A femoral neck fracture repair system

Abstract

The application relates to the technical field of medical devices, in particular to a femoral neck fracture repair system which comprises a bottom base used for being connected with a femoral neck; a top base used for being connected with a femoral head; a keel structure used for connecting the bottom base and the top base and simultaneously establishing a 'keel blood double circulation' system; a support column used for reinforcing structural strength, the support column being connected with the bottom base and the top base; a wrapping structure which comprises a wrapping cover, a binding belt and filling tissue, two sides of the wrapping cover are provided with a plurality of binding interfaces, the binding belt is cross-woven on the binding belt so that the wrapping cover is bundled into a ring shape and is sleeved outside the keel structure and the support column, the filling tissue is filled in a space surrounded by the wrapping cover and the binding belt, and the filling tissue comprises broken bone. The application has the effects of guaranteeing fracture fixation, improving local blood circulation and promoting fracture healing.

Description

Technical Field

[0001] The present application relates to the technical field of medical devices, and in particular to a femoral neck fracture repair system. Background Art

[0002] Femoral neck and trochanteric fractures are common orthopedic conditions, including base fractures, mid-neck fractures, head-neck fractures, and subcapital fractures. These fractures not only have a high incidence rate but also significantly impact patients' daily quality of life. With advancements in medical technology, treatments for femoral neck fractures are constantly improving and developing. Early treatments primarily relied on conservative treatments, such as plaster fixation and traction, but these methods often struggle to achieve the desired therapeutic effect. In recent years, with the application of minimally invasive techniques and biomaterials, the treatment of femoral neck fractures has become increasingly precise and personalized.

[0003] In order to deal with different types and degrees of femoral neck fractures, a variety of fixation methods are usually used clinically. For mild fractures, commonly used treatment methods include screw fixation and plate fixation. These methods stabilize the fracture ends by implanting metal screws or plates at the fracture site to promote fracture healing. However, for complex and severe femoral neck fractures, especially comminuted fractures, traditional fixation methods often cannot meet the needs of rehabilitation. In this case, hemihip or total hip replacement is usually used clinically to restore the patient's walking ability and improve the quality of life. Although joint replacement solves the fracture problem to a certain extent, it also brings new problems such as joint wear, poor blood circulation and infection. Summary of the Invention

[0004] In order to improve local blood circulation and promote fracture healing while ensuring fracture fixation, the present application provides a femoral neck fracture repair system.

[0005] The femoral neck fracture repair system provided in this application adopts the following technical solutions:

[0006] A femoral neck fracture repair system includes a bottom base, the bottom base is used to connect to the femoral neck; a top base, the top base is used to connect to the femoral head; a keel structure, the keel structure includes a keel body, a container-type pressurization area is provided at the center of the keel body, and cone connecting parts for connecting to the bottom base or the top base are respectively provided at both ends of the keel, and a blood channel connected to the container-type pressurization area is provided at each cone connecting part, and a plurality of artificial blood vessels extend from the container-type pressurization area, and the artificial blood vessels are connected to the container-type pressurization area; a support column, the support column includes an arc portion, and both ends of the arc portion are provided with a cone connecting part A straight portion, the end of which is provided with a conical fixing portion for connecting to the bottom base or the top base; a wrapping structure, the wrapping structure includes a wrapping cover, a binding belt and a filling tissue, the wrapping cover is made of pure titanium alloy, mosquito net holes are provided on the wrapping cover, and multiple binding interfaces are provided on both sides of the wrapping cover, the binding belt is made of polyethylene terephthalate, the binding belt is cross-threaded in the binding belt so that the wrapping cover is tightened into a ring shape and is sleeved on the outside of the keel structure and the support column, the filling tissue is filled in the space enclosed by the wrapping cover and the binding belt, and the filling tissue includes broken bone.

[0007] By adopting the above technical solution, a "keel blood dual circulation" system is established by utilizing the container-type pressurized area and artificial blood vessels in the keel structure. This can effectively and rapidly transport blood from the blood-rich area to the fracture site, that is, the filling tissue, accelerate the regeneration of broken bone, reduce the risk of avascular necrosis, and thus achieve the purpose of hip preservation treatment. The design of the bottom base and the top base, which are connected to each other through the arc-shaped part of the support column and the tapered fixing part of the straight part, form a stable mechanical structure, improve the impact resistance and long-term stability of the entire system, and the periphery cooperates with the wrapping structure to ensure the stability of the system. The mosquito net hole design on the wrapping cover can prevent bone overflow and further enhance the fixation and regeneration capacity of bone.

