Femoral neck fracture repair system

Abstract

The invention relates to the technical field of medical instruments, in particular to a femoral neck fracture repair system which comprises a bottom base used for being connected with a femoral neck. The top base is used for being connected with the femoral head; the keel structure is used for connecting the bottom base and the top base and simultaneously establishing a keel blood double-circulation system; the supporting abutting columns are used for reinforcing the structural strength and connected with the bottom base and the top base; the wrapping structure comprises a wrapping cover face, binding belts and filling tissue, a plurality of binding connectors are formed in the two sides of the wrapping cover face, the binding belts are arranged on the binding belts in a crossed and penetrating mode so that the wrapping cover face can be bundled into a ring shape and arranged outside the keel structure and the supporting abutting columns in a sleeving mode, and the space defined by the wrapping cover face and the binding belts is filled with the filling tissue; the filling tissue comprises broken bone substances. The fracture fixing device has the effects of improving local blood circulation and promoting fracture healing while ensuring fracture fixation.

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 diseases, mainly including basal fracture type, mid-neck type, head-neck type and subcapital type. This type of fracture not only has a high incidence rate, but also has a huge impact on the patient's daily quality of life. With the advancement of medical technology, the treatment methods for femoral neck fractures are also constantly improving and developing. Early treatment methods were mainly conservative treatments, such as plaster fixation and traction, but these methods often failed to achieve ideal therapeutic effects. In recent years, with the application of minimally invasive technology and biomaterials, the treatment of femoral neck fractures has gradually tended to be 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 treatments include screw fixation and plate fixation. These methods stabilize the fracture ends and promote fracture healing by implanting metal screws or plates at the fracture site. However, for complex and severe femoral neck fractures, especially comminuted fractures, traditional fixation methods often cannot meet rehabilitation needs. 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 problem of fractures 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 solution: A femoral neck fracture repair system comprises 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 comprises 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 blood channels connected to the container-type pressurization area are provided at the cone connecting parts, 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 comprises an arc portion, and the arc portion has a support column at both ends. 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, which 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 a plurality of 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 contracted into a ring shape and is sleeved on the keel structure and the supporting column, the filling tissue is filled in the space enclosed by the wrapping cover and the binding belt, and the filling tissue includes crushed bone.

[0006] By adopting the above technical solution, using the container-type pressurized area and artificial blood vessels in the keel structure, a "keel blood double circulation" system is established, which can effectively and quickly transport blood from the blood-rich area to the fracture site, that is, the filling tissue, accelerate the regeneration of broken bone, and reduce the risk of ischemic necrosis, thereby achieving the purpose of hip preservation treatment. The design of the bottom base and the top base is connected to each other through the arc part of the supporting column and the conical fixing part of the straight part, forming a stable mechanical structure, improving 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 spillage and further enhance the fixation and regeneration ability of bone.

[0007] Optionally, the filling tissue further includes a trabecular lattice block having a disordered lattice structure, and the trabecular lattice block is formed by 3D printing of titanium alloy.

[0008] By adopting the above technical solution, the performance of the fracture repair system can be significantly improved by adding trabecular lattice blocks. The trabecular lattice blocks are made of titanium alloy 3D printing and have a disordered lattice structure. They can simulate the porous disordered characteristics of human cancellous bone, increase the porosity of bone, and promote blood penetration and bone cell growth. This structure not only enhances the mechanical stability of the fracture site, but also provides more growth space and nutrient supply for bone cells, accelerating the fracture healing process. In addition, the disordered structure of the trabecular lattice blocks increases friction, further improves the fixation effect, and reduces the risk of postoperative displacement, thereby improving the overall performance of the fracture repair system and achieving more effective bone healing and long-term stability.

