An improved tension trabecular bone reconstruction proximal femoral intramedullary nail

Abstract

The present invention relates to an improved tension trabecular bone reconstruction type proximal femoral intramedullary nail, the improved tension trabecular bone reconstruction type proximal femoral intramedullary nail comprises a main nail body, a reconstruction device and a locking device; the proximal section of the main nail body is laterally provided with a reconstruction device through hole; the reconstruction device comprises an anchor and a titanium cable; the titanium cable is fixedly connected to the end of the anchor; the locking device comprises a locking head and a connecting part; the two ends of the locking head are conical opening structures; the front end surface of the connecting part is provided with an external thread structure, and the end is a hollow internal hexagonal structure; the center position of the connecting part is also provided with a conical hole structure matched with the end of the locking head. Its advantages are as follows: reconstructing the tension trabecular bone of the femoral neck, playing a role of elastic fixation; at the same time, it can enhance the stress of the femoral head and neck bone block against rotation and varus, and can play a good stability; and the direction of the anchor insertion can be freely adjusted according to the different femoral neck diameters of patients.

Description

Technical Field

[0001] The invention relates to the technical field of medical devices, in particular to an improved tension trabecular bone reconstruction type proximal femoral intramedullary nail. Background Art

[0002] Trabeculae are the extensions of the cortical bone in the cancellous bone, that is, the trabeculae are connected to the cortical bone, and present an irregular three-dimensional network structure in the bone marrow cavity. Trabeculae are the main supporting structure of the proximal femur. According to their distribution, they can be divided into compression trabeculae and tension trabeculae. They are the extensions of the proximal femoral cortical bone in the cancellous bone. Therefore, they play an important role in the fixation of fractures. The internal fixation systems currently used in clinical practice are mostly support reconstruction types, that is, reconstruction of compression trabeculae. However, for unstable fractures, simply restoring and reconstructing compression trabeculae cannot completely restore the stable structure of the fracture. Re-displacement occurs after functional activities, affecting fracture healing and recovery.

[0003] Chinese patent document: CN202010660922.0, application date 2020.07.10, patent name: A proximal side-by-side double-screw proximal femoral intramedullary nail. A proximal side-by-side double-screw proximal femoral intramedullary nail is disclosed, comprising an intramedullary nail main nail, a proximal head and neck screw and a distal locking nail. The intramedullary nail main nail comprises a proximal portion, a transition portion and a distal portion. Two proximal head and neck screws are provided. The proximal portion is provided with a proximal screw channel for installing the two proximal head and neck screws side by side, and the distal portion is provided with a distal screw channel that cooperates with the distal locking nail. An inner locking nail for fixing the proximal head and neck screw is also screwed at the end of the proximal portion, and an inner threaded hole that cooperates with the inner locking nail is provided on the proximal portion, and the inner threaded hole is sealed by a tail cap.

[0004] Chinese patent document: CN201911269613.4, application date 2019.12.11, patent name: An intramedullary nail system for treating proximal femoral fractures. An intramedullary nail system for treating proximal femoral fractures is disclosed, which includes a main nail, a head nail and a supporting nail. The main nail is composed of a proximal part, a transition part and a distal part. The head nail passes through the head nail hole located in the proximal part, and the supporting nail passes through the supporting nail hole located in the transition part. The end of the supporting nail abuts against the lower side of the head nail; the main nail, the head nail and the supporting nail form a triangular structure at the proximal end of the femur.

[0005] The above-mentioned patent document CN202010660922.0 has a proximal side-by-side double screw type proximal femoral intramedullary nail. By arranging double proximal head and neck screws side by side at the proximal end, it has a good anti-rotation effect, can effectively counteract the inversion trend of the femoral head and neck fracture fragment, and reduce the stress of the head and neck screws; and the patent document CN201911269613.4 has an intramedullary nail system for treating proximal femoral fractures. It has a reasonable structure and adopts the principle of proximal triangle stabilization and pressurization to reduce the symptoms of femoral neck shortening, head and neck inversion, and even cutting caused by the collapse of the fracture site due to postoperative weight bearing, and obtains a good treatment effect. However, there is currently no relevant report on an improved tension trabecular bone reconstruction type proximal femoral intramedullary nail that can enhance the stress of the head and neck bone fragment against rotation and inversion and can provide good stability.

