of the threaded cylinder 72, the threaded post 71 at the end of the rope 4 will move into the threaded cylinder 72, thereby tightening the rope 4, which in turn drives the base 1 to adjust its position. Specifically, the pull rope 4 is made of steel wire rope with low torsion performance so that the pull rope 4 stops following the rotation of the threaded drum 72 as soon as possible, and then turns into axial movement; The top block 81 is slidably fitted with the inner cylinder 91 and abuts against the base 1; the threaded rod 82 is connected to the center plate 92 by threaded engagement, and one end of the threaded rod 82 is connected to the top block 81. As described above, the top block 81 is used to push the base 1. When the threaded rod 82 is rotated, it will push the threaded top block 81 to move towards the base 1, making the connection of several bases 1 more stable. Then, the tensioning mechanism 7 can be used to tighten the rope 4. This structure integrates the tensioning mechanism 7 and the locking mechanism 8 in the same location, facilitating quick adjustments.

[0026] like Figure 14As shown, the substrate 1 has a stepped columnar structure and includes a first part 11 and a second part 12. One end of the first part 11 is set as a ball head. The second part 12 is connected to the other end of the first part 11, and the diameter of the second part 12 is larger than the diameter of the first part 11. A conical concave surface 101 is provided at the end of the second part 12 away from the first part 11, and a ball groove 102 is provided at the center of the conical concave surface 101. A guide groove 103 is provided on the circumferential surface of the second part 12, and the end of the guide groove 103 facing the first part 11 is set as a flared structure. As described above, the base 1 is set as a stepped structure, in which the first part 11 is a small diameter segment and the second part 12 is a large diameter segment. This makes it convenient to set the end of the first part 11 as a ball head structure, so as to cooperate with the second part 12 of the adjacent base 1. When the rope 4 is tensioned, the base 1 can swing relative to drive the flexible sleeve 2 to bend and deform, thereby adapting to the cavity of the heteromorphic bone. The second part 12 has a conical concave surface 101 and a ball groove 102. The ball groove 102 is used to cooperate with the ball head structure of the first part 11, while the conical concave surface 101 plays a role in making way, which can avoid interference problems when the adjacent base 1 swings. The second part 12 has a guide groove 103 on its circumferential surface, which facilitates the placement of the support piece 5. The end of the guide groove 103 facing the first part 11 is set as a flared structure, which helps to guide the support piece 5, thereby ensuring that the support piece 5 can continuously pass through multiple substrates 1 to ensure the reliability of the mating structure.

[0027] like Figure 5 and Figure 9 As shown, the elastic rope 3 passes through the first part 11 and the second part 12, and the pull rope 4 passes through the second part 12; As described above, the elastic rope 3 passes through the first part 11 and the second part 12, and is relatively close to the center of the base 1. This ensures the stability of the connection of the base 1 and avoids interference with the installation of the support plate 5. Among them, the pull rope 4 passes through the second part 12, so the contact area between it and the base 1 is small, which can avoid interference when the base 1 rotates relative to it, thus helping to ensure that the base 1 is adjusted in place, so that the base 1 can drive the flexible sleeve 2 to fit the irregular bone cavity.

[0028] like Figure 12 and Figure 14 As shown, a positioning groove 104 is provided on the end face of the second part 12; the tensioning block 10 is sleeved on the pull rope 4, and each end of the tensioning block 10 abuts against the second part 12 of the base 1, and one end abuts against the positioning groove 104. As described above, the positioning groove 104 on the second part 12 is used to position the tensioning block 10. When the tensioning block 10 is installed, its two ends abut against the second part 12 of the two adjacent bases 1 and are inserted into the positioning groove 104 for positioning. Specifically, the tensioning block 10 is also fitted onto the pull rope 4. This is thanks to the space left by setting the base 1 as the first part 11 and the second part 12. This structure can prevent the tensioning block from dislodging, which helps to ensure the stability of the overall structure. Since the tension block 10 is located between two adjacent bases 1, it will compress the tension block 10 after several bases 1 are pressed together, which can limit the rotation between the bases 1, thereby ensuring the radial structural strength of this flexible bone implant. Specifically, the tensioning block 10 uses a medical material with properties similar to foam, so that it can undergo a certain amount of compression deformation. When the deformation reaches its limit, the relative positioning of the matrix 1 is achieved.

