A femoral neck fracture fixation device

Abstract

The application discloses a femoral neck plate type internal fixation assembly, which comprises a long and narrow plate body capable of being implanted into a femoral neck, so that the two side edges of the plate body can be pressed against the inner wall of the neck of the femoral neck, the outer end of the plate body is connected with a fixing seat, the fixing seat is provided with a fixing hole, a fixing wire is sleeved in the fixing hole, and the two side edges of the plate body can be respectively provided with blade parts to form plate blades, so that the plate blades can be cut into the inner wall of the neck of the femoral neck after the plate body is implanted into the femoral neck. The application can be quickly assembled and reaches the purpose of fixing the femoral neck. According to different fracture positions, corresponding fixing plates can be selected. The fixing plate can be clamped in the narrow area of the neck, the positions of the distal end and the proximal end of the fracture can be kept corresponding, and the distal end and the proximal end of the fracture cannot swing and twist.

Description

Technical Field

[0001] This invention belongs to the technical field of femoral neck fracture reduction and fixation devices, specifically relating to a femoral neck fracture fixation device. Background Technology

[0002] The fixation of the femoral neck mainly involves fixing and restraining the distal and proximal ends of the fracture to prevent relative swinging and rotation. Once the distal and proximal ends are joined, they provide support. Because the muscles and ligaments themselves have a traction effect, this support and traction force can maintain relative stability. Therefore, the key to fixing the distal and proximal ends of the fracture is to prevent relative swinging and rotation.

[0003] Femoral neck and trochanteric fractures are common in the elderly. When fixing femoral neck or intertrochanteric fractures with screws and plates, traditional internal fixation methods for femoral neck fractures are numerous, but due to the difficulty of operation and the high incidence of complications, joint replacement is often required as a final step. The femoral neck has a unique anatomical structure, with neck-shaft angles and anteversion angles on different planes, and its deep and concealed location makes accurate placement of the guide pin challenging. In clinical internal fixation treatment of femoral neck and trochanteric fractures, guide pin placement is always necessary for initial positioning. Guide pin placement is usually based on the surgeon's clinical experience, and the main problem with traditional fixation methods is the issue of insecure fixation.

[0004] On the other hand, the femoral neck consists of an outer layer of hard bone and an inner layer of loose bone, such as Figure 15 As shown, the loose bone portion fills the entire bone cavity. The inner layer of loose bone is large in volume and low in density. While the intramedullary nail has sufficient fixation strength when fixed to the outer layer of hard bone, its fixation strength is insufficient when fixed to the inner layer of loose bone. In fact, a large portion of the intramedullary nail is located within the inner layer of loose bone. The outer diameter of the root and distal end of the femoral neck is larger than that of the neck itself, resulting in some intramedullary nails protruding outside the neck. This leads to poor stability of the intramedullary nail fixation.

[0005] Existing technologies employ structures similar to expandable wires, which support the inner wall of the femoral neck cavity by expanding the expansion portion. In reality, this supports the loose bone portion and compresses it to the hard bone inner wall. This type of expandable bone compressive device has the following problems: (1) The expansion surface is curved, which cannot completely peel off the loose bone portion to directly contact the hard bone inner wall, resulting in insufficient firmness after compression; (2) After expansion and compression, it cannot provide sufficient restraint force to the femoral neck in the circumferential direction, and the femoral neck may rotate. Dislocation occurs, (3) it is highly destructive to the loose bone portion. When its inner end expands, it destroys all the loose bone portion in the femoral neck cavity. (4) Its inner end expansion portion cannot be completely matched with the inner wall of the femoral neck cavity and cannot provide sufficient anti-torsion force. The reduction of the femoral neck fracture often requires maintaining the lower limb in internal rotation position. This point is buried by the acetabulum and is not a complete sphere. The rotation of the body position will bring a large torque to the internal support component, resulting in the inner end expansion portion and the inner wall of the femoral neck being in point contact, thus resulting in poor internal pressure stability. For example, the "expansion fixation femoral head internal support body" provided by CN 202146350 U includes a support body and an internal expansion screw. The support body is sleeved outside the internal expansion screw. The top of the support body is arc-shaped. The support body is provided with radial expansion wings. The expansion wings are composed of several wing pieces. An expansion gap is formed between each wing piece. The internal expansion screw is provided with an expansion section. After the internal expansion screw is inserted into the support body, the expansion section can open the expansion wing. The support body and the internal expansion screw are threadedly connected. The patent document has the above problems (1)-(4). The "Adjustable Pressure Fixation Expansion Bolt for Femoral Neck Fracture" with publication number CN2299593Y has the above problems (1)-(4). The "Femoral Neck Expansion Locking Pressure Screw" with publication number CN2487349Y and the "Expansion Pressure Bone Bolt" with publication number CN2209507Y have the above problems (2) and (4). Summary of the Invention