[0006] In summary, there is an urgent need for an improved tension trabecular bone reconstruction proximal femoral intramedullary nail that can enhance the stress resistance of the head and neck bone fragment against rotation and varus and provide good stability. Summary of the invention

[0007] The purpose of the present invention is to overcome the deficiencies of the prior art and provide an improved tension trabecular bone reconstruction proximal femoral intramedullary nail that can enhance the stress of the head and neck bone block against rotation and varus and can provide good stability.

[0008] To achieve the above object, the technical solution adopted by the present invention is:

[0009] A modified tension trabecular reconstruction proximal femoral intramedullary nail, the modified tension trabecular reconstruction proximal femoral intramedullary nail comprising a main nail body, a reconstruction device and a locking device; a reconstruction device through hole is laterally provided at the proximal section of the main nail body; the reconstruction device through hole is a hollow structure, with a conical front end and an internally threaded cylindrical end; the reconstruction device comprises an anchor and a titanium cable; the titanium cable is fixedly connected to the end of the anchor; the locking device comprises a locking head and a connecting part; the locking head has conical opening structures at both ends; the front end surface of the connecting part is an external thread structure, and the end is a hollow internal hexagonal structure; a conical hole structure matching the end of the locking head is also provided inside the center of the connecting part.

[0010] As a preferred technical solution, the front end opening of the through hole of the reconstruction device is 4-4.5 mm, and the right end opening is 5-7 mm.

[0011] As a preferred technical solution, the distal end and proximal end of the main nail body are respectively provided with a proximal locking hole and a distal locking nail.

[0012] As a preferred technical solution, the reconstruction device through hole has an inclination angle of 5° with the axis of the proximal end of the main nail body in the horizontal direction, and an inclination angle of 90-95° with the axis of the proximal end of the main nail body in the vertical direction.

[0013] As a preferred technical solution, the anchor and the titanium cable are an integrated structure, the anchor has a diameter of 4-4.5 mm, and the titanium cable has a diameter of 1.5-2 mm.

[0014] As a preferred technical solution, a main screw thread and a secondary screw thread are provided on the outer side of the anchor, the main screw thread and the secondary screw thread are arranged at intervals, and the size of the main screw thread is larger than that of the secondary screw thread.

[0015] As a preferred technical solution, the locking head and the connecting part are both cylindrical hollow structures, and the front and rear ends of the locking head are four-claw open caliper structures. The inner diameter of the connecting part is "8" shaped and the outer diameter is circular.

[0016] As a preferred technical solution, the locking device is connected and fixed by the external thread structure at the front end of the connecting part and the internal thread cylindrical structure of the reconstruction device through hole provided at the proximal end of the main nail body.

[0017] As a preferred technical solution, the opening at the end of the through hole of the reconstruction device is an oblique internal thread structure, and the shape of the external thread structure at the front end of the connecting part matches the oblique internal thread structure at the end of the through hole of the reconstruction device.

[0018] The advantages of the present invention are:

[0019] 1. It changes the shortcomings of previous proximal femoral intramedullary nail fixation. It not only reconstructs the support system, but also reconstructs the tension system, increases the stability of fixation, prevents rotation between the femoral head and the head and neck tension screw, increases the effect of resisting varus stress, and reduces postoperative complications such as hip varus and screw cutting.

[0020] 2. The main screw thread and the auxiliary screw thread on the anchor can increase the contact area between the anchor and the bone, increase the stability between the anchor and the bone, increase the area of ​​bone compression around the anchor, and enhance the tensile strength.

