Compression foldable full-suture interface screw

Abstract

Disclosed in the present application is a compression foldable full-suture interface screw, the foldable full-suture interface screw comprising a deformable fixation body, a pull bolt, and a push bolt. The deformable fixation body comprises a flexible tube and a plurality of rigid blocks fixedly arranged on the outer wall of the flexible tube, wherein the flexible tube is a textile fabric, the rigid blocks are isosceles trapezoidal columns, and the end surfaces of the rigid blocks close to the flexible tube are connecting surfaces; two adjacent rigid blocks form a folding unit, and long side surfaces of the two rigid blocks in the same folding unit face each other; when a force is applied to the folding units in the length direction of the flexible tube, the folding units drive the flexible tube to deform and move, so that the two connecting surfaces approach each other; a bolt rod of the pull bolt sequentially passes through the flexible tube and the push bolt, the push bolt can slide relative to the bolt rod of the pull bolt, and the deformable fixation body is sandwiched between a bolt head of the pull bolt and the push bolt.

Description

Extrusion folding full-suture interface nail

[0001] Cross-reference to Related Applications

[0002] This application claims priority to Chinese Patent Application CN202411320673.5, filed on September 23, 2024, entitled "Extrusion folding full-suture interface nail", the entire contents of which are incorporated herein by reference. TECHNICAL FIELD

[0003] The present application relates to the technical field of medical devices, in particular to an extrusion folding full-suture interface nail. BACKGROUND

[0004] Related technologies generally use interface screws to fix the damaged parts and bones, forming a "skeletal-implant interface" and an "implant-screw interface" between the bone, the implant and the screw, and the implant in the middle of the two interfaces is mainly fixed by the screw thread extruding the bone hole. However, from the structural point of view, the small fixed contact surface of the interface screw and the bone and the bone yield will cause the interface screw to loosen, thereby causing the overall repair fixation system to fail. In addition, the human body cannot use common mechanical parts to avoid the problem of unstable connection caused by vibration and alternating load generated by daily activities of the human body; from the material point of view, the traditional interface screw usually uses metal materials, which are not absorbable by the human body, and the large difference in stiffness between the metal and the bone easily leads to unnecessary damage to the bone. Although inorganic ceramics, high polymer materials and magnesium-based zinc alloys and other non-metallic materials have appeared to improve the problem of tissue ingrowth, the material toughness is insufficient, and the "screwed in" itself is easy to break. Even if it is successfully screwed in, long-term stress concentration will also cause the problem of fracture failure.

[0005] In summary, medical implants need to meet the requirements of mechanical strength, fixation stability and biocompatibility. In addition, it is also necessary to avoid iatrogenic damage, such as the large amount of bone loss caused by drilling due to the large diameter of the screw, the temporary damage to unrelated tissues caused by the screwing operation during surgery, and the poor tissue healing caused by non-absorbable materials.

[0006] At present, the interface nails used for fixing implants in medical devices are mostly interface screws or anchor nail products with fixed structures. The structure and composition of these products are single, and their adaptability to different human bone holes is poor, and the implantation method is mostly screwing or knocking. Therefore, the requirements for the structure of the fixing object and the operation of the surgery are very high. Although full-suture fixing object products have appeared to solve some technical problems such as small bone loss, the interface nail will not be completely deformed to the ideal state due to the restriction of the bone hole environment during actual use. The deformation and distortion of the interface nail will lead to a decrease in the strength of the fixing object, and thus cause the problem of unstable fixation. SUMMARY

[0007] One of the purposes of the present application is to provide an extrusion folding full-stitch interface nail to provide a fixed stable folding unit and a bidirectional stable extrusion folding structure to ensure long-term stable operation of a deformable fixing body.