[0009] Optionally, the bottom base includes a bottom bionic body, which includes a static belt, a free layer, a bone cell division and proliferation layer, a pre-calcification layer and a primary trabecular bone layer arranged in sequence, the static belt is used to introduce blood, the bone cells in the free layer are in a free state, and tantalum particles for accelerating cell proliferation are arranged at the bone cell division and proliferation layer. The tantalum particles away from the static belt converge under the action of gravity and increase friction, thereby strengthening the stress stimulation brought by the growth of bone cells and forming small bone blocks with the bone cells. Multiple small bone blocks The pre-calcified layer is connected to form bone and finally attached 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 cone connecting hole matching the cone connecting part is provided at the center of the bottom bionic body. A cone fixing hole matching the cone fixing part is provided on the surface of the static belt. A bottom fixing structure for fixing to the femoral neck and a grid array for stimulating bone growth of the femoral neck are provided on the surface of the primary trabecular layer.

[0010] By adopting the above technical solutions, the structure of the epiphyseal layer of the human body is simulated, bone ingrowth at the joint is accelerated, and long-term stability is enhanced. The static belt introduces blood, accelerates cell proliferation, forms small bone blocks and finally attaches to the primary trabecular layer. Tantalum block particles heal and regenerate the patient's free bone cells to achieve bone regeneration. The surface of the 3D printed metal trabecular layer is sprayed with hydroxyapatite osteophilic coating, which further promotes the attachment and growth of bone cells and enhances the fixation effect. The bottom surface fixation structure ensures a firm connection with the femoral neck and improves the overall stability of the system.

[0011] Optionally, the bottom surface fixing structure includes a fish-shaped cross fixing wall and a plurality of fixing piles, wherein the fixing piles are integrally arranged with the fish-shaped cross fixing wall along an extension direction of the fish-shaped cross fixing wall, and the fixing piles include a pile body and a straight-pointed cone portion, and the extension direction of the straight-pointed cone portion is perpendicular to the tangent of the fish-shaped cross fixing wall at the corresponding fixing pile.

[0012] By adopting the above technical scheme, the fish-shaped cross fixing wall is inserted into the cancellous bone to play a frame fixing role. The straight-pointed cone part realizes elastic compression during the implantation and piling process to avoid explosion. At the same time, the gap between the straight-pointed cone part and the fish-shaped cross fixing wall can also be filled with bone to enhance the fixing effect.

[0013] Optionally, a plurality of conical triangular spines are provided on the pile body, and the conical triangular spines are arranged toward the bottom bionic body.

[0014] By adopting the above technical solution, the conical triangular thorns on the pile body are easy to advance and prevent from retreating, which further enhances the fixation effect. At the same time, the small trauma caused by the conical triangular thorns during the implantation process can stimulate the proliferation of bone cells and promote bone healing.

[0015] Optionally, it also includes a tuning fork type expansion screw, which includes a stepped annular wall and a nail head arranged at one end of the stepped annular wall, the stepped annular wall is provided with two groups of tuning fork short grooves and two groups of tuning fork long grooves, the tuning fork short grooves and the tuning fork long grooves are staggered in pairs, the nail head is fixed to the femoral head, the top base includes a top stabilizing body, the center of the top stabilizing body is provided with a blood collection hole that cooperates with the cone connecting part and the cone fixing part, the top surface of the top stabilizing body is provided with a positioning pile for cooperating with the stepped annular wall, and three sharp knife-blade type fixing piles arranged in a triangle for fixing to the femoral head.

[0016] By adopting the above technical solution, the tuning fork expansion screw works together with the top base to ensure the stable fixation of the femoral head. The stepped ring wall design of the tuning fork expansion screw enables the nail head to be firmly fixed to the femoral head during implantation to prevent loosening. The staggered arrangement of the tuning fork short groove and the tuning fork long groove enhances the strength and stability of the stepped ring wall and avoids the risk of fracture of the stepped ring wall. A blood collection hole is provided at the center of the top stabilizing body of the top base, which cooperates with the cone connecting part and the cone fixing part of the keel structure to ensure smooth blood circulation. A positioning pile is provided on the top surface of the top stabilizing body, which cooperates with the stepped ring wall of the tuning fork expansion screw to further enhance the overall stability. Three sharp knife-blade fixing piles arranged in a triangle can be quickly inserted into the femoral head to form a firm fixed structure, thereby improving the patient's rehabilitation effect.