[0021] 3. The locking head is conical in shape. When in use, it can move forward as the connecting part and the screw through hole rotate, so that the four-jaw open caliper-like structure can gradually squeeze each other toward the center and tighten, thereby clamping and fixing the titanium cable passing through the locking device.

[0022] 4. A conical hole structure is designed inside the center of the connection part to match the end of the locking head. When the connection part is rotated and fixed with the rear section of the screw through hole near the main nail body, it can simultaneously drive the locking head to move forward, so that the openings at the front and rear ends of the locking head are gradually squeezed and shrunk at the same time, and finally the titanium cable passing inside is fixed and clamped.

[0023] 5. The inner diameter of the connecting part is "8" shaped, and the outer diameter is circular. Through the "8" shaped inner diameter, two titanium cables can be easily passed through at the same time to avoid the titanium cables being entangled with each other and affecting the operation and fixation effect. At the same time, the direction of the anchor can be freely adjusted when it is inserted (the recommended direction is within the range of 5° forward and 5° backward in the lateral position, and the top of the head and neck tension screw or spiral blade is on the same horizontal plane in the anteroposterior position) to adapt to different femoral neck diameters.

[0024] 6. The end of the connection part is designed with a hollow hexagonal structure. When tightening and fixing the titanium cable, you can use a screwdriver to twist the connection part, which is convenient and labor-saving, while ensuring the tightening of the locking head and the clamping effect of the titanium cable. When tightening the screws, keep the cable with a certain tension.

[0025] 7. The opening at the end of the screw through hole is designed as an oblique internal thread structure, and the external thread structure at the front end of the connection part matches the oblique internal thread structure at the end of the screw through hole. Since the through hole is vertebral, the anchor can be universally operated (screwed in at different angles and directions) when it is driven in, and the direction of the anchor can be freely adjusted according to the different femoral neck diameters of the patient. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Attached Figure 1 The present invention is a schematic diagram of the anterior and lateral structural surface of a main nail of an improved tension trabecular bone reconstruction proximal femoral intramedullary nail.

[0027] Attached Figure 2 The present invention is a schematic diagram of the anterior medial structural surface of a main nail of an improved tension trabecular bone reconstruction proximal femoral intramedullary nail.

[0028] Attached Figure 3 The present invention is a schematic diagram of the internal structure of a tension trabecular reconstruction structure through hole of an improved tension trabecular reconstruction type proximal femoral intramedullary nail.

[0029] Attached Figure 4 It is a schematic diagram of the plane structure of the angle between the horizontal and vertical axes of the through hole of the tension trabecular reconstruction structure of the improved tension trabecular reconstruction type proximal femoral intramedullary nail of the present invention and the proximal axis of the main nail body.

[0030] Attached Figure 5 The present invention is a schematic structural diagram of a reconstruction device for an improved tension trabecular bone reconstruction type proximal femoral intramedullary nail.

[0031] Attached Figure 6 The present invention is a schematic structural diagram of a tightening device for an improved tension trabecular bone reconstruction type proximal femoral intramedullary nail.

[0032] Attached Figure 7 The present invention is a schematic structural diagram of an improved tension trabecular bone reconstruction type proximal femoral intramedullary nail tightening device after assembly.

[0033] Attached Figure 8 The present invention is a schematic diagram of the anterior-lateral structure of an improved tension trabecular bone reconstruction type proximal femoral intramedullary nail after implantation.

[0034] Attached Fig. 9 The present invention is a schematic diagram of the anterior medial surface structure of an improved tension trabecular bone reconstruction type proximal femoral intramedullary nail after implantation.

[0035] Attached Fig.10 It is a schematic diagram of the through-hole structure of another improved tension trabecular bone reconstruction type reconstruction device of the proximal femoral intramedullary nail of the present invention. DETAILED DESCRIPTION

[0036] The present invention will be further described below in conjunction with embodiments and with reference to the accompanying drawings.