[0008] To achieve this purpose, the first aspect of the present application adopts the following technical solution:

[0009] The extrusion folding full-stitch interface nail comprises a deformable fixing body, a pull bolt and a top bolt. The deformable fixing body comprises a flexible tube and a plurality of rigid blocks fixed on the outer wall of the flexible tube. The flexible tube is a textile fabric. The rigid blocks have an isosceles trapezoidal columnar structure. The thickness direction of the rigid blocks is the same as the radial direction of the flexible tube. The length direction of the flexible tube is perpendicular to the long side surface of the rigid blocks. The end surface of the rigid block close to the flexible tube is a connecting surface. Two adjacent rigid blocks form a folding unit. The long side surfaces of the two rigid blocks in the same folding unit face each other. When the folding unit is stressed in the length direction of the flexible tube, it drives the flexible tube to deform and move, so that the two connecting surfaces move close to each other. The pull bolt has a bolt head and a bolt rod fixed to one end of the bolt head. The bolt rod passes through the flexible tube and the top bolt in sequence. The top bolt can slide relative to the bolt rod. The length direction of the bolt rod is the same as the length direction of the deformable fixing body. The deformable fixing body is clamped between the bolt head and the top bolt.

[0010] According to the first aspect of the present application, the rigid blocks cover the outer wall of the flexible tube, and the cross section of the flexible tube is a hexagon.

[0011] According to any one of the preceding embodiments of the first aspect of the present application, the flexible tube is composed of a separation part and a bearing part. The separation part is used to separate all the bearing parts one by one. Each bearing part is provided with one rigid block. The cross section projection shape of each bearing part and the rigid block thereon is the same, and the size is set in proportion.

[0012] According to any one of the preceding embodiments of the first aspect of the present application, the separation part and the bearing part are integrally woven into shape. The separation part and one of the bearing parts are composed of a positive needle loop, and the other is composed of a negative needle loop.

[0013] According to any one of the preceding embodiments of the first aspect of the present application, the external contour of the separation part surrounding one folding unit is a regular hexagon.

[0014] According to any one of the preceding embodiments of the first aspect of the present application, the rigid block comprises a filler and a capsule skin. The capsule skin is fixed to the outer wall of the flexible tube. The capsule skin and the flexible tube surround a filling cavity. The filler is filled in the filling cavity.

[0015] According to the embodiment of any of the preceding embodiments of the first aspect of the present application, the envelope is a textile fabric, the rigid block further comprises a lock stitch line for sewing the envelope to the outer wall of the flexible tube, the lock stitch line forms equidistant sewing points along the edge of the envelope.

[0016] According to the embodiment of any of the preceding embodiments of the first aspect of the present application, the filler is fibrous, the volume of the filler is 30%-80% of the maximum volume of the filling cavity. As an optional technical solution of the extrusion and folding full-stitch interface nail, the top bolt penetrates a avoiding hole, the hole wall of the avoiding hole is in sliding fit with the outer wall of the bolt rod.

[0017] According to the embodiment of any of the preceding embodiments of the first aspect of the present application, the top bolt is a hollow pipe, the top bolt comprises a bolt pipe and a bolt ring fixed to one end of the bolt pipe, the cross section of the bolt ring covers the cross section of the bolt pipe, and the deformable fixing body is clamped between the bolt head and the bolt ring.

[0018] The beneficial effects of the present application are as follows:

[0019] The deformable fixing body of the extrusion folding full-stitch interface nail is composed of a flexible tube and a rigid block, and can deform and move in the length direction of the deformable fixing body when subjected to force, so that the two connecting surfaces in the folding unit are close to each other, thereby accurately controlling the deformation of the deformable fixing body. In combination with the grouping and limiting of the rigid block by the folding unit, the long side surfaces of the two rigid blocks are arranged on each hexagonal folding unit in opposition, and each folding unit is uniformly distributed on the flexible tube. The pull bolt and the top bolt play a role in assisting the folding deformation of the deformable fixing body, and through cooperation with the pull bolt and the top bolt, the deformable fixing body can be clamped therebetween, so that the overall structure of the extrusion folding full-stitch interface nail can provide good stability and reliability. Through the cooperation of the shaft hole of the deformable fixing body with the pull bolt and the top bolt, the deformable fixing body can be assisted to fold and deform according to the relative axial movement between the pull bolt and the top bolt. After the deformable fixing body is deformed, the pull bolt and the top bolt are removed, and the deformable fixing body is fixed in the bone tunnel. The extrusion folding full-stitch interface nail deforms the deformable fixing body through folding and deformation, so that the radial diameter of the deformable fixing body after deformation increases, and the deformable fixing body has a structure of layer-by-layer superposition in the axial direction. Moreover, the flexible tube is selected as a textile fabric, so that the deformable fixing body can be in contact with the bone tunnel through the flexible tube, thereby increasing the roughness of the surface of the deformable fixing body, increasing the friction between the extrusion folding full-stitch interface nail and the bone tunnel, and improving the use effect. Thus, the action of the deformable fixing body can be limited by the friction between the bone surface and the deformable fixing body, so that the deformable fixing body is not easy to expand after extrusion folding, thereby ensuring the long-term stable work of the deformable fixing body. The design of the deformable fixing body in contact with the bone tunnel after extrusion folding not only increases the contact area between the deformable fixing body and the bone tunnel and increases the extrusion force between the deformable fixing body and the bone surface, but also enhances the strength of the deformable fixing body, which makes the damage to the bone smaller and the self-adaptability to the bone tunnel stronger in actual surgery, and the fixing strength and stability are higher, thereby reducing the risk of surgical failure, simplifying the actual clinical operation, and providing stable postoperative repair effect. The extrusion folding full-stitch interface nail has a fixed and stable folding unit and a bidirectional stable extrusion folding structure, and the deformable fixing body is designed to have a preset deformation scheme to ensure the long-term stable work of the deformable fixing body. BRIEF DESCRIPTION OF DRAWINGS

[0020] FIG. 1 is a structural schematic view of an extrusion folding full-stitch interface nail provided by an embodiment of the present application;

[0021] FIG. 2 is a front view of the extrusion folding full-stitch interface nail provided by an embodiment of the present application;

[0022] FIG. 3 is a sectional view of the extrusion folding full-stitch interface nail provided by an embodiment of the present application;

[0023] Fig. 4 is a structural schematic diagram of the deformable fixing body provided in the embodiments of the present application;

[0024] Fig. 5 is a front view of the deformable fixing body provided in the embodiments of the present application;

[0025] Fig. 6 is a cross-sectional view of the deformable fixing body provided in the embodiments of the present application;

[0026] Fig. 7 is a sectional view of the deformable fixing body provided in the embodiments of the present application;

[0027] Fig. 8 is a partial enlarged view of A in Fig. 7;

[0028] Fig. 9 is a structural schematic diagram of the deformable fixing body after deformation provided in the embodiments of the present application;

[0029] Fig. 10 is a sectional view of the deformable fixing body after deformation provided in the embodiments of the present application;

[0030] Fig. 11 is a structural schematic diagram of the rigid block provided in the embodiments of the present application;

[0031] Fig. 12 is a sectional view of the rigid block and the partially flexible tube provided in the embodiments of the present application;

[0032] Fig. 13 is a structural schematic diagram of the jackscrew provided in the embodiments of the present application;

[0033] Fig. 14 is a sectional view of the jackscrew provided in the embodiments of the present application;

[0034] Fig. 15 is a structural schematic diagram of the pull screw provided in the embodiments of the present application;

[0035] Fig. 16 is a sectional view of the pull screw provided in the embodiments of the present application;

[0036] Fig. 17 is a structural schematic diagram of the pull screw and the jackscrew provided in the embodiments of the present application;

[0037] Fig. 18 is a sectional view of the pull screw and the jackscrew provided in the embodiments of the present application;

[0038] Fig. 19 is a front view of the folding unit provided in the embodiments of the present application;

[0039] Fig. 20 is a sectional view of the folding unit provided in the embodiments of the present application;

[0040] Fig. 21 is a sectional view I of the folding unit in the folding process provided in the embodiments of the present application;

[0041] Fig. 22 is a sectional view II of the folding unit in the folding process provided in the embodiments of the present application;

[0042] Fig. 23 is a sectional view of the folding unit after folding provided in the embodiments of the present application;

[0043] Fig. 24 is a partial expanded view of the deformable fixing body according to an embodiment of the present application;