[0008] Optionally, the filling tissue further includes a trabecular lattice block, the trabecular lattice block has a disordered lattice structure, and the trabecular lattice block is 3D printed from a titanium alloy.

[0009] By adopting the above technical solution, the performance of the bone fracture repair system can be significantly improved by adding the trabecular lattice block. The trabecular lattice block is made of titanium alloy 3D printing and has a disordered lattice structure, which can simulate the porous and disordered characteristics of human cancellous bone, increase the porosity of bone, promote blood penetration and bone cell growth. This structure not only enhances the mechanical stability of the fracture site, but also provides more space for bone cells to grow and nutrients to accelerate the healing process of the fracture. In addition, the disordered structure of the trabecular lattice block increases the friction, further improves the fixation effect, reduces the risk of postoperative displacement, and improves the overall performance of the bone fracture repair system, achieving more effective bone healing and long-term stability.

[0010] Optionally, the bottom base includes a bottom biomimetic body, the bottom biomimetic body includes a static band, a free layer, a bone cell division and proliferation layer, a pre-calcification layer and a primary trabecular layer arranged in sequence, the static band is used to introduce blood, the bone cells in the free layer are in a free state, the bone cell division and proliferation layer is provided with tantalum block particles for accelerating cell proliferation, the tantalum block particles away from the static band converge under the action of gravity and increase the friction, strengthen the stress stimulation brought by bone cell growth and form small bone blocks with the bone cells, a plurality of small bone blocks are connected to form bone to form the pre-calcification layer, and finally adhere to the primary trabecular layer, the primary trabecular layer is a 3D printed metal trabecular layer, the lattice surface of the primary trabecular layer is sprayed with a hydroxyapatite osteophilic coating, a conical connecting hole matched with the conical connecting part is arranged at the center of the bottom biomimetic body, a conical fixing hole matched with the conical fixing part is arranged on the surface of the static band, a bottom surface fixing structure for fixing the femoral neck and a square array for stimulating the growth of bone of the femoral neck are arranged on the surface of the primary trabecular layer.

[0011] By adopting the above technical solution, the structure of the epiphyseal layer of the human body is simulated, the connection part is accelerated to grow into bone, and the long-term stability is enhanced. The static band introduces blood, accelerates cell proliferation, forms small bone blocks and finally adheres to the primary trabecular layer, and the tantalum block particles realize bone regeneration by healing and re-creating the patient's free bone cells. The surface of the 3D printed metal trabecular layer is sprayed with a hydroxyapatite osteophilic coating, which further promotes the adhesion and growth of bone cells and enhances the fixation effect. The bottom surface fixing structure ensures firm connection with the femoral neck and improves the overall stability of the system.

[0012] Optionally, the bottom surface fixing structure includes a fish-shaped cross fixing wall and a plurality of fixing stakes, the fixing stakes are integrally arranged along the extension direction of the fish-shaped cross fixing wall, the fixing stakes include a stake body and a one-character sharp taper part, and the extension direction of the one-character sharp taper part is perpendicular to the tangent line of the fish-shaped cross fixing wall at the corresponding fixing stake.

[0013] By adopting the technical scheme, the fish-shaped cross fixed wall plug is fixed on the cancellous bone to play a frame fixing role, the one-tailed sharp taper part is elastically compressed in the implanting and piling process to avoid blasting, and the gap between the one-tailed sharp taper part and the fish-shaped cross fixed wall can be filled with bone to enhance the fixing effect.

[0014] Optionally, the pile body is provided with a plurality of conical triangular spurs, and the conical triangular spurs are arranged towards the bottom biomimetic body.

[0015] By adopting the technical scheme, the conical triangular spurs on the pile body are easy to prevent reverse movement, and the fixing effect is further enhanced. Meanwhile, the micro trauma generated by the conical triangular spurs in the implanting process can stimulate the proliferation of bone cells and promote bone healing.