[0037] The reference numerals and components involved in the drawings are as follows:

[0038] 1. Main nail body 11. Reconstruction device through hole

[0039] 12. Proximal locking hole 13. Distal locking pin

[0040] 14. Proximal locking nail 15. Distal locking nail

[0041] 2. Reconstruction device 21. Anchor

[0042] 22. Titanium cable 23. Main screw thread

[0043] 24. Secondary screw thread 3. Locking device

[0044] 31. Locking head 32. Connecting part

[0045] 33. External thread structure 34. Internal hexagon structure

[0046] Example 1

[0047] An improved tension trabecular bone reconstruction proximal femoral intramedullary nail of the present invention comprises a main nail body 1, a reconstruction device 2 and a locking device 3;

[0048] In order to make the technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings:

[0049] Please see attached Figure 1-4 , Figure 1 This is a schematic diagram of the anterior and lateral structure of a main nail of an improved tension trabecular bone reconstruction proximal femoral intramedullary nail according to the present invention. Figure 2 This is a schematic diagram of the anterior medial side structure of a main nail of an improved tension trabecular bone reconstruction proximal femoral intramedullary nail of the present invention. Figure 3 This is a schematic diagram of the internal structure of a through hole of a tension trabecular reconstruction structure of an improved tension trabecular reconstruction type proximal femoral intramedullary nail according to the present invention. Figure 4 It is a schematic diagram of the plane structure of the angle between the horizontal and vertical axes of the through hole of the tension trabecular reconstruction structure of the improved tension trabecular reconstruction type proximal femoral intramedullary nail of the present invention and the proximal axis of the main nail body.

[0050] A reconstruction device through hole 11 is transversely provided at the proximal end of the main nail body 1; the reconstruction device through hole 11 is a hollow structure, with a conical front end and an internally threaded cylindrical end; the front end opening of the reconstruction device through hole 11 is 4.5 mm, and the end opening is 5 mm; a proximal locking hole 12 and a distal locking hole 13 are also provided below the reconstruction device through hole 11 on the main nail body 1; a proximal locking nail 14 and a distal locking nail 15 are fixed in the proximal locking hole 12 and the distal locking hole 13 respectively; the reconstruction device through hole 11 is inclined at an angle of 5° with the axis of the proximal end of the main nail body 1 in the horizontal direction (see attached Figure 4 The vertical angles of the proximal end of the main nail body 1 are 90-100° (see the attached Figure 4 The angle between the axis of the proximal locking hole 12 and the axis of the proximal section of the main nail body 1 is 135°;

[0051] Please see attached Figure 5 , Figure 5 This is a schematic diagram of the reconstruction device structure of an improved tension trabecular reconstruction type proximal femoral intramedullary nail of the present invention. The reconstruction device 2 includes an anchor 21 and a titanium cable 22; the anchor 21 is a PEEK anchor and has good biocompatibility, which can replace the traditional titanium metal, and can prevent the anchor 21 from falling off, and has a certain tension when squeezed; the titanium cable 22 is fixedly connected to the end of the anchor 23; the outer side of the anchor 21 is also provided with a main screw 23 and a secondary screw 24, the main screw 23 and the secondary screw 24 are arranged at intervals, and the size of the main screw 23 is larger than the size of the secondary screw 24; the arrangement of the main screw 23 and the secondary screw 24 can increase the contact area between the anchor 21 and the bone, and increase the stability between the anchor 21 and the bone;