[0044] Fig. 25 is a cross-sectional view of a method of implanting the extrusion and folding full-suture interface nail according to an embodiment of the present application;

[0045] Fig. 26 is a cross-sectional view of a method of implanting the extrusion and folding full-suture interface nail according to an embodiment of the present application;

[0046] Fig. 27 is a cross-sectional view of a method of implanting the extrusion and folding full-suture interface nail according to an embodiment of the present application;

[0047] Fig. 28 is a cross-sectional view of a method of implanting the extrusion and folding full-suture interface nail according to an embodiment of the present application;

[0048] Fig. 29 is a cross-sectional view of a method of implanting the extrusion and folding full-suture interface nail according to an embodiment of the present application.

[0049] In the drawings: 100, pull bolt; 110, bolt rod; 120, bolt head; 121, conical frustum; 200, top bolt; 210, bolt tube; 220, bolt ring; 300, deformable fixing body; 310, flexible tube; 311, bearing part; 312, partition part; 320, rigid block; 321, filler; 322, capsule skin; 323, overlock thread. DETAILED DESCRIPTION

[0050] The technical solutions of the present application will be described clearly and completely below with reference to the drawings. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0051] In the description of the application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the application. In addition, the terms "first", "second", are only for the purpose of description, and cannot be understood as indicating or implying relative importance. Among them, the terms "first position" and "second position" are two different positions, and moreover, the "above", "above" and "above" of the first feature on the second feature include the first feature above and obliquely above the second feature, or only indicate that the first feature is higher than the second feature in horizontal height. The "below", "below" and "below" of the first feature on the second feature include the first feature below and obliquely below the second feature, or only indicate that the first feature is less than the second feature in horizontal height.

[0052] In the description of the application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the application can be understood according to the specific circumstances.

[0053] The embodiments of the application are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary, only for explaining the application, and cannot be understood as a limitation on the application.

[0054] As shown in FIGS. 1-24, the present embodiment provides a full-suture interface nail of extrusion folding type, which comprises a deformable fixed body 300, a pull bolt 100 and a top bolt 200. The deformable fixed body 300 comprises a flexible tube 310 and a plurality of rigid blocks 320 fixed on the outer wall of the flexible tube 310. The flexible tube 310 is a textile fabric. The rigid blocks 320 have an isosceles trapezoidal columnar structure. The thickness direction of the rigid blocks 320 is the same as the radial direction of the flexible tube 310. The length direction of the flexible tube 310 is perpendicular to the long side surface of the rigid blocks 320. The end surface of the rigid blocks 320 close to the flexible tube 310 is a connecting surface. Two adjacent rigid blocks 320 form a folding unit. The long side surfaces of the two rigid blocks 320 in the same folding unit face each other. When the folding unit is stressed in the length direction of the flexible tube 310, the flexible tube 310 is deformed and moved, so that the two connecting surfaces are close to each other. The pull bolt 100 has a bolt head 120 and a bolt rod 110 fixed on one end of the bolt head 120. The bolt rod 110 passes through the flexible tube 310 and the top bolt 200 in sequence. The top bolt 200 can slide relative to the bolt rod 110. The length direction of the bolt rod 110 is the same as the length direction of the deformable fixed body 300. The deformable fixed body 300 is clamped between the bolt head 120 and the top bolt 200.