[0017] Optionally, a plurality of connecting holes are provided on the side wall of the top stabilizing body, the connecting holes are connected to the blood collecting holes, and the connecting holes are used to drain blood into the blood collecting holes.

[0018] By adopting the above technical solution, the setting of the connecting hole can effectively drain the blood at the femoral head to the blood collection hole, further promote the blood flow at the fracture site, and accelerate the fracture healing process. At the same time, the design of the connecting hole can also avoid bone necrosis caused by insufficient local blood supply, ensuring the healthy recovery of the patient's femoral head.

[0019] Optionally, the outer edge of the top surface of the top stabilizing body is provided with a flexible net for wrapping the outer side of the femoral head.

[0020] By adopting the above technical solution, the flexible mesh can wrap the outside of the femoral head 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 mesh also allows blood circulation, promotes the growth and healing of bone cells, and further improves the recovery effect.

[0021] Optionally, the support column is a nitrogen-treated cast cobalt-chromium-molybdenum alloy, and tantalum powder is sprayed on the outside of the arc-shaped portion.

[0022] By adopting the above technical solution, 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, tantalum powder is sprayed on the outside of the arc part, 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.

[0023] Optionally, a plurality of reinforcing ribs extend from the keel body.

[0024] By adopting the above technical solution, multiple reinforcing ribs extend from the outside of the keel body, which significantly enhances the overall structural strength and stability of the keel structure, preventing deformation or breakage when subjected to heavy loads, thereby ensuring the reliability and durability of the entire repair system.

[0025] In summary, the present application includes at least one of the following beneficial technical effects: 1. Establish a "keel blood double circulation" system, which improves the blood circulation of the femoral head and fracture through the container-type pressurized area and artificial blood vessels on the keel body, accelerates bone cell proliferation and new bone formation, effectively reduces the risk of avascular necrosis of the femoral head, and truly achieves hip preservation treatment; 2. Add trabecular bone blocks to the filling tissue, and use the method of pressing into blocks and mixed fixation to promote the healing and reconstruction of the patient's original bone, enhance the bone regeneration ability, and improve the speed and quality of fracture healing; 3. The bottom bionic body simulates the structure of the human epiphyseal layer, accelerates bone ingrowth at the joint, enhances the long-term stability of the system, and ensures the mechanical strength and biological properties after fracture healing. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the structure of the femoral neck fracture repair system provided in an embodiment of the present application, wherein the filling tissue is not shown.

[0027] Figure 2It is a schematic diagram of the keel structure and the double circulation of blood at the keel structure provided in an embodiment of the present application.

[0028] Figure 3 It is a schematic diagram of the structure of the strap provided in an embodiment of the present application.

[0029] Figure 4 It is a schematic structural diagram of the combination of a strap and a wrapping cover provided in an embodiment of the present application.

[0030] Figure 5 It is a schematic diagram of the structural configuration of the trabecular lattice structure provided in the embodiments of the present application.

[0031] Figure 6 It is an enlarged schematic diagram of the structural configuration of the trabecular lattice structure provided in the embodiments of the present application.

[0032] Figure 7 It is a schematic diagram of the hierarchical structure of the bottom bionic body provided in the embodiment of the present application.

[0033] Figure 8 It is a structural schematic diagram of the bottom base provided in an embodiment of the present application.

[0034] Fig. 9 It is a schematic diagram of the structure of a tuning fork expansion screw provided in an embodiment of the present application.

[0035] Fig.10 It is a schematic diagram of the structure of the top base provided in an embodiment of the present application.

[0036] Fig.11 It is a schematic diagram of the internal structure of the top base provided in an embodiment of the present application, wherein the fixing piles are not shown.