[0006] To address the problems of existing femoral neck fixation methods requiring at least three fixation screws in different directions, resulting in limited contact points between each screw and the bone and poor stability; and to address the issues of existing internal expansion fixation devices having numerous components, each requiring selection of appropriate components based on the patient's body shape, leading to difficult and time-consuming installation during surgery, this invention provides a femoral neck plate-type internal fixation component that can be quickly assembled to achieve femoral neck fixation.

[0007] The solution to the technical problem of this invention is to use a femoral neck plate-type internal fixation component, including a long and narrow plate that can be fitted into the femoral neck, so that the two sides of the plate can press against the inner wall of the neck of the femoral neck. The outer end of the plate is connected to a fixation seat, and a fixation hole is provided on the fixation seat, and a fixation wire is fitted inside the fixation hole.

[0008] Another type of femoral neck plate internal fixation assembly includes a long and narrow plate that can be fitted into the femoral neck, such that the two sides of the plate can press against the inner wall of the femoral neck. Fixation holes are provided on the plate, and fixation screws are fitted into the fixation holes.

[0009] The plate can have cutting edges on both sides to form a cutting edge, so that after the plate is implanted into the femoral neck, the cutting edge can cut into the inner wall of the femoral neck.

[0010] Furthermore, a circular perforation or a strip-shaped perforation extending along the length direction can be provided through the distal end of the plate, and a corresponding fixing screw is provided. The fixing screw is fixed in the circular perforation or strip-shaped perforation after passing through the distal bone of the neck.

[0011] Furthermore, a circular perforation or a strip-shaped perforation extending along the length direction is provided through the proximal end of the plate, and a corresponding fixing screw is provided. The fixing screw passes through the proximal bone of the neck and is fixed in the circular perforation or strip-shaped perforation.

[0012] Typically, there is a converging guide end at the front of the plate.

[0013] Serrated structures can be distributed on both sides of the plate, on the blade, or on the guide end.

[0014] The fixing base is fixed to the plate as a whole, or it is a separate part, which is fixed together by a fastening structure or locking wire.

[0015] Each circular perforation can be designed with threads on its inner wall, and each circular perforation can be connected to the middle of the corresponding fixed screw through a thread.

[0016] In addition, it is possible that auxiliary plates extend outward from one or both sides of the plate body, or that the auxiliary plates are combined and secured together with the plate body.

[0017] It also includes an intramedullary nail with a flat insertion hole, wherein a flat insertion hole matching the plate is provided through the proximal end of the intramedullary nail for securing the plate. Alternatively, a locking hole 22 is provided on the side wall of the flat insertion hole at a position corresponding to the plate, and a corresponding locking wire is installed.

[0018] The beneficial effects of this invention are: This invention enables rapid assembly to achieve fixation of the femoral neck. Appropriate fixation plates can be selected according to different fracture sites. The fixation plates can be secured in narrow areas of the neck, maintaining the corresponding position of the distal and proximal fracture ends, preventing swaying and twisting.

