A triangular internal fixation and strengthening device for femoral neck fracture

Abstract

The present invention provides a triangular internal fixation and reinforcement device for femoral neck fracture, belonging to the technical field of femoral neck fracture surgery; the device comprises a main steel plate and an auxiliary steel plate, wherein a head nail is inserted on the surface of the main steel plate, a rotor is rotatably connected to the upper surface of the head nail, an auxiliary nail is inserted on the surface of the main steel plate, a locking assembly is provided on the inner surface of the nail, the locking assembly is used to fix the relative position between the rotor and the nail, and a connecting assembly is rotatably connected to the surface of the auxiliary steel plate, the connecting assembly is used to fix the relative position between the main steel plate and the auxiliary steel plate; by arranging the nail, the locking assembly and the connecting assembly, the arrangement of the nail can improve the stability of the head nail, the arrangement of the rotor can facilitate doctors to locate the position of the insertion hole on the surface of the rotor, and the arrangement of the locking assembly can make the cooperation between the head nail and the nail more stable; the arrangement of the connecting assembly can not only facilitate doctors to fix the auxiliary steel plate on the side surface of the femur, but also fix the position of the auxiliary steel plate.

Description

Technical Field

[0001] The invention relates to the technical field of femoral neck fracture surgery, and in particular to a triangular internal fixation and strengthening device for femoral neck fracture. Background Art

[0002] Proximal femoral fractures in the elderly are one of the most common types of fractures in clinical practice, accounting for about 3.6% of all fractures in the body and 48% to 54% of hip fractures. Conservative treatment of proximal femoral fractures requires long-term bed rest, which can lead to a series of complications. Currently, 33% of patients with surgical treatment experience nonunion in the long term, and 33% of patients experience femoral head necrosis. During femoral head surgery, doctors usually place a steel plate on the fractured or damaged femoral head, and then fix the plate with screws.

[0003] In order to ensure the stability of the screws and steel plates, the screws and steel plates are usually inserted into the bone in a triangular structure. However, at present, most steel plates and screws can only form a triangular structure on a plane. After all, the femur is a three-dimensional structure in the human body. Therefore, 33% of patients with long-term surgical treatment suffer from bone nonunion and 33% of patients suffer from femoral head necrosis. For this reason, the present application provides a triangular internal fixation and reinforcement device for femoral neck fractures to meet the needs. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a triangular internal fixation and reinforcement device for femoral neck fracture by arranging a pin, a rotor, a locking assembly and a connecting assembly. The arrangement of the pin can improve the stability of the head pin, the arrangement of the rotor can facilitate the doctor to locate the position of the insertion hole on the surface of the rotor, and the arrangement of the locking assembly can make the cooperation between the head pin and the pin more stable; the arrangement of the connecting assembly can not only facilitate the doctor to fix the auxiliary steel plate on the lateral surface of the femur, but also fix the position of the auxiliary steel plate by fixing screws, thereby preventing the position of the auxiliary steel plate from shifting during the process of fixing the pin by the doctor. The above arrangement can solve the problem that bone nonunion and femoral head necrosis are prone to occur in patients with long-term surgical treatment.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0006] A triangular internal fixation and reinforcement device for femoral neck fracture, comprising a main steel plate and an auxiliary steel plate, wherein a head nail is inserted on the surface of the main steel plate, and a rotor is rotatably connected to the upper surface of the head nail, an auxiliary nail is inserted on the surface of the main steel plate, a side nail is inserted on the surface of the main steel plate, a plug nail is inserted on the surface of the auxiliary steel plate, and a fixing nail is inserted on the surface of the auxiliary steel plate, a locking assembly is provided on the inner surface of the plug nail, the locking assembly is used to fix the relative position between the rotor and the plug nail, the locking assembly is connected to the plug nail, a connecting assembly is rotatably connected on the surface of the auxiliary steel plate, the connecting assembly is used to fix the relative position between the main steel plate and the auxiliary steel plate, and the connecting assembly is respectively connected to the main steel plate and the auxiliary steel plate.