[0055] The deformable fixing body 300 of the extrusion folding full suture interface nail is composed of a flexible tube 310 and a rigid block 320, and can deform and move in the length direction of the deformable fixing body 300 when a force is applied, so that the two connecting surfaces in the folding unit are close to each other, thereby accurately controlling the deformation of the deformable fixing body 300. In combination with the grouping and limiting of the rigid block 320 by the folding unit, the long side surfaces of the two rigid blocks 320 are arranged opposite to each other on each hexagonal folding unit, and each folding unit is uniformly distributed on the flexible tube 310. The pull bolt 100 and the top bolt 200 play a role in assisting the folding deformation of the deformable fixing body 300, and through cooperation with the pull bolt 100 and the top bolt 200, the deformable fixing body 300 can be clamped therebetween, so that the overall structure of the extrusion folding full suture interface nail can provide good stability and reliability. Through the cooperation of the shaft holes of the deformable fixing body 300, the pull bolt 100 and the top bolt 200, the deformable fixing body 300 can be assisted to fold and deform according to the relative axial movement between the pull bolt 100 and the top bolt 200. After the deformable fixing body 300 is deformed, the pull bolt 100 and the top bolt 200 are removed, and the deformable fixing body 300 is fixed in the bone tunnel. The extrusion folding full suture interface nail deforms the deformable fixing body 300 through the folding deformation of the deformable fixing body 300, so that the radial diameter of the deformable fixing body 300 after deformation increases, and the deformable fixing body 300 has a structure of layer-by-layer superposition in the axial direction. Moreover, the flexible tube 310 is selected as a textile fabric, so that the deformable fixing body 300 can be in contact with the bone tunnel through the flexible material, thereby increasing the roughness of the surface of the deformable fixing body 300, increasing the friction between the extrusion folding full suture interface nail and the bone tunnel, and improving the use effect. Thus, the action of the deformable fixing body 300 can be limited by the friction between the bone surface and the deformable fixing body 300, so that the deformable fixing body 300 is not easy to expand after extrusion folding, thereby ensuring the long-term stable work of the deformable fixing body 300. The design of the deformable fixing body 300 in contact with the bone tunnel after extrusion folding not only increases the contact area between the deformable fixing body 300 and the bone tunnel and increases the extrusion force between the deformable fixing body 300 and the bone surface, but also enhances the strength of the deformable fixing body 300, which makes the damage to the bone smaller and the self-adaptability to the bone tunnel stronger in actual surgery, and the fixing strength and stability are higher, thereby reducing the risk of surgical failure, simplifying the actual clinical operation, and providing stable postoperative repair effect. The extrusion folding full suture interface nail has a fixed and stable folding unit and a bidirectional stable extrusion folding structure, and the deformable fixing body 300 is designed to have a preset deformation scheme to ensure the long-term stable work of the deformable fixing body 300.

[0056] In the embodiment, the rigid blocks 320 cover the outer wall of the flexible tube 310, and the cross section of the flexible tube 310 is hexagonal. The above-mentioned limitation of the arrangement of the rigid blocks 320 enhances the stability and durability of the entire deformable fixing body 300 structure, and plans the deformation of the deformable fixing body 300, which helps to ensure that the deformable fixing body 300 deforms as expected, and improves the working effect of the extrusion folding full-stitch interface nail.

[0057] Exemplarily, the flexible tube 310 is composed of a separation part 312 and a bearing part 311, the separation part 312 is used to separate all the bearing parts 311 one by one, each bearing part 311 is provided with a rigid block 320, and the cross section projection shape of each bearing part 311 and the rigid block 320 thereon is the same, and the size is set in proportion.

[0058] Through the separation of the bearing part 311 by the separation part 312 and the arrangement of the rigid block 320 in the bearing part 311, the bending position of the flexible tube 310 can be planned by arranging a crease at the separation part 312. Thus, it is ensured that the flexible tube 310 can deform as expected, so as to ensure that the deformable fixing body 300 after deformation can form ravines and protrusions as expected. The separation part 312 limits the folding position of each folding unit, ensuring that the folding unit can complete the action of approaching the two connecting surfaces as required. The above-mentioned design makes the extrusion folding full-stitch interface nail have better adaptability and flexibility, which helps to optimize the structure layout of the deformable fixing body 300, and then customize the setting according to the actual needs.

[0059] Further, the separation part 312 and the bearing part 311 are integrally woven and formed, and one of the separation part 312 and the bearing part 311 is composed of a positive needle loop, and the other is composed of a negative needle loop.

[0060] The design of the different use of the positive needle loop and the negative needle loop enhances the stability and durability of the deformable fixing body 300, and helps to ensure the full-stitch design of the extrusion folding full-stitch interface nail.