[0016] Optionally, the device further comprises a tuning fork type expansion screw, the tuning fork type expansion screw comprises a stepped ring wall and a nail head arranged at one end of the stepped ring wall, two groups of tuning fork short grooves and two groups of tuning fork long grooves are arranged at the stepped ring wall, the tuning fork short grooves and the tuning fork long grooves are arranged alternately, the nail head is fixed at the femoral head, the top base comprises a top stabilizer, a blood collection hole is arranged at the center of the top stabilizer and matched with the taper connecting part and the taper fixing part, a positioning pile is arranged on the top surface of the top stabilizer and matched with the stepped ring wall, and three sharp knife blade type fixing piles arranged in a triangular shape are arranged for fixing the femoral head.

[0017] By adopting the technical scheme, the tuning fork type expansion screw cooperates with the top base to ensure the stable fixation of the femoral head. The stepped ring wall design of the tuning fork type expansion screw enables the nail head to be firmly fixed at the femoral head during the implanting process to prevent loosening. The alternating arrangement of the tuning fork short grooves and the tuning fork long grooves enhances the strength and stability of the stepped ring wall and avoids the risk of fracture of the stepped ring wall. The blood collection hole arranged at the center of the top stabilizer of the top base is matched with the taper connecting part and the taper fixing part of the keel structure to ensure smooth blood flow. The positioning pile arranged on the top surface of the top stabilizer is matched with the stepped ring wall of the tuning fork type expansion screw to further enhance the stability of the whole. The three sharp knife blade type fixing piles arranged in a triangular shape can be quickly inserted into the femoral head to form a firm fixing structure, thereby improving the rehabilitation effect of the patient.

[0018] Optionally, a plurality of communication holes are arranged at the side wall of the top stabilizer, the communication holes are communicated with the blood collection hole, and the communication holes are used for draining blood into the blood collection hole.

[0019] By adopting the technical scheme, the communication holes can effectively drain the blood at the femoral head to the blood collection hole, further promote the flow of blood at the fracture site, and accelerate the fracture healing process. Meanwhile, the design of the communication holes can also avoid bone necrosis caused by insufficient local blood supply to ensure the healthy recovery of the femoral head of the patient.

[0020] Optionally, the top stabilizer top surface outer edge is provided with a flexible net for wrapping the lateral side of the femoral head.

[0021] By adopting the above technical scheme, the flexible net can wrap the lateral side of the femoral head to provide stable fixing effect, enhance the stability of the whole system, and reduce the occurrence of postoperative complications. The small holes of the flexible net also allow blood circulation, promote the growth and healing of bone cells, and further improve the recovery effect.

[0022] Optionally, the support column is a nitrogen-treated cast cobalt-chromium-molybdenum alloy, and the arc-shaped part is sprayed with tantalum powder.

[0023] By adopting the above technical scheme, the material of the support column is a nitrogen-treated cast cobalt-chromium-molybdenum alloy, which significantly enhances the strength and corrosion resistance of the support column, ensuring the reliability and stability during long-term use in the body. At the same time, the arc-shaped part is sprayed with tantalum powder, which further enhances the cell fixation and proliferation ability, promotes bone ingrowth, and improves the overall biocompatibility and long-term stability of the repair system.

[0024] Optionally, the keel main body extends a plurality of reinforcing ribs outward.

[0025] By adopting the above technical scheme, the keel main body extends a plurality of reinforcing ribs outward, which significantly enhances the overall structural strength and stability of the keel structure, preventing deformation or fracture when bearing a large load, thereby ensuring the reliability and durability of the entire repair system.

[0026] In summary, the present application includes at least one of the following beneficial technical effects:

[0027] 1. Establish a "keel blood double circulation" system, improve the blood circulation of the femoral head and the fracture site through the container-type booster area on the keel main body and the artificial blood vessel, accelerate bone cell proliferation and new bone formation, effectively reduce the risk of femoral head avascular necrosis, and truly realize hip preservation treatment;

[0028] 2. Fill the tissue with trabecular lattice blocks, use the pressing block and mixed fixation method to promote the healing and reconstruction of the patient's original bone, enhance the bone regeneration ability, and improve the fracture healing speed and quality;

[0029] 3. The bottom biomimetic model simulates the human epiphyseal layer structure, accelerates the bone ingrowth at the connection, enhances the long-term stability of the system, and ensures the mechanical strength and biological performance after fracture healing. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1 is a structural schematic diagram of the femoral neck fracture repair system provided by the embodiment of the present application, wherein the filling tissue is not shown.