[0019] In this invention, the blade enters the bone cavity with minimal damage to the loose bone portion of the femoral neck, preserving the main portion of loose bone (primarily the portion in contact with hard bone). The blade cuts into the inner wall of the femoral neck, providing multiple fixed support points, ensuring firm compression and uniform force distribution. This effectively provides sufficient constraint force on the femoral neck in the circumferential direction, preventing problems such as rotation, swaying, and misalignment of the femoral neck.

[0020] The plate has serrated structures distributed on both sides, the blade, or the guide end to facilitate easy cutting into the deep layers of the neck bone, reducing installation difficulty and improving stability.

[0021] The plate and the auxiliary plate can be fitted together, so that the sides or edge plates of the auxiliary plate and the plate are locked into the inner wall of the femoral neck, which can effectively prevent rotation and swinging. When the length of the main plate slot and the auxiliary plate slot is long, a common gap will be formed between the two slots, which has the possibility of inward contraction. This can provide support when the bone sutures increase in the later stage of rehabilitation. The patient's weight pressure during exercise will promote the distal and proximal ends of the fracture to move closer together, and the traction of muscles and ligaments will also promote the two to move closer together. The proximal and distal movement of the distal and proximal ends of the fracture is more conducive to its growth. Attached Figure Description

[0022] Figure 1 This is a structural diagram of the first embodiment of the present invention.

[0023] Figure 2 This is a structural diagram of the second embodiment of the present invention.

[0024] Figure 3 This is a structural diagram of the third embodiment of the present invention.

[0025] Figure 4 This is a structural diagram of the fourth embodiment of the present invention.

[0026] Figure 5 This is a structural diagram of the fifth embodiment of the present invention.

[0027] Figure 6 This is a structural diagram of the sixth embodiment of the present invention.

[0028] Figure 7 This is a structural diagram of the seventh embodiment of the present invention.

[0029] Figure 8 This is a structural diagram of the eighth embodiment of the present invention.

[0030] Figure 9 yes Figure 1 A diagram illustrating the usage status.

[0031] Figure 10 yes Figure 9 A schematic diagram of the internal structure.

[0032] Figure 11 yes Figure 3 A diagram illustrating the usage status.

[0033] Figure 12 yes Figure 4 A diagram illustrating the usage status.

[0034] Figure 13 yes Figure 5 A diagram illustrating the usage status.

[0035] Figure 14 This is a schematic diagram of the usage state of convex 6.

[0036] Figure 15 This is a schematic diagram of the auxiliary positioning frame structure.

[0037] Figure 16 This is a structural diagram of the ninth embodiment of the present invention.

[0038] Figure 17 yes Figure 16 A schematic diagram of the assembly relationship.

[0039] Figure 18 This is a structural diagram of the ninth embodiment of the present invention.

[0040] Figure 19 This is a structural diagram of the tenth embodiment of the present invention.

[0041] Figure 20 This is a structural diagram of the eleventh embodiment of the present invention.

[0042] Figure 21 This is a schematic diagram of a wedge-shaped steel plate structure.

[0043] Figure 22 This is a schematic diagram of the structure of the extended steel plate and the through-bolt.

[0044] Numbering in the diagram: 1. Plate body; 2. Plate blade; 3. Fixing seat; 4. Fixing hole; 5. Front circular perforation; 6. Front strip perforation; 7. Rear circular perforation; 8. Rear strip perforation; 9. Serration; 10. Card slot; 11. Card slot; 12. Rectangular insertion hole; 13. Rectangular plug; 14. Temporary locking screw; 15. Positioning bracket; 16. Main board slot; 17. Auxiliary board slot; 18. Common gap; 19. Intramedullary nail; 20. Flat insertion hole; 21. Locking hole; 22. Positioning groove; 23. Screw hole; 24. Screw; 25. Extension plate surface; 26. Perforation; 27. Through nail; 28. Detailed Implementation

[0045] Traditional fixation for femoral neck fractures involves implanting an intramedullary nail from the root to the tip. This method has problems because the femoral neck consists of an outer layer of hard bone and an inner layer of loose bone, with the loose bone filling the entire bone cavity. The inner loose bone layer is large in volume and has a low density. While the intramedullary nail provides sufficient fixation strength in the outer hard bone layer, its fixation strength in the inner loose bone layer is insufficient; in fact, a large portion of the intramedullary nail is embedded in the inner loose bone layer. Furthermore, the outer diameter of the root and tip of the femoral neck is larger than that of the neck (the fracture site), and in some cases, part of the intramedullary nail protrudes beyond the neck. This results in poor fixation stability. To address this problem, the present invention employs various embodiments of a femoral neck fracture fixation device as follows.