[0007] Preferably, the head nail and the inner surface of the rotor are both provided with an insertion rod, and the outer surface of the rotor is provided with anti-slip grooves.

[0008] Preferably, the locking assembly includes an adjusting rod slidably connected to the inner surface of the pin, one end of the adjusting rod is rotatably connected to a top block, the outer surface of the top block is fixedly connected to a toothed plate, the surface of the pin is rotatably connected to a toothed disk, the surface of the toothed disk is fixedly connected to a clamping block, and the surfaces of the pin and the rotor are both provided with clamping grooves.

[0009] Preferably, the inner surface of the toothed disc is rotatably connected with a rotating shaft, the toothed disc and the inserted pin are connected via the rotating shaft, and the number of the toothed disc and the number of the toothed plate are both two.

[0010] Preferably, the adjusting rod is connected to the inserting pin via a threaded connection.

[0011] Preferably, the connecting assembly includes a positioning rod rotatably connected to the surface of the auxiliary steel plate, one end of the positioning rod is fixedly connected to a fixing block, a fixing screw is inserted into the surface of the fixing block, one end of the positioning rod away from the fixing block is rotatably connected to a rotating rod, and the surface of the auxiliary steel plate is fixedly connected to a connecting block.

[0012] Preferably, the number of the positioning rods and the fixing blocks are both two groups, the auxiliary steel plate and the main steel plate are connected via the positioning rods and the fixing blocks, and the positioning rods and the auxiliary steel plate are rotationally connected via the connecting blocks and the rotating rods.

[0013] Preferably, a drug injection hole is provided on the surface of the auxiliary nail, and a drug outlet hole is provided on the outer surface of the auxiliary nail, and the drug outlet holes are provided in three groups.

[0014] Preferably, the number of the auxiliary nails is two groups, and the number of the side nails is three groups.

[0015] Compared with the prior art, the present invention has at least the following beneficial effects:

[0016] In the above scheme, by setting the pin, rotor, locking assembly and connecting assembly, the pin is inserted into the inside of the rotor, which can limit and support the head pin, and such an arrangement can improve the stability of the head pin; the rotor can rotate freely on the upper surface of the head pin, and such an arrangement can facilitate the doctor to locate the position of the insertion hole on the surface of the rotor; the locking assembly can lock the pin on the inner surface of the rotor, and such an arrangement can make the cooperation between the head pin and the pin more stable; the setting of the connecting assembly can not only facilitate the doctor to fix the auxiliary steel plate on the lateral surface of the femur, but also fix the position of the auxiliary steel plate by fixing the screws, thereby preventing the position of the auxiliary steel plate from shifting during the process of the doctor fixing the pin. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings, which are incorporated herein and constitute a part of the specification, illustrate embodiments of the present disclosure and, together with the description, further serve to explain the principles of the present disclosure and to enable those skilled in the relevant art to make and use the present disclosure.

[0018] Figure 1 It is a schematic diagram of the three-dimensional structure of the triangular internal fixation and reinforcement device for femoral neck fracture;

[0019] Figure 2 It is a schematic diagram of the exploded three-dimensional structure of the triangular internal fixation and strengthening device for femoral neck fracture;

[0020] Figure 3 It is an enlarged three-dimensional structural diagram of the head nail, the insert nail, the main steel plate and the auxiliary nail;

[0021] Figure 4 It is a schematic diagram of the cross-sectional three-dimensional structure of the head nail and the adjusting rod;

[0022] Figure 5 It is a schematic diagram of the cross-sectional three-dimensional structure of the auxiliary nail and the injection hole;

[0023] Figure 6 It is a schematic diagram of the cross-sectional three-dimensional structure of the head nail and the insertion nail;

[0024] Figure 7 It is a schematic diagram of the cross-sectional three-dimensional structure of the pin and the locking assembly;

[0025] Figure 8 for Figure 7 A schematic diagram of the local enlarged structure at point A in the middle;

[0026] Fig. 9 It is a schematic diagram of the cross-sectional three-dimensional structure of the locking assembly and the head nail;

[0027] Fig.10 Schematic diagram of the explosion three-dimensional structure of the main steel plate, auxiliary steel plate and connecting components;

[0028] Fig.11 for Fig.10 Schematic diagram of the local enlarged structure at point B in the middle.