[0037] Explanation of reference numerals: 1- bottom base; 101- bottom bionic body; 1011- static belt; 1012- free layer; 1013- osteocyte division and proliferation layer; 1014- precalcification layer; 1015- primary trabecular layer; 102- fish-shaped cross fixing wall; 103- pile body; 104- straight pointed cone portion; 105- conical triangular thorn; 106- square 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 connecting part; 4041-blood channel; 405-artificial blood vessel; 406-rich blood circulation area; 407-low blood circulation area; 5-supporting 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

[0038] The following is combined with Figure 1-11 This application is described in further detail.

[0039] The embodiment of the present application discloses a femoral neck 7 fracture repair system.

[0040] 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, from which a plurality of reinforcing ribs 402 extend, 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 supporting column 5, which includes an arc portion 501, and straight portions 503 are provided at both ends of the arc portion 501. 02, a conical fixing portion 503 for connecting to the bottom base 1 or the top base 3 is provided at the end of the straight portion 502, the supporting column 5 is a nitrogen-treated cast cobalt-chromium-molybdenum alloy, and tantalum powder is sprayed on the outside of the arc portion 501; a 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, mosquito net holes 6012 are provided on the wrapping cover 601, and 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 keel structure 4 and the supporting column 5, and 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.

[0041] The "keel blood double circulation" system is established by using the container-type pressurized area 403 and the artificial blood vessel 405 in the keel structure 4. The femoral head 8 is located under the greater trochanter in the blood-rich area 406, and the lower end of the keel body 401 is connected to the blood channel 4041 at the cone connection 404, so that the blood in the blood-rich area 406 can quickly reach the container-type pressurized area 403. A part of the blood in the container-type pressurized area 403 is shunted from the upper end of the keel body 401 to the femoral head 8 (i.e., the low blood supply area 407) through the blood channel 4041 at the cone connection 404 at the upper end of the keel body 401, and the other part is shunted from the artificial blood vessel 405 to the filling tissue (i.e., the fracture reconstruction site). With the nourishment of healthy blood, the necrotic bone is reborn, and at the same time, the femoral head 8 is prevented from lesions caused by ischemia after surgery, which affects the surgical effect. The multiple reinforcing ribs 402 extending from the keel body 401 significantly enhance the overall structural strength and stability of the keel structure 4, preventing deformation or breakage when subjected to 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 connection between the arc portion 501 of the support column and the conical fixing portion 503 of the straight portion 502, constitutes 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 a nitrogen-treated cast cobalt-chromium-molybdenum alloy, which significantly enhances the strength and corrosion resistance of the support column 5, ensuring the reliability and stability during long-term use in the body. At the same time, tantalum powder is sprayed on the outside of the arc portion 501, 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. In addition, the coordination of the periphery and the wrapping structure 6 ensures the stability of the system. The wrapping cover 601, which is made of pure titanium alloy and has a thickness of 1-2 mm, has good ductility, so that it can cooperate with the binding belt 602 to wrap the filling tissue into a ball. The binding belt 602, which is made of polyethylene terephthalate (PET), has a unique double-bundle free longitudinal fiber bundle structure, which imitates the structure of autologous ligaments, provides anti-torsion and anti-stretching capabilities, has good biocompatibility, and can induce the growth of autologous tissue. In order to strengthen the locking effect, the binding belt 602 can also be provided with a binding buckle 6021. The hole design on the wrapping cover 601 is intended to prevent the overflow of bone material, further strengthening the fixation and regeneration ability of bone.

[0042] like Figure 5 and Figure 6As shown, in order to promote rapid healing of the patient's fracture site, the filling tissue may include a trabecular lattice structure. The trabecular lattice structure is constructed using titanium alloy through 3D printing technology. Its disordered lattice design can mimic the porous disordered characteristics of human cancellous bone, thereby increasing the porosity of bone tissue, promoting blood penetration and the proliferation of bone cells. This design not only strengthens the mechanical stability of the fracture site, but also provides sufficient environment and nutritional 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 enhances the fixation effect, and reduces the possibility of postoperative displacement, thereby improving the overall effectiveness of the fracture repair system and achieving more effective bone tissue repair and long-term stability.