[0046] Example 1: As Figure 1 The image shown is an example of the simplest mode of the present invention. This fixation plate is mainly designed to address the problem that existing internal expansion fixation devices have a large number of components, and each component needs to be selected according to the patient's body shape, making installation difficult and time-consuming during surgery. This technical problem is solved by using a single integrated plate.

[0047] Specifically, the femoral neck plate-type internal fixation assembly includes an elongated plate 1 that can be implanted into the femoral neck, such as... Figure 9 The diagram shows the application of this component plate. It can be seen that a strip-shaped flat hole is drilled or perforated into the bony sidewall at the root of the femoral neck. A suitable plate 1 is selected based on the patient's femoral head size and inserted into the femoral neck cavity through this strip-shaped flat hole. This allows the two sides of the plate to press against the inner wall of the femoral neck. Figure 9 There are two side wall support points A and B. The constraints of points A and B can ensure that the distal end of the fracture does not rotate. Support points C and D in the figure can prevent the plate from swaying.

[0048] The two sides of the plate 1 can be flat, or they can be respectively cut with blades on both sides to form blades 2. After the plate is implanted into the femoral neck, the blades (not sharp blades) can cut into the inner wall of the femoral neck, and there are still two lateral support points A and B. Since the blades on both sides cut into the neck bone of the femoral neck, the distal fracture fragment will not rotate or swing.

[0049] A fixation seat 3 is further connected to the outer end of the plate 1. The fixation seat 3 has a fixation hole 4, and a fixation wire is fitted inside the fixation hole 4. The fixation seat 3 is then fixed to the lateral side of the femoral neck root bone using the vertical or horizontal fixation wires. Figure 9 and Figure 10As can be seen, the plate 1 is supported on the neck of the distal femoral neck, and the fixation seat 3, which is integral with the plate, is fixed on the proximal femoral neck. When the distal and proximal ends of the fracture are aligned, the alignment suture provides support, and the muscle and ligament tissues provide traction. This embodiment can effectively prevent the distal and proximal ends of the fracture from rotating or swaying, thereby achieving the purpose of fixing the distal and proximal femoral neck.

[0050] from Figure 9 It can be seen that the fracture occurred at the proximal end (root) of the femoral neck. Figure 11 It can be seen that the fracture occurred in the distal femoral neck. Figure 13 As can be seen, the fracture occurred in the middle of the femoral neck. This embodiment is mainly applicable to cases such as... Figure 9 The fracture details shown are as follows: Figure 11 and Figure 13 For details regarding fractures, please refer to the subsequent examples.

[0051] In addition, this embodiment may further have a converging guide end at the front of the plate 1, and serrated structures distributed on both sides of the plate, on the blade 2, or on the guide end, so as to facilitate smooth cutting into the deep layer of the neck bone, reduce installation difficulty and improve stability.