[0061] Specifically, the flexible tube 310 is a knitted weft-knitted fabric structure, and the flexible tube 310 forms a cyclic hexagonal structure by the combination of the knitted weft-knitted positive needle and negative needle. In the embodiment, the separation part 312 is a positive needle, and the bearing part 311 is a negative needle. Each hexagonal weft-knitted structure forms a folding unit.

[0062] In this embodiment, the folding units are distributed on the surface of the flexible tube 310, thereby forming two regions: a rigid body region with high rigidity and a hinge region with low rigidity. Specifically, the hinge region is provided at the partition portion 312, and the rigid body region is provided at the bearing portion 311. When the deformable anchor 300 is subjected to centripetal compression in the up-down direction by the tension bolt 100 and the top bolt 200, the rigid body region does not participate in deformation due to its high rigidity, and the hinge region starts to yield and deform, in which the outer convex folds guide the deformation outward, and the inner concave folds guide the deformation inward. The originally longitudinally arranged rigid body region starts to rotate and becomes transversely arranged, and is stacked together, so that the deformable anchor 300 as a whole is folded, and the overall shape is deformed from a longitudinally elongated cylindrical shape to a transversely expanded short cylindrical shape, thereby enabling the extrusion and folding full-suture interface nail to be in close contact with the bone surface.

[0063] The extrusion and folding full-suture interface nail provided in this embodiment not only adopts a full-flexible anchor, but also can form a desired folding deformation. Due to the existence of the deformation scheme, the deformable anchor 300 after being implanted into the bone tunnel undergoes regular morphological changes. This deformation mode, on the one hand, enables the deformable anchor 300 to expand in the radial direction of the bone tunnel to a larger diameter than that of a general flexible deformation, increases the contact area with the bone tunnel, and increases the fixation strength; on the other hand, compared with a general disordered deformation of a flexible material, the structure of the deformable anchor 300 folded layer by layer in the axial direction of the bone tunnel can increase the strength of the deformable anchor 300 itself and improve the stability. In addition, the extrusion and folding full-suture interface nail does not adopt a rotation implantation mode, which makes the extrusion and folding full-suture interface nail not prone to fixation instability caused by thread backout when subjected to alternating loads, as in the case of a rotation implantation anchor. On the contrary, due to the existence of multiple groups of grooves and protrusions on the outer surface of the folding structure, combined with the use of a suture-like rough surface by the deformable anchor 300, the friction between the extrusion and folding full-suture interface nail and the bone tunnel is increased, and the adaptability to alternating loads formed by actual walking movements is better, and the stability is higher. Therefore, the above content ensures that the extrusion and folding full-suture interface nail becomes a bidirectional stable extrusion and folding structure.

[0064] In this embodiment, the outer contour of the partition portion 312 surrounding a folding unit is a regular hexagon. The above design plans the structural layout of the folding units on the flexible tube 310, ensures the full use of the surface of the flexible tube 310, reduces the space occupied by the flexible tube 310, and optimizes the stress condition of the deformable anchor 300, which helps to ensure that the deformable anchor 300 deforms as expected. The above design makes the structure of the folding unit more reasonable and stable, and improves the reliability and service life of the entire deformable anchor 300.

[0065] Exemplarily, the rigid block 320 comprises a filler 321 and a capsule skin 322, the capsule skin 322 is fixed to the outer wall of the flexible tube 310, the capsule skin 322 and the flexible tube 310 enclose a filling cavity, and the filler 321 is filled in the filling cavity. The arrangement of the filler 321 enables the rigid block 320 to have better supporting and fixing effects, thereby adapting to different interface requirements. The arrangement of the capsule skin 322 reduces the risk of damage of the rigid block 320, reduces the risk of leakage of the filler 321, and prolongs the service life of the rigid block 320. The cooperation of the filler 321 and the capsule skin 322 not only reduces the space occupied by the rigid block 320, but also reduces the production cost of the rigid block 320, thereby ensuring that the rigid block 320 can be smoothly formed and ensuring the stable work of the rigid block 320.

[0066] Each folding unit of the extrusion folding full-suture interface nail is composed of two adjacent rigid blocks 320 connected on the flexible tube 310, and the filler 321 is made of flexible material and can be adaptively adjusted according to the actual bone tunnel shape, so that the connection strength and stability of the folding unit are ensured. The above ensures that the extrusion folding full-suture interface nail can be a fixed and stable folding unit structure.