[0029] [reference numerals]

[0030] 1. Main steel plate; 2. Head nail; 3. Rotor; 4. Insert rod; 5. Auxiliary nail; 6. Auxiliary steel plate; 7. Insert nail; 8. Adjustment rod; 9. Side nail; 10. Fixing nail; 11. Medicine outlet hole; 12. Medicine injection hole; 13. Top block; 14. Tooth plate; 15. Tooth disc; 16. Block; 17. Rotating shaft; 18. Slot; 19. Positioning rod; 20. Fixing block; 21. Fixing screw; 22. Connecting block; 23. Rotating rod.

[0031] As shown in the figure, in order to clearly implement the structure of the embodiment of the present invention, specific structures and devices are marked in the figure, but this is only for illustrative purposes and is not intended to limit the present invention to the specific structure, device and environment. According to specific needs, ordinary technicians in this field can adjust or modify these devices and environments, and the adjustments or modifications made are still included in the scope of the attached claims. DETAILED DESCRIPTION

[0032] The following is a detailed description of a triangular internal fixation and strengthening device for femoral neck fracture provided by the present invention in conjunction with the accompanying drawings and specific embodiments. At the same time, it is explained here that in order to make the embodiments more detailed, the following embodiments are the best and preferred embodiments, and those skilled in the art may also adopt other alternatives to implement some known technologies; and the accompanying drawings are only for a more specific description of the embodiments, and are not intended to specifically limit the present invention.

[0033] It should be noted that the references to "one embodiment", "an embodiment", "an exemplary embodiment", "some embodiments" and the like in the specification indicate that the embodiments described may include specific features, structures or characteristics, but not every embodiment may include the specific features, structures or characteristics. In addition, when a specific feature, structure or characteristic is described in conjunction with an embodiment, it should be within the knowledge of a person skilled in the art to implement such feature, structure or characteristic in conjunction with other embodiments (whether or not explicitly described).

[0034] In general, a term can be understood, at least in part, from its use in context. For example, depending, at least in part, on the context, the term "one or more" as used herein can be used to describe any feature, structure, or characteristic in the singular sense, or can be used to describe a combination of features, structures, or characteristics in the plural sense. Additionally, the term "based on" can be understood as not necessarily intended to convey an exclusive set of factors, but can instead, depending, at least in part, on the context, allow for the presence of other factors that are not necessarily explicitly described.

[0035] It will be understood that the meaning of “on,” “over,” and “above” in this disclosure should be interpreted in the broadest manner, so that “on” means not only “directly on” something, but also includes the meaning of being “on” something with intervening features or layers therebetween, and “on” or “over” means not only “on” or “above” something, but also includes the meaning of being “on” or “above” something with no intervening features or layers therebetween.

[0036] Additionally, spatially relative terms such as "under," "beneath," "lower," "above," "upper," and the like may be used herein for descriptive convenience to describe the relationship of one element or feature to another element or features, as shown in the accompanying drawings. Spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the accompanying drawings. The device may be oriented in other ways, and the spatially relative descriptors used herein may be similarly interpreted accordingly.

[0037] like Figure 1-Figure 11 As shown, an embodiment of the present invention provides a triangular internal fixation and reinforcement device for femoral neck fracture, including a main steel plate 1 and an auxiliary steel plate 6, a head nail 2 is inserted on the surface of the main steel plate 1, and a rotor 3 is rotatably connected to the upper surface of the head nail 2, an auxiliary nail 5 is inserted on the surface of the main steel plate 1, and the number of the auxiliary nails 5 is two groups, a side nail 9 is inserted on the surface of the main steel plate 1, and the number of the side nails 9 is three groups, a pin 7 is inserted on the surface of the auxiliary steel plate 6, and a fixing pin 10 is inserted on the surface of the auxiliary steel plate 6, and a locking assembly is provided on the inner surface of the pin 7, and the locking assembly is connected to the pin 7, and a connecting assembly is rotatably connected to the surface of the auxiliary steel plate 6, and the connecting assembly is used to fix the relative position between the main steel plate 1 and the auxiliary steel plate 6, and the connecting assembly is respectively connected to the main steel plate 1 and the auxiliary steel plate 6.