[0052] Example 2: A femoral neck plate-type internal fixation component based on Example 1, such as... Figure 3 As shown, a circular perforation 5 is provided at the distal end of the plate 1, and a corresponding fixing screw is provided. The fixing screw passes through the distal cervical bone and is fixed to the circular perforation 5. Its usage state is as follows. Figure 11 As shown, this embodiment can lock the distal end of the plate 1 with a screw, fixing it to the distal bone of the fracture site. Therefore, this embodiment is particularly suitable for fractures occurring at the distal femoral neck, but it is also suitable for fractures occurring at other sites. Figure 9 and Figure 13 The fracture shown is located in any position. Compared to Example 1, this example is more versatile, but requires aiming and drilling into the distal end of the bone and installing the corresponding fixation wire 15. From Figure 11 As can be seen, after the fixation component of this embodiment is applied, there are entry fixation points A and B, which allow the fracture ends to rotate and swing. Fixation point C can fix plate 1 to the femoral neck body, and fixation point E can fix the distal fracture end to plate 1. Its fixation and stability are superior to those of Embodiment 1. However, since bone resorption generally occurs during the bone suture growth and recovery process, the bone suture widens. When bone resorption is significant, this widening can prevent the fracture ends from contacting, affecting healing or even causing healing failure. Based on this situation, Embodiments 1 and 3 do not prevent the distal and proximal fracture ends from approaching each other during bone suture growth, thus promoting bone suture healing more effectively.

[0053] Example 3: A femoral neck plate-type internal fixation component based on Example 1, such as... Figure 4 As shown, a strip-shaped perforation 6 extending along the length direction is penetrated at the distal end of the plate 1, and a corresponding fixing screw is provided. This fixing screw passes through the distal cervical bone and is fixed within the strip-shaped perforation 6. Its usage state is as follows... Figure 12 As shown, this embodiment can lock the distal end of the plate 1 with a screw, fixing it to the distal bone of the fracture as a single unit, retaining only the possibility of axial movement. However, this possibility only occurs in the later stage when bone resorption leads to increased suture depth. In the early stage of fixation, the fixation pin is fixed as close as possible to the inner wall of the strip-shaped perforation 6, thereby providing moderate pressure at both ends of the fracture, which is equivalent to the function of embodiment 2. Unlike embodiment 2, in the later stage when bone resorption leads to increased suture depth, the fixation pin of this embodiment can slide within the strip-shaped perforation 6, thus no longer restricting axial movement, but still preventing rotation and swinging. When the patient moves, the pressure of body weight will cause the distal and proximal ends of the fracture to move closer together, and the traction of muscle and ligament tissues will also cause them to move closer together. Generally, proximal and distal movement of the distal and proximal ends of the fracture is more conducive to its growth. This embodiment is also applicable to cases such as Figure 9 and Figure 13 The fracture shown is located in any position. Compared to Example 1, this example is more versatile, but requires aiming and drilling into the distal end of the bone and installing the corresponding fixation wire 15. From Figure 11 As can be seen, after the fixation component of this embodiment is applied, there are cutting fixation points A and B, which can rotate and swing at both ends of the fracture. Fixation point C can fix the plate 1 to the femoral neck body, and fixation point E can fix the distal end of the fracture to the plate 1. Its fixation and stability are better than those of embodiment 1.

[0054] Example 4: Based on Example 2, such as Figure 5 As shown, a circular perforation 7 is further provided through the proximal end of the plate 1, and a corresponding fixing screw 15 is provided. This fixing screw passes through the proximal bone of the neck and is fixed in the circular perforation 7. Figure 13 The embodiment shown here can reinforce the proximal end of the fracture compared to embodiment 2.

[0055] Example 5: A femoral neck plate-type internal fixation assembly includes a long, narrow plate adaptable for implantation into the femoral neck, such that the two sides of the plate can press against the inner wall of the femoral neck. Fixation holes are provided on the plate, and fixation screws are fitted into the fixation holes. One implementation is as follows: Figure 6 As shown, a strip-shaped perforation 8 extending along the length direction is penetrated through the proximal end of the plate 1, and a corresponding fixing screw is provided. This fixing screw passes through the proximal cervical bone and is fixed within the strip-shaped perforation 8. Figure 14This embodiment, as shown, can reinforce the proximal end of a fracture compared to Embodiment 2. Due to the use of the strip-shaped perforation 8, when the rear end of the plate 1 is directly connected to the fixation plate 3, its function is the same as in Embodiments 2 and 4. When the rear end is movably connected to the fixation seat 3, the initial fixation pin quickly approaches the inner wall of the strip-shaped perforation 8 for fixation, thereby providing appropriate pressure at both ends of the fracture, a function equivalent to Embodiments 2 and 4. Unlike Embodiments 2 and 4, in the later stage when bone resorption leads to increased suture depth, the fixation pin in this embodiment can slide within the strip-shaped perforation 8, thus no longer restricting axial movement, but still preventing rotation and swaying. During patient movement, body weight pressure will cause the distal and proximal ends of the fracture to move closer together, and the traction of muscles and ligaments will also cause them to move closer together. Generally, proximal and distal movement of the fracture ends is more conducive to its growth. Some functions, such as those in Embodiment 2, will not be repeated.