[0052] Please see attached Figure 6-7 , Figure 6 This is a schematic structural diagram of a tightening device for an improved tension trabecular bone reconstruction proximal femoral intramedullary nail according to the present invention. Figure 7 The present invention is a schematic diagram of the structure of the tightening device of the improved tension trabecular reconstruction type proximal femoral intramedullary nail after assembly. The locking device 3 includes a locking head 31 and a connecting part 32; the locking head 31 and the connecting part 32 are both cylindrical hollow structures; the locking head 31 has conical opening structures at both ends; the front end surface of the connecting part 32 is provided with an external thread structure 33, and the end is a hollow internal hexagonal structure 34; the inner diameter of the connecting part 32 is "8" shaped, and the outer diameter is circular; the center position of the connecting part 32 is also provided with a conical hole structure that matches the end of the locking head 31 (the conical hole structure is similar to the reconstruction device through hole 11 of the proximal section of the main nail body 1, so it is not shown in the figure); the locking device 3 is connected and fixed by the external thread structure 34 at the front end of the connecting part 32 and the internal thread cylindrical structure at the end of the cylindrical reconstruction device through hole 11 provided at the proximal section of the main nail body 1.

[0053] It should be noted that: the front opening diameter of the reconstruction device through hole 11 provided at the proximal section of the main nail body 1 is 4-4.5 mm, and the rear opening diameter is 5-7 mm; the reconstruction device through hole 11 is designed to have an angle of 5° with the axis of the proximal end of the main nail body 1 in the horizontal direction, and an angle of 90-95° with the axis of the proximal end of the main nail body 1 in the vertical direction, which meets the biomechanical performance;

[0054] The anchor 21 and the titanium cable 22 are an integrated structure, and the diameter of the anchor 21 is 4-4.5 mm; the diameter of the titanium cable 22 is 1.5-2 mm; when the anchor 21 is fixed, it passes through the reconstruction device through hole 11 on the proximal section of the main nail body 1, and the anchor 21 is implanted into the bone block by an external tool; the main screw 23 and the auxiliary screw 24 on the anchor 21 can increase the contact area between the anchor 21 and the bone, increase the stability between the anchor 21 and the bone, so that the anchor 21 will not rotate in the reconstruction device through hole 11, the structure is more stable, and the patient's discomfort is reduced;

[0055] The front and rear ends of the locking head 31 in the tightening device 3 are four-claw open caliper-like structures; the locking head 31 is conical, and when in use, it can move forward as the connecting part 32 rotates and cooperates with the through hole 11 of the reconstruction device, so that the four-claw open caliper-like structure can gradually squeeze each other toward the center and tighten, thereby clamping and fixing the titanium cable 22 passing through the locking device 3; the center position of the connecting part 32 is provided with a conical hole structure that cooperates with the end of the locking head 31, so that when the connecting part 32 is rotated and fixed with the rear section of the through hole 11 of the reconstruction device near the main nail body 1, it can simultaneously drive the locking head 31 to move forward, so that the openings at the front and rear ends of the locking head 31 are gradually squeezed and shrunk at the same time, and finally the titanium cable 22 passing through the inside is clamped and fixed. The titanium cable 22 is fixed and clamped; the inner diameter of the connecting part 32 is "8"-shaped and the outer diameter is circular. Through the inner diameter of the "8"-shaped, two titanium cables 22 can be easily passed through at the same time to avoid the titanium cables 22 being entangled with each other and affecting the operation and fixing effect. At the same time, the direction of the anchor 21 when it is driven in can be freely adjusted (the recommended direction is within the range of 5° forward and 5° backward in the lateral position, and the top of the head and neck tension screw or spiral blade is on the same horizontal plane in the anteroposterior position) to adapt to different femoral neck diameters; the end of the connecting part 32 is designed with a hollow hexagonal structure 34. When tightening and fixing the titanium cable 22, the connecting part 32 can be twisted with the help of a screwdriver, which is convenient and labor-saving while ensuring the tightening of the locking head 31 and the clamping effect of the titanium cable 22.