[0029] like Figure 11 As shown, multiple tension blocks 10 are provided, and the tension blocks 10 are connected in series on the pull rope 4 and correspond to the first part 11; the multiple tension blocks 10 are divided into two groups, one group of tension blocks 10 is arranged from one end of the pull rope 4 toward the middle; the other group of tension blocks 10 is arranged from the other end of another pull rope 4 toward the middle; the two groups of tension blocks 10 form an overlapping area in the middle of the pull rope 4; As described above, the tensioning blocks 10 are set in two groups. Since the clavicle is S-shaped, the tensioning blocks 10 are only set on the inner side of the curved section of this flexible implant so that the tensioning blocks 10 can be compressed. The outer tensioning blocks 10 are not compressed and cannot play a structural reinforcement role, so they do not need to be set. For example, the clavicle has two curved sections in an S-shape, so tensioning blocks 10 are placed on both sides and arranged from the ends of the two pull ropes 4 toward the middle. They need to have a certain overlapping area to accommodate the fixation of the clavicle. Specifically, the arc of the clavicle acromial end is smaller, while the arc of the sternal end is larger. Therefore, on the side of the clavicle sternal end, more tension blocks 10 are arranged on the inner side of the drawstring 4, while on the side of the clavicle acromial end, fewer tension blocks 10 are arranged on the inner side of the drawstring 4, in order to adapt to the length of the arc of the clavicle. After the tensioning rope 4 is in place and locked by the locking mechanism 8, the radial and axial structural strength of the flexible bone implant can be significantly improved by the compressed tensioning block 10, making it resistant to bending and with good application stability.

[0030] like Figure 10 As shown, the flexible sleeve 2 is provided with an arc-shaped baffle 21 inside. The arc-shaped baffle 21 is made of plastic metal material. The arc-shaped baffle 21 fits the inner wall of the flexible sleeve 2 and corresponds to the guide groove 103. As described above, in order to facilitate the implantation of this flexible bone implant, the support plate 5 is not set in the early stage, but the insertion hole is reserved. After the flexible bone implant is implanted into the bone cavity, the support plate 5 is pushed in. The support plate 5 is guided by the guide groove 103 to ensure that the assembly is in place. At this time, the arc-shaped baffle 21 also plays a guiding role, which can prevent the support piece 5 from rubbing against the flexible sleeve 2 and causing the insertion to be unsmooth; In some embodiments, the support piece 5 is pre-assembled, in which case the flexible bone implant is implanted in a meandering shape without undergoing multi-degree-of-freedom deformation.

[0031] The implantation method of the flexible bone implant of the present invention includes the following steps: S1. Determine the implantation point on the end of the limb bone, connect the bone drill to the power unit, open the medullary cavity of the deformed bone, and remove bone fragments and other foreign objects after the opening is completed. S2. Connect the base 1 in series with the elastic rope 3 and the pull rope 4, then place it into the flexible sleeve 2, and connect the guide ball head 6, the tensioning mechanism 7, the locking mechanism 8 and the carrier 9. S3. By setting one end of the guide ball head 6, the whole body is inserted into the medullary cavity, and the tensioning mechanism 7 pulls the rope 4 to pre-adjust the posture of the base body 1. S4. Insert the support piece 5 into the matrix 1, and pull the rope 4 again to make the matrix 1 adjust its posture again, so that the matrix 1 is pressed against the inner wall of the medullary cavity and holds the support piece 5 tightly. S5. Adjusting the locking mechanism 8 compresses multiple bases 1, making the flexible bone implant rigid.

[0032] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A flexible bone implant, characterized in that: It includes a base (1), a flexible sleeve (2), an elastic rope (3), a tension rope (4), and a support plate (5), wherein, Multiple bases (1) are provided inside the flexible sleeve (2), and adjacent bases (1) are connected by universal ball joints; The flexible sleeve (2) may or may not have an external thread at its end; The elastic rope (3) is connected in series with multiple substrates (1) so that the multiple substrates (1) abut against each other; The pull rope (4) is connected in series with multiple base bodies (1), and two pull ropes (4) are arranged opposite each other; The support plate (5) is provided with at least two pieces. The two support plates (5) and the two pull ropes (4) are arranged in a cross shape with the cross section of the base (1) as the reference, and the side of the support plate (5) corresponds to the center line of the base (1).

2. The flexible bone implant as described in claim 1, characterized in that: It also includes a guide ball head (6), a tensioning mechanism (7), and a locking mechanism (8), among which, The guide ball head (6) is connected to a base (1) located at the end of the flexible sleeve (2); The tensioning mechanism (7) and the locking mechanism (8) are located at the other end of the flexible sleeve (2); The tensioning mechanism (7) is connected to the end of the pull rope (4), and the tensioning mechanism (7) is used to pull the pull rope (4) to adjust the relative posture between the multiple bases (1); The locking mechanism (8) abuts against the base (1), and the locking mechanism (8) is used to lock a plurality of the bases (1).