[0056] Example 6: Based on Example 5, a structure is adopted to snap the plate 1 and the card holder 10 together, such as... Figure 7 As shown, the mounting base 10 is an H-shaped plate with symmetrical mounting grooves 11 on the top and bottom, and multiple fixing holes 4, which can be fixed to the lateral side of the femoral neck root. The rear end of the plate 1 is designed with a rear plate mounting groove 12, and the mounting grooves 11 can be completely matched and connected with the plate mounting grooves 12. Therefore, after connection, the plate 1 and the mounting base 10 cannot rotate or swing, but axial movement may occur. This function is similar to that of Embodiment 1, but this embodiment allows for a strip-shaped perforation 8 extending along the length direction through the proximal end of the plate 1, and is equipped with a corresponding fixing screw. This fixing screw passes through the proximal neck bone and is fixed within the strip-shaped perforation 8. Thus, it has a function similar to that of Embodiment 5.

[0057] Example 7: Based on Example 5, a structure is adopted to snap the plate 1 and the fixing base 3 together, such as... Figure 8 As shown, the fixation base 3 has rectangular insertion holes 13 and multiple fixation holes 4 on its plate body, which can be fixed to the lateral side of the femoral neck root. The rear end of the plate body 1 is designed with a protruding rectangular insertion strip 14, which can perfectly match and mate with the rectangular insertion holes 13. The plate body and fixation base are pre-supported by temporary locking wires 15, which can be removed after installation. It can be seen that the plate body 1 and fixation base 3 cannot rotate or swing after mating, but axial movement may occur. This function is similar to that of Embodiment 1, but this embodiment allows for a strip-shaped perforation 8 extending along the length direction through the proximal end of the plate body 1, and is equipped with a corresponding fixing screw. This fixing screw passes through the proximal neck bone and is fixed within the strip-shaped perforation 8. Thus, it has a function similar to that of Embodiment 5.

[0058] Example 8: Regarding the structural forms of the above embodiments, when positioning holes are provided on the plate, it is necessary to drill holes from the outside towards the distal or proximal end of the femoral neck, using a method such as... Figure 15The positioning frame 16 shown is an L-shaped structure, including a rear seat and two parallel spaced support plates. The rear seat is fixed together with the fixed seat. Each support plate has a guide hole at a corresponding position. The position of each guide hole corresponds to the position of the positioning hole on the plate and is coaxial. By using the direction of the guide holes on the two external support plates as a guide or reference, drilling and locking holes can be performed smoothly.

[0059] Example 9: Based on Example 1, an auxiliary plate extends outward from one or both sides of the plate 1, and the web is fixed integrally with the plate body, or the auxiliary plate is combined and secured to the plate body 1. This embodiment adopts the following... Figure 16 and Figure 17 The combined assembly structure shows that the motherboard has a motherboard slot 17 on the front side of the main board, and an auxiliary board slot 18 in the middle of the rear side of the auxiliary board. The thickness of the main board and the auxiliary board is the same, and their widths are also the same as those of each slot. Figure 17 After inserting the two plates into their respective slots, a cross structure is formed, meaning the plate body and the auxiliary plate are perpendicular. In this embodiment, the auxiliary plate is first inserted into the femoral neck cavity, with its two sides or edge edges securing it to the inner wall of the femoral neck. Then, the plate body is inserted vertically, with its two sides or edge edges securing it to the inner wall of the femoral neck. Finally, the fixing seat is fixed to the outer wall of the femoral neck root. As can be seen, after installation, the auxiliary plate and the plate body's sides or edge edges are secured to the inner wall of the femoral neck, effectively preventing rotation and swaying.