[0031] Figure 2 is a schematic diagram of the keel structure and blood double circulation of the keel structure provided by the embodiments of the present application.

[0032] Figure 3 is a structural schematic diagram of the binding belt provided by the embodiments of the present application.

[0033] Figure 4 is a structural schematic diagram of the combination of the binding belt and the wrapping cover provided by the embodiments of the present application.

[0034] Figure 5 is a structural configuration schematic diagram of the trabecular lattice structure provided by the embodiments of the present application.

[0035] Figure 6 is an enlarged structural configuration schematic diagram of the trabecular lattice structure provided by the embodiments of the present application.

[0036] Figure 7 is a hierarchical structure schematic diagram of the bottom biomimetic body provided by the embodiments of the present application.

[0037] Figure 8 is a structural schematic diagram of the bottom base provided by the embodiments of the present application.

[0038] Figure 9 is a structural schematic diagram of the tuning fork type expansion screw provided by the embodiments of the present application.

[0039] Figure 10 is a structural schematic diagram of the top base provided by the embodiments of the present application.

[0040] Figure 11 is an internal structural schematic diagram of the top base provided by the embodiments of the present application, wherein the fixing pile is not shown.

[0041] Explanation of reference numerals: 1 - bottom base; 101 - bottom bionic body; 1011 - stationary belt; 1012 - free layer; 1013 - osteocyte proliferation layer; 1014 - precalcified layer; 1015 - primary trabecular layer; 102 - fish-shaped cross fixing wall; 103 - post body; 104 - straight-pointed cone portion; 105 - conical triangular thorns; 106 - grid array; 107 - cone connecting hole; 108 - cone fixing hole; 2 - tuning fork expansion screw; 201 - stepped ring wall; 2011 - tuning fork short groove; 2012 - tuning fork long groove; 202 - nail head; 3 - top base; 301 - top stabilizing body; 302 - blood collection hole; 303-positioning pile; 304-sharp knife-shaped fixing pile; 305-connecting hole; 306-flexible net; 4-keel structure; 401-keel body; 402-reinforcement ribs; 403-cone-type pressurization area; 404-cone connection part; 4041-blood channel; 405-artificial blood vessel; 406-rich blood circulation area; 407-low blood circulation area; 5-support column; 501-arc-shaped part; 502-straight part; 503-cone fixing part; 6-wrapping structure; 601-wrapping cover; 6011-binding interface; 6012-mosquito net hole; 602-binding belt; 6021-binding belt lock; 7-femoral neck; 8-femoral head. DETAILED DESCRIPTION

[0042] The following is combined with Figure 1-11 This application is described in further detail.

[0043] The embodiment of the present application discloses a femoral neck fracture repair system.

[0044] like Figure 1-Figure 4As shown, the femoral neck 7 fracture repair system includes a bottom base 1, which is used to connect to the femoral neck 7; a top base 3, which is used to connect to the femoral head 8; a keel structure 4, which includes a keel body 401, a plurality of reinforcing ribs 402 extending from the keel body 401, a container-type pressurization area 403 is provided at the center of the keel body 401, and cone connecting parts 404 for connecting to the bottom base 1 or the top base 3 are provided at both ends of the keel, and a blood channel 4041 connected to the container-type pressurization area 403 is provided at the cone connecting part 404, and a plurality of artificial blood vessels 405 extend from the container-type pressurization area 403, and the artificial blood vessels 405 are connected to the container-type pressurization area 403; a support column 5, which includes an arc portion 501, and straight portions 503 are provided at both ends of the arc portion 501. 02. The end of the straight portion 502 is provided with a conical fixing portion 503 for connecting to the bottom base 1 or the top base 3. The support column 5 is a nitrogen-treated cast cobalt-chromium-molybdenum alloy, and the arc portion 501 is sprayed with tantalum powder; the wrapping structure 6, the wrapping structure 6 includes a wrapping cover 601, a binding belt 602 and a filling tissue. The wrapping cover 601 is a pure titanium alloy, and mosquito net holes 6012 are provided on the wrapping cover 601. A plurality of binding interfaces 6011 are provided on both sides of the wrapping cover 601. The binding belt 602 is polyethylene terephthalate. The binding belt 602 is cross-threaded in the binding belt 602 so that the wrapping cover 601 is contracted into a ring and is sleeved on the outside of the keel structure 4 and the support column 5. The filling tissue is filled in the space enclosed by the wrapping cover 601 and the binding belt 602, and the filling tissue includes broken bone.