[0056] The improved tension trabecular reconstruction type proximal femoral intramedullary nail of the present invention is used as follows: first, the main nail body 1 is inserted from the apex of the greater trochanter of the femur to the distal medullary cavity, and the main nail body 1 is fixed through the locking hole 12 and the locking nail 13, and then two anchors 21 with titanium cables 22 are respectively passed through the reconstruction device through holes 11 on the main nail body 1, and the anchors 21 are respectively implanted into the patient's bone blocks by an external device, and then the titanium cable 22 is passed through the tightening device 3, and the tightening device 3 is rotated and implanted on the main nail body 1, and then the titanium cable 22 is tightened to minimize the distance between the bones, and then the rotating part 33 on the locking device 3 is rotated, and the rotating part 33 at this time The opening-shaped structures at the front and rear ends of the connecting part 32 and the locking head 31 are driven to contract and tighten, so as to clamp and fix the titanium cable 22. After the fixation is completed, the excess titanium cable 22 is removed from the end of the tightening device 3. After the fixation and implantation are completed, the wound is repeatedly rinsed with a large amount of physiological saline, the deep fascia and subcutaneous skin are sutured in turn, the wound is pressure-bandaged, and the operation is completed. The above operation is used to treat the injured fracture recovery, which has the characteristics of minimally invasive and no need for secondary surgery to remove it. It can effectively reduce various complications in the process of fracture recovery treatment, improve the stability of the fracture, achieve the expected ideal effect, and can freely adjust the direction of anchoring according to the different femoral diameters of the patients.

[0057] Example 2

[0058] Please see attached Fig.10 , Fig.10 This is another schematic diagram of the through-hole structure of the reconstruction device of the improved tension trabecular reconstruction type proximal femoral intramedullary nail of the present invention. This embodiment is basically the same as the first embodiment, except that the end opening of the through-hole 11 of the reconstruction device in this embodiment is an oblique internal thread structure, and the shape of the external thread structure 33 at the front end of the connecting part 32 in this embodiment (not shown in the figure) matches the oblique internal thread structure at the end of the through-hole 11 of the reconstruction device; the through-hole 11 of the reconstruction device is designed as an oblique internal thread structure, and because the through-hole is vertebral, the anchor 21 can be universally operated (screwed in at different angles) when it is driven in, and the driving direction of the anchor 21 can be freely adjusted according to the different femoral neck diameters of the patients.

[0059] The improved tension trabecular bone reconstruction proximal femoral intramedullary nail of the present invention changes the shortcomings of the previous proximal femoral intramedullary nail fixation, not only rebuilds the support system, but also rebuilds the tension system, increases the stability of fixation, can prevent the femoral head and the head and neck tension screw from rotating, can increase the effect of resisting varus stress, and reduce complications such as postoperative hip varus and screw cutting; the reconstruction device through hole provided in the proximal section of the main nail body has an inclined angle of 5° with the axis of the proximal end of the main nail body in the horizontal direction, and an inclined angle of 95° with the axis of the proximal end of the main nail body in the vertical direction, It complies with biomechanical properties; the main screw and the auxiliary screw on the anchor can increase the contact area between the anchor and the bone, increase the stability between the anchor and the bone, so that the anchor will not rotate in the through hole of the reconstruction device, the structure is more stable, and the patient's discomfort is reduced; the locking head is conical, and when in use, it can move forward with the rotation of the connection part and the through hole of the reconstruction device, so that the four-claw open caliper-like structure can gradually squeeze each other toward the center and tighten, thereby clamping and fixing the titanium cable passing through the locking device; the design of a conical hole structure that matches the end of the locking head is provided inside the center of the connection part, so that When the connecting part is rotated and fixed with the rear section of the through hole of the proximal reconstruction device of the main nail body, it can simultaneously drive the locking head to move forward, so that the openings at the front and rear ends of the locking head are gradually squeezed and shrunk at the same time, and finally the titanium cable passing through the inside is fixed and clamped; the inner diameter of the connecting part is "8" shaped, and the outer diameter is circular. Through the inner diameter of the "8" shape, two titanium cables can be easily passed through at the same time to avoid the titanium cables being entangled with each other and affecting the operation and fixation effect. At the same time, the direction of the anchor when it is driven in can be freely adjusted (the recommended direction is within the range of 5° forward and 5° backward in the lateral position, and the top of the head and neck tension screw or spiral blade is at the same level in the anteroposterior position). The end of the connection part is designed with a hollow hexagonal structure. When tightening and fixing the titanium cable, the connection part can be twisted with the help of a screwdriver, which is convenient and labor-saving, and can ensure the tightening of the locking head and the clamping effect of the titanium cable; the end opening of the through hole of the reconstruction device is designed as an oblique internal thread structure, and the shape of the external thread structure at the front end of the connection part is matched with the oblique internal thread structure at the end of the through hole of the reconstruction device. Since the through hole is vertebral, the anchor can be universally operated (screwed in at different angles and directions) when it is driven in, and the driving direction of the anchor can be freely adjusted according to the different femoral neck diameters of the patients.