[0060] Furthermore, when the lengths of the mainboard slot 17 and the auxiliary plate slot 18 are relatively long, a common gap 19 will be formed between the two slots. This common gap 19 does not affect the anti-rotation and anti-sway functions of the distal and proximal fracture ends. However, after the two plates are fixed to the distal and proximal fracture ends respectively by fixing screws, the common gap 19 between the two plates may contract inward. This can provide support for the distal and proximal fracture ends to move closer together when the sutures increase in the later stages of rehabilitation, as the patient's weight-bearing pressure during movement will promote the movement of the distal and proximal fracture ends. The traction of muscles and ligaments will also promote the movement of the distal and proximal fracture ends, which is more conducive to their growth.

[0061] Example 10: Based on the above examples, it also includes an intramedullary nail 20 with a flat insertion hole, such as... Figure 18 As shown, a flat insertion hole 21 matching the plate body is provided through the proximal end of the intramedullary nail 20 for securing the plate body 1.

[0062] Furthermore, such as Figure 19 As shown, a lock hole 22 can also be provided on the side wall of the flat insertion hole 21 at a position corresponding to the plate body, and a corresponding lock wire can be installed.

[0063] In this procedure, the intramedullary nail is implanted into the femoral cavity, the plate is implanted into the femoral neck, and the plate is fixed together with the intramedullary nail.

[0064] Example 11: Based on Example 10, a screw hole 24 is provided axially at the proximal end of the intramedullary nail and a screw 25 is installed. At the same time, a positioning groove 23 is provided on the side of the plate 1. After the plate is inserted into the side insertion hole 21, the screw 25 is screwed in so that its inner end presses against the positioning groove 23 to fix the plate.

[0065] It should be noted that the width of the motherboard slot 17 and the auxiliary board slot 18 can also be slightly larger than the thickness of the auxiliary board and the board body, so that after the side blades of the auxiliary board and the board body cut into the neck bone, the inner walls of the motherboard slot 17 and the auxiliary board slot 18 are pressed against the surface of the auxiliary board and the board body respectively. The moderate bending of the root of the motherboard slot 17 and the auxiliary board slot 18 can further improve the support strength.

[0066] Example 12: Based on the above examples, the two sides of the plate 1 are parallel, or the two sides gradually converge from the outer end to the inner end, such as... Figure 21 As shown, it is a wedge-shaped structure.

[0067] Example 13: Based on the above examples, perforations 27 are provided on one or both sides of the extended plate surface 26 of the fixation base 3, and fixed pins 28 are fitted inside the perforations 27. The pins 28 on both sides are inserted into the inner wall of the femoral neck medullary canal on both sides of the steel plate, parallel or approximately parallel to the plate body 1. Alternatively, pins 28 are fixed on the fixation base 3, and the pins on both sides are inserted into the inner wall of the femoral neck medullary canal on both sides of the steel plate, parallel to the axis of the plate body 1.

[0068] It should be understood that the specific embodiments described above are merely illustrative or explanatory of the principles of the invention and do not constitute a limitation thereof. Therefore, any modifications, equivalent substitutions, or improvements made without departing from the spirit and scope of the invention should be included within the scope of protection of the invention. For example, it is possible to sharpen the distal end D of the plate and insert it into the inner wall of the bone; in this fixing method, point D is a straight blade, which can further improve stability. Alternatively, the plate can be modified or structurally altered, or irregularly shaped fixing seats can be connected or mated to the outside of the plate. It is also possible to provide a convex-concave structure on the surface of the plate, giving the two sides of the plate convex-concave characteristics, thus creating an interlocking constraint relationship with the loose bone portion within the medullary cavity. It is also possible to have a blade at the front end of the plate, with serrations on the blade, or some of the serrations tilting to one side and the other side of the plate.