[0045] The "skeleton blood double circulation" system is established by using the container type booster area 403 and artificial blood vessel 405 in the keel structure 4. The lower part of the femoral head 8 is in the rich blood supply area 406, and the lower end of the keel main body 401 is connected to this area through the blood passage 4041 at the taper connecting part 404, so that the blood in the rich blood supply area 406 quickly reaches the container type booster area 403. Part of the blood in the container type booster area 403 is shunted to the femoral head 8 (i.e. the low blood supply area 407) from the upper end of the keel main body 401 through the blood passage 4041 at the taper connecting part 404 located at the upper end of the keel main body 401, and the other part is shunted to the filled tissue (i.e. the bone fracture reconstruction site) from the artificial blood vessel 405. With the nourishment of healthy blood, the necrotic bone regains new life, and at the same time, the femoral head 8 is avoided from being affected by ischemia after the operation, which affects the effect of the operation. The multiple reinforcing ribs 402 extending out of the keel main body 401 significantly enhance the overall structural strength and stability of the keel structure 4, preventing deformation or fracture when bearing a large load, thereby ensuring the reliability and durability of the entire repair system. The design of the bottom base 1 and the top base 3, through the taper fixing part 503 of the arc part 501 and the straight part 502 of the support column, connects to each other, forming a stable mechanical structure, thereby improving the impact resistance and long-term stability of the entire system. The material of the support column 5 is nitrogen-treated cast cobalt-chromium-molybdenum alloy, which significantly enhances the strength and corrosion resistance of the support column 5, ensuring its reliability and stability during long-term use in the body. At the same time, the arc part 501 is sprayed with tantalum powder, further enhancing cell fixation and proliferation, promoting bone ingrowth, and improving the overall biocompatibility and long-term stability of the repair system. In addition, the cooperation of the outer periphery and the wrapping structure 6 ensures the stability of the system. The wrapping cover 601 made of pure titanium alloy with a thickness of 1-2 mm has good ductility, so that it can cooperate with the binding belt 602 to wrap the filled tissue into a group. The binding belt 602 made of polyethylene terephthalate (PET) has a unique double-beam free longitudinal fiber bundle structure, which simulates the structure of the autogenous ligament, providing anti-twisting and anti-stretching ability, and has good biocompatibility, which can induce the ingrowth of autogenous tissue. In order to enhance the locking effect, the binding belt 602 can also be provided with a belt lock 6021. The hole design on the wrapping cover 601 is designed to prevent the overflow of bone material, further enhancing the fixation and regeneration ability of the bone.

[0046] As Figure 5 And Figure 6As shown, to promote the rapid healing of the fracture site of the patient, the filling tissue can include a trabecular lattice structure. The trabecular lattice structure is constructed by 3D printing technology with titanium alloy, and its disordered lattice design can mimic the porous and disordered characteristics of human cancellous bone, thereby improving the porosity of bone tissue, promoting the penetration of blood and the proliferation of bone cells. This design not only strengthens the mechanical stability of the fracture site, but also provides sufficient environment and nutrient support for the growth of bone cells, accelerating the process of fracture healing. In addition, the disordered structure of the trabecular lattice structure increases the friction with the surrounding tissue, further enhancing the fixation effect and reducing the possibility of postoperative displacement, thereby improving the overall performance of the bone fracture repair system and achieving more effective bone tissue repair and long-term stability.