[0067] Specifically, the capsule skin 322 is a knitted weft fabric, which can be directly knitted into an isosceles trapezoid or can be cut from a fabric.

[0068] Further, the capsule skin 322 is a textile fabric, and the rigid block 320 further comprises a lock line 323 for sewing the capsule skin 322 to the outer wall of the flexible tube 310, and the lock line 323 forms equally spaced sewing points along the edge of the capsule skin 322.

[0069] The limitation that the capsule skin 322 is a textile fabric improves the deformation ability and toughness of the surface of the rigid block 320, avoiding the case that the rigid block 320 hinders the smooth deformation; the arrangement of the lock line 323 sewing the capsule skin 322 and the flexible tube 310 can more stably fix the rigid block 320 to the outer wall of the flexible tube 310, and the above design enhances the stability and durability of the structure, and improves the fixing effect of the rigid block 320.

[0070] In the embodiment, the filler 321 is fibrous, and the volume of the filler 321 is 30%-80% of the maximum volume of the filling cavity.

[0071] This arrangement enables the filler 321 to fully play its supporting and fixing role, while avoiding occupying too much space, so as to maintain the appropriate hardness and elasticity of the rigid block 320, meet different use requirements, and ensure the compactness and rationality of the structure of the rigid block 320.

[0072] Further, the filler 321 can be any medical fiber material. Specifically, the filler 321 is PET flocculent fiber.

[0073] Exemplarily, the top bolt 200 is provided with an avoiding hole, and the hole wall of the avoiding hole is in sliding fit with the outer wall of the bolt rod 110.

[0074] The structure cooperation of the avoiding hole and the bolt rod 110 makes the movement of the bolt rod 110 in the top bolt 200 more smooth, reduces the friction resistance, improves the flexibility and reliability of the whole structure, and helps to improve the operation reliability of the extrusion of the deformable fixing body 300.

[0075] In the embodiment, the top bolt 200 is a hollow pipe, which includes a bolt pipe 210 and a bolt ring 220 fixed to one end of the bolt pipe 210, and the cross section of the bolt ring 220 covers the cross section of the bolt pipe 210, and the deformable fixing body 300 is clamped between the bolt head 120 and the bolt ring 220.

[0076] The design that the cross section of the bolt ring 220 covers the cross section of the bolt pipe 210 realizes the structural optimization of the top bolt 200, helps to reduce the production cost of the top bolt 200, reduces the occupied space, and reduces the operation difficulty of the extrusion of the deformable fixing body 300.

[0077] Specifically, the end of the bolt head 120 away from the bolt rod 110 is provided with a conical frustum 121, which is coaxial with the bolt rod 110, and the diameter of the conical frustum 121 gradually decreases away from the bolt rod 110.

[0078] In the embodiment, the deformable fixing body 300 is coaxially arranged with the bolt rod 110, and the bolt rod 110 is sequentially arranged in the deformable fixing body 300 and the avoiding hole.

[0079] As shown in FIGS. 25 to 29, the embodiment further provides an extrusion and folding type full-suture interface nail implantation method, which is applied to the extrusion and folding type full-suture interface nail and includes the following steps:

[0080] The pull bolt 100 is sequentially arranged in the deformable fixing body 300 and the top bolt 200; the extrusion and folding type full-suture interface nail is placed at the affected part, the top bolt 200 is kept fixed, the pull bolt 100 is pulled to extrude the deformable fixing body 300, the deformable fixing body 300 starts to be extruded, and the pull bolt 100 is stopped after moving a predetermined length, at this time, the deformable fixing body 300 is completely deformed, the deformation length is the predetermined length, and the diameter is expanded as expected; then the pull bolt 100 is pushed out, the top bolt 200 is taken out, it is confirmed that the implantation action is completed, and the deformable fixing body 300 normally performs the function.