Claims

1. A femoral neck plate-type internal fixation assembly, characterized in that, The device includes a long, narrow plate (1) that can be fitted into the femoral neck, allowing the two sides of the plate to press against the inner wall of the femoral neck. The outer end of the plate (1) is connected to a fixation seat (3), and the fixation seat (3) is provided with a fixation hole (4), in which a fixation wire is fitted. A circular perforation (5) or a strip-shaped perforation (6) extending along the length direction is provided through the distal end of the plate (1), and a corresponding fixation wire is provided. The fixation wire passes through the distal bone of the neck and is fixed in the circular perforation (5) or the strip-shaped perforation (6). The distal end of the plate (1) is locked by the wire, making it fixed to the distal bone of the fracture as one unit, leaving only the possibility of axial movement. In the early stage of fixation, the fixation nail is fixed as close as possible to the inner wall of the strip-shaped perforation (6) to provide fracture protection. With moderate pressure at both ends, in the later stage of bone resorption leading to increased bone sutures, the fixation nail can slide in the strip perforation (6) and no longer restrict axial movement, but can still prevent rotation and swing. When the patient moves, the weight pressure will cause the distal and proximal ends of the fracture to move closer, and the traction of muscles and ligaments will also cause them to move closer. Auxiliary plates extend outward from one side or both sides of the plate body (1). The auxiliary plates are fixed to the plate body as one unit or the auxiliary plates are combined and fixed together with the plate body (1) as a combined set structure. There is a main plate slot (17) on the front side of the plate body and an auxiliary plate slot (18) in the middle of the rear side of the auxiliary plate. The thickness of the plate body and the auxiliary plate is the same, and the width of each slot is the same. After the slots of the two plates are respectively inserted into the set, a cross structure is formed, that is, the plate body and the auxiliary plate are perpendicular.

2. The femoral neck plate-type internal fixation assembly according to claim 1, characterized in that, The plate (1) has a cutting edge on each side to form a cutting edge (2), so that after the plate is implanted into the femoral neck, the cutting edge (2) can cut into the inner wall of the femoral neck.

3. The femoral neck plate-type internal fixation assembly according to claim 1, characterized in that, A circular perforation (7) or a strip-shaped perforation (8) extending along the length direction is provided through the proximal end of the plate (1), and a corresponding fixing screw is provided. The fixing screw is fixed in the circular perforation (7) or the strip-shaped perforation (8) after passing through the proximal bone of the neck.

4. The femoral neck plate-type internal fixation assembly according to claim 2, characterized in that, The two sides of the plate, the blade (2), or the guide end are covered with serrated structures.

5. The femoral neck plate-type internal fixation assembly according to claim 1, characterized in that, The fixing seat (3) is fixed to the plate (1) as one piece, or it is separate and fixed together by a fastening structure or locking wire.

6. The femoral neck plate-type internal fixation assembly according to claim 1, characterized in that, A perforation (27) is provided on one or both sides of the extended plate surface (26) of the fixation seat (3), and a fixed pin (28) is fitted inside the perforation (27). The pins (28) on both sides are inserted into the inner wall of the femoral neck medullary canal on both sides of the steel plate, parallel or approximately parallel to the plate body (1). Alternatively, a pin (28) is fixed on the fixation seat (3), and the pins on both sides are inserted into the inner wall of the femoral neck medullary canal on both sides of the steel plate, parallel to the axis of the plate body (1).

7. The femoral neck plate-type internal fixation assembly according to claim 1, characterized in that, It also includes an intramedullary nail (20) with a flat insertion hole, that is, a flat insertion hole (21) matching the plate body is provided through the proximal end of the intramedullary nail for securing the plate body.

8. The femoral neck plate-type internal fixation assembly according to claim 7, characterized in that, A lock hole (22) is provided on the side wall of the flat insertion hole (21) at the position corresponding to the plate body, and a corresponding lock wire is installed.

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