3. The flexible bone implant as described in claim 2, characterized in that: It also includes a carrier (9), which comprises an inner cylinder (91), a central plate (92), and an end plate (93), wherein, The inner cylinder (91) is inserted into the interior of the flexible sleeve (2), and the tensioning mechanism (7) is disposed inside the wall of the inner cylinder (91); The center plate (92) is disposed inside the inner cylinder (91), and the locking mechanism (8) is disposed on the center plate (92); The ratio of the diameter of the central plate (92) to the wall thickness of the inner cylinder (91) is 2:1 to 3:1; The end plate (93) is disposed on the outer wall of the inner cylinder (91) and abuts against the end of the flexible sleeve (2).

4. The flexible bone implant as described in claim 3, characterized in that: The tensioning mechanism (7) includes a threaded column (71), a threaded cylinder (72), and a hexagonal sleeve (73), and the locking mechanism (8) includes a top block (81) and a threaded rod (82), wherein, The threaded post (71) is disposed at the end of the pull rope (4); The threaded cylinder (72) is rotatably disposed inside the wall of the inner cylinder (91), and the threaded cylinder (72) is connected to the threaded column (71) by threads; The hexagonal sleeve (73) is located at the end of the threaded post (71) away from the pull rope (4); The top block (81) is slidably engaged with the inner cylinder (91) and abuts against the base (1). The threaded rod (82) is connected to the center plate (92) by a threaded connection, and one end of the threaded rod (82) is connected to the top block (81).

5. The flexible bone implant as described in any one of claims 1 to 4, characterized in that: The substrate (1) has a stepped columnar structure, and the substrate (1) includes a first part (11) and a second part (12), wherein, One end of the first part (11) is configured as a ball head; The second part (12) is connected to the other end of the first part (11), and the diameter of the second part (12) is larger than the diameter of the first part (11); The second part (12) is provided with a conical concave surface (101) at one end away from the first part (11), and a ball groove (102) is provided at the center of the conical concave surface (101). The second part (12) has a guide groove (103) on its circumferential surface, and the end of the guide groove (103) facing the first part (11) is configured as a flared structure.

6. The flexible bone implant as described in claim 5, characterized in that: The elastic cord (3) passes through the first part (11) and the second part (12), and the pull cord (4) passes through the second part (12).

7. The flexible bone implant as described in claim 6, characterized in that: It also includes a tensioning block (10), and a positioning groove (104) is provided on the end face of the second part (12). The tension block (10) is sleeved on the pull rope (4), and each end of the tension block (10) abuts against the second part (12) of the base (1), and one end abuts against the positioning groove (104).

8. The flexible bone implant as described in claim 7, characterized in that: Multiple tension blocks (10) are provided, and the tension blocks (10) are connected in series on the pull rope (4) and correspond to the first part (11). The tension blocks (10) are divided into two groups, one group of which is arranged from the end of a pull rope (4) toward the middle; Another set of tensioning blocks (10) are arranged towards the center from the other end of another pull rope (4); The two sets of tensioning blocks (10) form an overlapping area in the middle of the pull rope (4).

9. The flexible bone implant as described in claim 5, characterized in that: The flexible sleeve (2) is provided with an arc-shaped baffle (21) inside. The arc-shaped baffle (21) is made of plastic metal material. The arc-shaped baffle (21) fits the inner wall of the flexible sleeve (2) and corresponds to the guide groove (103).

10. A method for implanting the flexible bone implant as described in claim 4, characterized in that: Includes the following steps: S1. Determine the implantation point on the end of the limb bone, connect the bone drill to the power unit, open the medullary cavity of the deformed bone, and remove bone fragments and other foreign objects after the opening is completed. S2. Connect the base (1) in series with the elastic rope (3) and the pull rope (4), then place it into the flexible sleeve (2), and connect the guide ball head (6), the tensioning mechanism (7), the locking mechanism (8) and the carrier (9). S3. By setting one end of the guide ball head (6), the whole body is placed into the medullary cavity, and the tensioning mechanism (7) pulls the rope (4) to pre-adjust the posture of the base (1); S4. Insert the support piece (5) into the matrix (1) and pull the rope (4) again to make the matrix (1) adjust its posture again, so that the matrix (1) presses against the inner wall of the medullary cavity and hugs the support piece (5). S5. Adjust the locking mechanism (8) to squeeze the multiple substrates (1) so that the flexible bone implant is in a rigid state.

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