[0043] like Figure 7 As shown, 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, a pre-calcification layer 1014 and a primary trabecular bone layer 1015 arranged in sequence. The static belt 1011 is used to introduce blood, and the bone cells in the free layer 1012 are in a free state. Tantalum block particles for accelerating cell proliferation are arranged at the bone cell division and proliferation layer. The tantalum block particles away from the static belt 1011 gather under the action of gravity and increase the friction force, thereby strengthening the stress stimulation brought by the growth of bone cells and forming small bone blocks with the bone cells. Multiple small bone blocks are connected Osteogenesis forms an early calcification layer 1014 and finally adheres to the 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. A cone connecting hole 107 matching the cone connecting part 404 is provided at the center of the bottom bionic body 101. A cone fixing hole 108 matching the cone fixing part 503 is provided on the surface of the static belt 1011. The surface of the primary trabecular layer 1015 is provided with a bottom fixing structure for fixing to the femoral neck 7, and a grid array 106 for stimulating bone growth of the femoral neck 7.

[0044] The bottom bionic body 101 provided in the present application is intended to simulate the microstructure of the growth of the epiphyseal layer of the human body to promote the rapid growth of bone tissue, thereby improving the long-term stability of the implant and the host bone. By introducing the static belt 1011, blood is able to enter, thereby promoting the proliferation of bone cells, forming small bone blocks, which are finally tightly combined with the primary trabecular layer 1015. In this process, the tantalum block particles play their healing and regeneration effects on free bone cells, achieving bone regeneration. In addition, the surface of the metal trabecular layer manufactured by 3D printing technology is coated with a hydroxyapatite coating, and the osteophilic coating further promotes the attachment and proliferation of bone cells and strengthens the fixation effect of the implant. The grid array 106 can increase the contact area and guide the bone growth stimulation of the femoral neck 7. The design of the bottom fixed structure ensures a stable connection with the femoral neck 7, thereby improving the stability of the entire system.

[0045] like Figure 8 As shown, the bottom surface fixing structure includes a fish-shaped cross fixing wall 102 and a plurality of fixing piles, 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, the fixing piles include a pile body 103 and a straight-pointed cone portion 104, 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. A plurality of conical triangular spines 105 are arranged on the pile body 103, and the conical triangular spines 105 are arranged toward the bottom bionic body 101.

[0046] The fish-shaped cross fixing wall 102 is implanted in the cancellous bone of the femoral neck 7, and its function is to construct a framework to achieve stable fixation. During the implantation process, the straight-pointed cone portion 104 can produce an elastic compression effect, effectively preventing the bone from bursting. In addition, the gap between the straight-pointed cone portion 104 and the fish-shaped cross fixing wall 102 can be used as a bone filling space, thereby enhancing the fixation stability. The conical triangular thorn 105 structure designed on the pile body 103 is not only easy to insert but also has an anti-retrogression function, further improving the fixation effect. The micro-trauma caused by the conical triangular thorn 105 during implantation can also stimulate bone cell proliferation and accelerate the bone healing process.

[0047] like Figure 1 , Figure 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 arranged at one end of the stepped annular wall 201, and 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, and 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, and the top stabilizing body 301 is provided with a blood collection hole 302 matched with the cone connecting part 404 and the cone fixing part 503 at the center, and a plurality of connecting holes 305 are provided at the side wall of the top stabilizing body 301, and the connecting holes 305 are connected with the blood collection hole 302, and the connecting holes 305 are used to drain blood into. The top surface of the top stabilizing body 301 is provided with a positioning post 303 for matching with the stepped annular wall 201, and three sharp knife-shaped fixing posts 304 arranged in a triangle for fixing with 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.

[0048] The synergy of the tuning fork type expansion screw and the top base 3 ensures the stable fixation of the femoral head 8. The step ring wall 201 design of the tuning fork type expansion screw enables the nail head 202 to be firmly fixed at 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 step ring wall 201 and reduces the risk of fracture of the step 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 part 404 and the cone fixing part 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 circulation of blood 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-blade fixing piles 304 arranged in a triangle can be quickly inserted into the femoral head 8 to form a firm fixing structure, thereby improving the patient's rehabilitation effect. The flexible net 306 can wrap the outside of the femoral head 8 to provide a stable fixing 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.