[0038] In this embodiment, if Figure 1 and Figure 2 As shown, the inner surfaces of the head nail 2 and the rotor 3 are both provided with an insertion rod 4, and the outer surface of the rotor 3 is provided with anti-slip grooves.

[0039] As an implementation method in this embodiment, Figure 6-Figure 9As shown, the locking assembly includes an adjusting rod 8 slidably connected to the inner surface of the pin 7, one end of the adjusting rod 8 is rotatably connected to a top block 13, the outer surface of the top block 13 is fixedly connected to a toothed plate 14, the surface of the pin 7 is rotatably connected to a toothed disc 15, the surface of the toothed disc 15 is fixedly connected to a clamping block 16, and the surfaces of the pin 7 and the rotor 3 are both provided with a clamping groove 18. Since the parameters of the thread matching relationship between the adjusting rod 8 and the inner surface of the pin 7 are consistent, the user can achieve the effect of changing the position of the adjusting rod 8 by rotating the adjusting rod 8, so that the adjusting rod 8 can be freely extended and retracted on the inner surface of the pin 7. During the extension and retraction process of 8, the top block 13 will slide inside the pin 7 along with the adjusting rod 8. Since the tooth pattern matching parameters of the tooth plate 14 and the tooth disc 15 are consistent, the top block 13 will drive the tooth disc 15 to rotate during the extension and retraction process. During the rotation of the tooth disc 15, the clamping block 16 will be clamped in the clamping groove 18. In this way, when the pin 7 is inserted into the surface of the rotor 3, the doctor can rotate the adjusting rod 8 to lock the pin 7 on the inner surface of the rotor 3. This setting can lock the position between the pin 7 and the head pin 2, thereby making the matching between the head pin 2 and the pin 7 more stable.

[0040] In this embodiment, if Figure 8 As shown, the inner surface of the toothed disc 15 is rotatably connected with a rotating shaft 17, and the toothed disc 15 and the pin 7 are connected via the rotating shaft 17. The number of the toothed disc 15 and the number of the toothed plate 14 are both two groups.

[0041] In this embodiment, if Figure 6 and Figure 7 As shown, the adjusting rod 8 is connected to the inserting pin 7 via threads.

[0042] As an implementation method in this embodiment, Fig.10 and Fig.11 As shown, the connecting assembly includes a positioning rod 19 rotatably connected to the surface of the auxiliary steel plate 6, one end of the positioning rod 19 is fixedly connected to a fixing block 20, and a fixing screw 21 is inserted on the surface of the fixing block 20, and the end of the positioning rod 19 away from the fixing block 20 is rotatably connected to a rotating rod 23, and the surface of the auxiliary steel plate 6 is fixedly connected to a connecting block 22. Since the positioning rod 19 and the auxiliary steel plate 6 are rotatably connected through the connecting block 22 and the rotating rod 23, the user can adjust the position of the auxiliary steel plate 6 through the positioning rod 19. During actual operation, the doctor can place the auxiliary steel plate 6 on the lateral surface of the femur through the positioning rod 19. Such a setting can facilitate the doctor to arrange and install the auxiliary steel plate 6. When the auxiliary steel plate 6 is arranged, the positioning rod 19 is fixed to the surface of the main steel plate 1 through the fixing block 20 and the fixing screw 21. In this way, under the fixing action of the positioning rod 19 and the fixing block 20, the position of the auxiliary steel plate 6 is not easy to shift during the doctor's installation of the pin 7.