[0060] The above is only a preferred embodiment of the present invention. It should be pointed out that ordinary technicians in this technical field can make several improvements and supplements without departing from the principle of the present invention. These improvements and supplements should also be regarded as the scope of protection of the present invention.

Claims

1. An improved tension trabecular bone reconstruction proximal femoral intramedullary nail, characterized in that: The improved tension trabecular reconstruction proximal femoral intramedullary nail comprises a main nail body, a reconstruction device and a locking device; the proximal section of the main nail body is laterally provided with a reconstruction device through hole; the reconstruction device through hole is a hollow structure, the front end is conical, and the end is an internal threaded cylindrical shape; the reconstruction device comprises an anchor and a titanium cable; the titanium cable is fixedly connected to the end of the anchor; the locking device comprises a locking head and a connecting part; the two ends of the locking head are conical opening structures; the front end surface of the connecting part is an external thread structure, and the end is a hollow internal hexagonal structure; the center position of the connecting part is also provided with a conical hole structure matched with the end of the locking head The locking head and the connecting part are both cylindrical hollow structures, and the front and rear ends of the locking head are four-claw open caliper structures. The inner diameter of the connecting part is "8" shaped, and the outer diameter is circular. Through the inner diameter of the "8" shape, two titanium cables can pass through at the same time. The opening at the end of the through hole of the reconstruction device is an oblique internal thread structure, and the shape of the external thread structure at the front end of the connecting part matches the oblique internal thread structure at the end of the through hole of the reconstruction device. When the connecting part is rotated and fixed with the rear section of the through hole of the reconstruction device near the main nail body, it can simultaneously drive the locking head to move forward, so that the openings at the front and rear ends of the locking head are gradually squeezed and shrunk at the same time, and finally the titanium cable passing inside is fixed and clamped.

2. The improved tension trabecular bone reconstruction proximal femoral intramedullary nail according to claim 1, characterized in that: The front end opening of the through hole of the reconstruction device is 4-4.5 mm, and the end opening is 5-7 mm.

3. The improved tension trabecular bone reconstruction proximal femoral intramedullary nail according to claim 1, characterized in that: The distal end and proximal end of the main nail body are respectively provided with a proximal locking hole and a distal locking nail.

4. The improved tension trabecular bone reconstruction proximal femoral intramedullary nail according to claim 2, characterized in that: The reconstruction device through hole has an angle of 5° with the axis of the proximal end of the main nail body in the horizontal direction, and an angle of 90-95° with the axis of the proximal end of the main nail body in the vertical direction.

5. The improved tension trabecular bone reconstruction proximal femoral intramedullary nail according to claim 1, characterized in that: The anchor and the titanium cable are an integrated structure, the anchor has a diameter of 4-4.5 mm, and the titanium cable has a diameter of 1.5-2 mm.

6. The improved tension trabecular bone reconstruction proximal femoral intramedullary nail according to claim 1, characterized in that: A main screw thread and a secondary screw thread are arranged on the outer side of the anchor bolt, the main screw thread and the secondary screw thread are arranged at intervals, and the size of the main screw thread is larger than that of the secondary screw thread.

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