[0049] The implementation principle of a femoral neck 7 fracture repair system in an embodiment of the present application is as follows: the system accelerates bone cell proliferation and new bone formation through the established keel blood dual circulation system, effectively reduces the risk of avascular necrosis of the femoral head 8, and achieves hip preservation treatment. Secondly, trabecular bone blocks are added to the filling tissue, and the method of pressing into blocks and mixed fixation is adopted to promote the healing and reconstruction of the patient's original bone, enhance the bone regeneration ability, and improve the speed and quality of fracture healing. Finally, the bottom bionic body 101 simulates the structure of the human epiphyseal layer, accelerates bone ingrowth at the connection, enhances the long-term stability of the system, and ensures the structural strength and biological performance after fracture healing.

[0050] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A femoral neck (7) 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 parts (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 parts (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) being provided at the end of the straight portion (502); 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, the wrapping cover (601) being provided with mosquito net holes (6012), 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 belt (602) so that the wrapping cover (601) is contracted into a ring shape and is 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.

2. The femoral neck (7) fracture repair system according to claim 1, characterized in that: The filling tissue also includes a trabecular lattice block, the trabecular lattice block has a disordered lattice structure, and the trabecular lattice block is formed by 3D printing of titanium alloy.

3. The femoral neck (7) fracture repair system according to claim 1, characterized in that: The bottom base (1) comprises a bottom bionic body (101), wherein the bottom bionic body (101) comprises a stationary belt (1011), a free layer (1012), a bone cell division and proliferation layer (1013), a pre-calcified layer (1014) and a primary trabecular bone layer (1015) arranged in sequence, wherein the stationary belt (1011) is used to introduce blood, the bone cells in the free layer (1012) are in a free state, and tantalum particles for accelerating cell proliferation are arranged at the bone cell division and proliferation layer, and the tantalum particles away from the stationary belt (1011) converge under the action of gravity and increase friction, thereby strengthening the stress stimulation brought by the growth of bone cells and forming small bone blocks with the bone cells, and a plurality of small bone blocks are connected to form bone tissue. The preliminary calcification layer (1014) is 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, a cone connection hole (107) matching the cone connection part (404) is provided at the center of the bottom bionic body (101), a cone fixing hole (108) for matching the cone fixing part (503) is provided on the surface of the static belt (1011), and 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) are provided on the surface of the primary trabecular bone layer (1015).

4. The femoral neck (7) fracture repair system according to claim 3, 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 a tangent line of the fish-shaped cross fixing wall (102) at a corresponding fixing pile.

5. The femoral neck (7) fracture repair system according to claim 4, 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).

6. The femoral neck (7) fracture repair system according to claim 1, characterized in that: The invention also comprises a tuning fork expansion screw (2), the tuning fork expansion screw (2) comprising a stepped annular wall (201) and a nail head (202) arranged at one end of the stepped annular wall (201), the stepped annular wall (201) being 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) being arranged alternately in pairs, the nail head (202) being fixed to the femoral head (8), and the The top base (3) comprises a top stabilizing body (301), a blood collection hole (302) matching with the cone connecting part (404) and the cone fixing part (503) is provided at the center of the top stabilizing body (301), a positioning pile (303) for matching with the stepped annular wall (201) and three sharp knife-shaped fixing piles (304) arranged in a triangle for fixing with the femoral head (8) are provided on the top surface of the top stabilizing body (301).

7. The femoral neck (7) fracture repair system according to claim 6, characterized in that: A plurality of connecting holes (305) are provided on the side wall of the top stabilizing body (301), and the connecting holes (305) are connected to the blood collection holes (302), and the connecting holes (305) are used to drain blood into the blood collection holes.

8. The femoral neck (7) fracture repair system according to claim 6, 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).

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

10. The femoral neck (7) fracture repair system according to claim 1, characterized in that: A plurality of reinforcing ribs (402) extend out of the keel body (401).

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