[0047] As shown in Figure 7 The bottom base 1 includes a bottom biomimetic body 101, which includes a static band 1011, a free layer 1012, a bone cell division and proliferation layer 1013, a pre-calcification layer 1014, and a primary trabecular layer 1015 arranged in sequence. The static band 1011 is used to introduce blood, the bone cells in the free layer 1012 are in a free state, the bone cell division and proliferation layer is provided with tantalum block particles for accelerating cell proliferation, the tantalum block particles away from the static band 1011 converge and increase friction under the action of gravity, strengthen the stress stimulation brought by bone cell growth and form small bone blocks with bone cells, multiple small bone blocks are connected to form a pre-calcification layer 1014, and finally attached to a primary trabecular layer 1015. The primary trabecular layer 1015 is a 3D printed metal trabecular layer, the lattice surface of the primary trabecular layer 1015 is sprayed with a hydroxyapatite osteophilic coating, the center of the bottom biomimetic body 101 is provided with a taper connecting hole 107 matched with the taper connecting part 404, the surface of the static band 1011 is provided with a taper fixing hole 108 matched with the taper fixing part 503, the surface of the primary trabecular layer 1015 is provided with a bottom surface fixing structure for fixing the femoral neck 7, and a square array 106 for stimulating the growth of bone of the femoral neck 7.

[0048] The bottom bionic body 101 is designed to simulate the microstructure of the epiphyseal layer of human bone growth to promote the rapid ingrowth of bone tissue and improve the long-term stability of the implant and the host bone. By introducing the resting zone 1011, blood can enter and promote the proliferation of bone cells, forming small bone blocks that eventually integrate with the primary trabecular layer 1015. In this process, the tantalum block particles play a healing and regenerative role for free bone cells, achieving bone regeneration. In addition, the metal trabecular layer surface manufactured by 3D printing technology is coated with a hydroxyapatite coating, which further promotes the attachment and proliferation of bone cells and enhances the fixation effect of the implant. The square array 106 can increase the contact area and guide the bone ingrowth stimulation of the femoral neck 7. The design of the bottom fixation structure ensures stable connection with the femoral neck 7, thereby improving the stability of the entire system.

[0049] As shown in Figure 8 , the bottom surface fixation structure includes a fish-shaped cross fixation wall 102 and a plurality of fixation stakes, which are integrally arranged along the extension direction of the fish-shaped cross fixation wall 102. The fixation stakes include a stake body 103 and a sharp tapered portion 104, and the extension direction of the sharp tapered portion 104 is perpendicular to the tangent line of the fish-shaped cross fixation wall 102 at the corresponding fixation stake. A plurality of conical triangular spikes 105 are arranged on the stake body 103, and the conical triangular spikes 105 are arranged towards the bottom bionic body 101.

[0050] The fish-shaped cross fixation wall 102 is implanted in the cancellous bone of the femoral neck 7, which serves to construct a framework for stable fixation. During implantation, the sharp tapered portion 104 can produce an elastic compression effect, effectively preventing bone burst phenomenon. In addition, the gap between the sharp tapered portion 104 and the fish-shaped cross fixation wall 102 can serve as a bone filling space, thereby enhancing the fixation stability. The conical triangular spike 105 structure designed on the stake body 103 not only facilitates insertion but also has a backstop function, further improving the fixation effect. The microtrauma caused by the conical triangular spike 105 during implantation can also stimulate bone cell proliferation and accelerate the healing process of bone.

[0051] As shown in Figure 1 , Figures 9-11As shown, in order to fix the top base 3 to the femoral head 8, a tuning fork expansion screw 2 can be used as an auxiliary. The tuning fork expansion screw 2 includes a stepped annular wall 201 and a nail head 202 provided at one end of the stepped annular wall 201. The stepped annular wall 201 is provided with two groups of tuning fork short grooves 2011 and two groups of tuning fork long grooves 2012. The tuning fork short grooves 2011 and the tuning fork long grooves 2012 are staggered in pairs, and the nail head 202 is fixed to the femoral head 8. The top base 3 includes a top stabilizing body 301. The center of the top stabilizing body 301 is provided with a blood collection hole 302 that cooperates with the cone connecting portion 404 and the cone fixing portion 503. The side wall of the top stabilizing body 301 is provided with multiple connecting holes 305. The connecting holes 305 are connected to the blood collection hole 302. The connecting holes 305 are used to drain blood into the blood collection hole 302. The top surface of the top stabilizing body 301 is provided with positioning posts 303 for cooperating with the stepped annular wall 201, and three sharp knife-shaped fixing posts 304 arranged in a triangle for fixing to the femoral head 8. The outer edge of the top surface of the top stabilizing body 301 is provided with a flexible net 306 for wrapping the outer side of the femoral head 8.