[0081] Obviously, the above embodiments of the present application are merely examples for clear illustration of the present application, and are not intended to limit the implementation modes of the present application. Based on the above description, other different forms of changes or variations can also be made by those skilled in the art. Here, it is not necessary and also impossible to enumerate all the implementation modes. Any modification, equivalent replacement and improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the claims of the present application.

Claims

1. An extruded folded all-suture interface staple, wherein, The application relates to a deformable fixing body (300) comprising a flexible tube (310) and a plurality of rigid blocks (320) fixed on the outer wall of the flexible tube (310), wherein the flexible tube (310) is a textile fabric, the rigid blocks (320) are isosceles trapezoidal column structures, the thickness direction of the rigid blocks (320) is the same as the radial direction of the flexible tube (310), the length direction of the flexible tube (310) is perpendicular to the long side surface of the rigid blocks (320), and the end surface of the rigid blocks (320) close to the flexible tube (310) is a connecting surface; two adjacent rigid blocks (320) form a folding unit, and the long side surfaces of the two rigid blocks (320) in the same folding unit face each other. When the folding unit is subjected to force in the length direction of the flexible tube (310), the folding unit drives the flexible tube (310) to deform and move, so that the two connecting surfaces are close to each other; a pull bolt (100) and a top bolt (200), the pull bolt (100) has a bolt head (120) and a bolt rod (110) fixed at one end of the bolt head (120), the bolt rod (110) penetrates the flexible tube (310) and the top bolt (200) in sequence, the top bolt (200) can slide relative to the bolt rod (110), the length direction of the bolt rod (110) is the same as the length direction of the deformable fixing body (300), and the deformable fixing body (300) is clamped between the bolt head (120) and the top bolt (200). The rigid blocks (320) are arranged on the outer wall of the flexible tube (310), and the cross section of the flexible tube (310) is hexagonal.

2. The extruded folded all-suture interface pin of claim 1, wherein, The flexible tube (310) is composed of a separation part (312) and a bearing part (311), the separation part (312) is used for separating all the bearing parts (311) one by one, each bearing part (311) is provided with one rigid block (320), the cross section projection shape of each bearing part (311) is the same as that of the rigid block (320) thereon, and the size is set in proportion.

3. The extruded folded all-suture interface pin of claim 1, wherein, The separation part (312) and the bearing part (311) are integrally woven, one of the separation part (312) and the bearing part (311) is composed of a positive needle loop, and the other is composed of a negative needle loop.

4. The extruded folded all-suture interface pin of claim 3, wherein, The external contour of the separation part (312) surrounding one folding unit is a regular hexagon.

5. The extruded folded all-suture interface pin of claim 3, wherein, The rigid block (320) comprises a filler (321) and a capsule skin (322), the capsule skin (322) is fixed on the outer wall of the flexible tube (310), the capsule skin (322) and the flexible tube (310) surround a filling cavity, and the filler (321) is filled in the filling cavity.

6. The extruded folded all-suture interface pin of claim 1, wherein, The capsule skin (322) is a textile fabric, the rigid block (320) further comprises a lock stitch line (323), the lock stitch line (323) is used for sewing the capsule skin (322) to the outer wall of the flexible tube (310), and the lock stitch line (323) forms equidistant sewing points along the edge of the capsule skin (322).

7. The extruded folded all-suture interface pin of claim 6, wherein, ​ 8. The extruded folded all-suture interface pin of claim 6, wherein, The filler (321) is fibrous, and the volume of the filler (321) is 30%-80% of the maximum volume of the filling cavity.

9. The extruded folded all-suture interface pin of claim 1, wherein, The top bolt (200) penetrates a clearance hole, and the hole wall of the clearance hole is in sliding fit with the outer wall of the bolt rod (110).

10. The suture-folded all-suture interface staple of any of Claims 1-9, wherein, The top bolt (200) is a hollow tubular member, and the top bolt (200) comprises a bolt pipe (210) and a bolt ring (220) fixed to one end of the bolt pipe (210), the cross section of the bolt ring (220) covers the cross section of the bolt pipe (210), and the deformable fixing body (300) is clamped between the bolt head (120) and the bolt ring (220).

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