[0052] The synergistic effect of the tuning fork-type expansion screw and the top base 3 ensures the stable fixation of the femoral head 8. The stepped ring wall 201 design of the tuning fork-type expansion screw enables the screw head 202 to be firmly fixed to the femoral head 8 during the implantation process, effectively preventing loosening. The staggered arrangement of the tuning fork short groove 2011 and the tuning fork long groove 2012 enhances the strength and stability of the stepped ring wall 201 and reduces the risk of fracture of the stepped ring wall 201. A blood collection hole 302 is provided at the center of the top stabilizing body 301 of the top base 3, which cooperates with the cone connecting portion 404 and the cone fixing portion 503 of the keel structure 4 to ensure smooth blood circulation. The provision of the connecting hole 305 can effectively promote the drainage of blood from the femoral head 8 to the blood collection hole 302, thereby enhancing the blood circulation at the fracture site and accelerating the fracture healing process. In addition, the design of the connecting hole 305 can also prevent bone necrosis caused by insufficient local blood supply, and ensure the healthy recovery of the patient's femoral head 8. The top surface of the top stabilizing body 301 is provided with a positioning pile 303, which cooperates with the stepped ring wall 201 of the tuning fork-type expansion screw to further enhance the overall stability. Three sharp knife-edge fixing piles 304 arranged in a triangle can be quickly inserted into the femoral head 8 to form a firm fixed structure, thereby improving the patient's rehabilitation effect. The flexible net 306 can wrap around the outside of the femoral head 8 to provide a stable fixation effect, enhance the stability of the entire system, and reduce the occurrence of postoperative complications. The small hole design of the flexible net 306 also allows blood circulation, promotes the growth and healing of bone cells, and further improves the recovery effect.

[0053] The implementation principle of the femoral neck 7 fracture repair system in the embodiment of the application is as follows: the system accelerates bone cell proliferation and new bone formation through the established keel blood double circulation system, effectively reduces the risk of femoral head 8 ischemic necrosis, and realizes hip preservation treatment. Secondly, the trabecular grid crystal block is added to the filling tissue, and the mixed fixation mode is adopted to promote the healing and reconstruction of the original bone quality of the patient, enhance the bone regeneration ability, and improve the fracture healing speed and quality. Finally, the bottom bionic body 101 simulates the human epiphyseal layer structure, accelerates the bone ingrowth at the connection, enhances the long-term stability of the system, and ensures the structural strength and biological performance after the fracture healing.

[0054] The above are preferred embodiments of the application, and do not limit the protection scope of the application, so: any equivalent changes made on the basis of the structure, shape, principle of the application should be covered within the protection scope of the application.

Claims

1. A femoral neck fracture repair system, characterized in that: include: A bottom base (1), the bottom base (1) being used to be connected to the femoral neck (7); A top base (3), the top base (3) being used to be connected to the femoral head (8); A keel structure (4), the keel structure (4) comprising a keel body (401), a container-type pressurization area (403) being provided at the center of the keel body (401), cone connecting portions (404) for connecting to the bottom base (1) or the top base (3) being provided at both ends of the keel, blood channels (4041) being provided at the cone connecting portions (404) being connected to the container-type pressurization area (403), a plurality of artificial blood vessels (405) extending from the container-type pressurization area (403), and the artificial blood vessels (405) being connected to the container-type pressurization area (403); A supporting column (5), the supporting column (5) comprising an arc-shaped portion (501), straight portions (502) being provided at both ends of the arc-shaped portion (501), and a conical fixing portion (503) for connecting to the bottom base (1) or the top base (3); A wrapping structure (6), the wrapping structure (6) comprising a wrapping cover (601), a binding belt (602) and a filling tissue, the wrapping cover (601) being made of pure titanium alloy, a mosquito net hole (6012) being provided on the wrapping cover (601), a plurality of binding interfaces (6011) being provided on both sides of the wrapping cover (601), the binding belt (602) being made of polyethylene terephthalate, the binding belt (602) being cross-threaded through the binding interfaces (6011) so that the wrapping cover (601) is contracted into a ring shape and sleeved outside the keel structure (4) and the supporting column (5), the filling tissue being filled in the space enclosed by the wrapping cover (601) and the binding belt (602), the filling tissue comprising crushed bone, The filling tissue further includes a trabecular bone lattice block, wherein the trabecular bone lattice block has a disordered lattice structure and is formed by 3D printing of a titanium alloy. The bottom base (1) includes a bottom bionic body (101), and the bottom bionic body (101) includes a static belt (1011), a free layer (1012), a bone cell division and proliferation layer (1013), an early calcification layer (1014) and a primary trabecular bone layer (1015) arranged in sequence. The static belt (1011) is used to introduce blood. The bone cells in the free layer (1012) are in a free state. Tantalum block particles for accelerating cell proliferation are provided at the bone cell division and proliferation layer (1013). The tantalum block particles away from the static belt (1011) converge under the action of gravity and increase friction, thereby strengthening the stress stimulation brought by bone cell growth and forming small bone blocks with the bone cells. Multiple small bone blocks are connected to form bone matrix. The preliminary calcification layer (1014) is formed and finally attached to the primary trabecular bone layer (1015), the primary trabecular bone layer (1015) is a 3D printed metal trabecular bone layer, the lattice surface of the primary trabecular bone layer (1015) is sprayed with a hydroxyapatite osteophilic coating, the center of the bottom bionic body (101) is provided with a cone connection hole (107) that matches the cone connection part (404), the surface of the stationary belt (1011) is provided with a cone fixing hole (108) for matching the cone fixing part (503), the surface of the primary trabecular bone layer (1015) is provided with a bottom surface fixing structure for fixing to the femoral neck (7), and a grid array (106) for stimulating bone growth of the femoral neck (7).

2. The femoral neck fracture repair system according to claim 1, characterized in that: The bottom surface fixing structure comprises a fish-shaped cross fixing wall (102) and a plurality of fixing piles, wherein the fixing piles are integrally arranged with the fish-shaped cross fixing wall (102) along the extension direction of the fish-shaped cross fixing wall (102), and the fixing piles comprise a pile body (103) and a straight pointed cone portion (104), wherein the extension direction of the straight pointed cone portion (104) is perpendicular to the tangent of the fish-shaped cross fixing wall (102) at the corresponding fixing pile.

3. The femoral neck fracture repair system according to claim 2, characterized in that: The pile body (103) is provided with a plurality of conical triangular spines (105), and the conical triangular spines (105) are arranged toward the bottom bionic body (101).

4. The femoral neck fracture repair system according to claim 1, characterized in that: The invention also includes a tuning fork expansion screw (2), the tuning fork expansion screw (2) including a stepped ring wall (201) and a nail head (202) arranged at one end of the stepped ring wall (201), the stepped ring wall (201) is provided with two groups of tuning fork short grooves (2011) and two groups of tuning fork long grooves (2012), the tuning fork short grooves (2011) and the tuning fork long grooves (2012) are arranged in pairs, the nail head (202) is fixed to the femoral head (8), and the tuning fork expansion screw (202) is fixed to the femoral head (8). The top base (3) includes a top stabilizing body (301), a blood collection hole (302) that cooperates with the cone connecting portion (404) and the cone fixing portion (503) is provided at the center of the top stabilizing body (301), and a positioning pile (303) for cooperating with the stepped ring wall (201) and three sharp knife-shaped fixing piles (304) arranged in a triangle for fixing to the femoral head (8) are provided on the top surface of the top stabilizing body (301).

5. The femoral neck fracture repair system according to claim 4, characterized in that: A plurality of communication holes (305) are provided on the side wall of the top stabilizing body (301), and the communication holes (305) are connected to the blood collection hole (302). The communication holes (305) are used to drain blood into the blood collection hole (302).

6. The femoral neck fracture repair system according to claim 4, characterized in that: The outer edge of the top surface of the top stabilizing body (301) is provided with a flexible net (306) for wrapping the outer side of the femoral head (8).

7. The femoral neck fracture repair system according to claim 1, characterized in that: The supporting column (5) is a nitrogen-treated cast cobalt-chromium-molybdenum alloy, and the arc portion (501) is sprayed with tantalum powder.

8. The femoral neck fracture repair system according to claim 1, characterized in that: A plurality of reinforcing ribs (402) extend outwards of the keel body (401).

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