[0043] In this embodiment, if Fig.10 and Fig.11 As shown, the number of the positioning rods 19 and the fixing blocks 20 are both two groups, the auxiliary steel plate 6 and the main steel plate 1 are connected by the positioning rods 19 and the fixing blocks 20, and the positioning rods 19 and the auxiliary steel plate 6 are rotationally connected by the connecting blocks 22 and the rotating rods 23.

[0044] In this embodiment, if Figure 5 As shown, the surface of the auxiliary nail 5 is provided with a drug injection hole 12, and the outer surface of the auxiliary nail 5 is provided with a drug outlet hole 11. The number of the drug outlet holes 11 is three groups. The doctor can inject bone cement for osteoporosis or drugs that promote osteogenesis into the inner surface of the auxiliary nail 5 through the drug injection holes 12, and then the drugs will flow out from the outer surface of the auxiliary nail 5 along the drug outlet holes 11. This arrangement is to facilitate doctors to inject drugs into the patient's femur.

[0045] The technical solution provided by the present invention, by setting a pin, a rotor, a locking assembly and a connecting assembly, the head pin and the rotor can rotate with each other, so that when the doctor fixes the head pin, he needs to first insert the insertion rod into the inside of the head pin and the rotor, and then rotate the insertion rod to drive the head pin into the inside of the femur through the thread. When the head pin and the auxiliary pin are inserted, the main steel plate, the head pin and the auxiliary pin can form a stable triangular structure, so that the overall structure of the fixation reinforcement device has sufficient stability.

[0046] After the head nail is fixed, the insertion rod can be taken out to fix the nail. The nail can completely pass through the trochanter. After the nail is inserted, the nail, head nail, auxiliary steel plate and main steel plate can form multiple sets of triangular structures in space. This design can further improve the stability and reliability of the fixation and reinforcement device. In the fixation and reinforcement device, the head nail runs through the entire femur, so the head nail plays a core supporting and fixing role for the femur. Inserting the nail inside the trochanter can not only limit and support the head nail, but also further prevent the head nail from shifting in position.

[0047] The pin passes through the rotor through the hole on the surface of the rotor. The rotor can rotate freely on the surface of the head pin. The angle of the hole on its surface also changes during the rotation of the rotor. In addition, the doctor can change the position of the hole by changing the number of turns of the head pin inserted into the internal thread of the femur. In this way, the position and angle of the hole can be adjusted. This setting can facilitate the doctor to locate the position of the hole, thereby improving the efficiency of fixing the pin.

[0048] Since the parameters of the matching relationship between the adjusting rod and the inner surface thread of the pin are consistent, the user can change the position of the adjusting rod by turning the adjusting rod, so that the adjusting rod can freely extend and retract on the inner surface of the pin, and the top block will slide inside the pin along with the adjusting rod during the extension and retraction of the adjusting rod. Since the parameters of the matching relationship between the tooth pattern on the tooth plate and the toothed disc surface are consistent, the toothed disc will be driven to rotate during the extension and retraction of the top block, and the toothed disc will be driven to be stuck in the slot during the rotation of the toothed disc. In this way, when the pin is inserted into the rotor surface, the doctor can lock the pin to the inner surface of the rotor by turning the adjusting rod. This setting can lock the position between the pin and the head pin, thereby making the fit between the head pin and the pin more stable.

[0049] Since the auxiliary steel plate is designed on the lateral surface of the femur, a connecting assembly is provided on the outer surface of the auxiliary steel plate for the convenience of the doctor in fixing the auxiliary steel plate during actual operation. Since the positioning rod and the auxiliary steel plate are rotatably connected by the connecting block and the rotating rod, the user can adjust the position of the auxiliary steel plate through the positioning rod. The doctor can place the auxiliary steel plate on the lateral surface of the femur through the positioning rod during actual operation. Such a setting can facilitate the doctor to arrange and install the auxiliary steel plate. When the auxiliary steel plate is arranged, the positioning rod is fixed to the surface of the main steel plate by the fixing block and the fixing screw. In this way, under the fixing action of the positioning rod and the fixing block, the position of the auxiliary steel plate is not easily displaced during the doctor's installation of the pins.

[0050] The present invention covers any substitution, modification, equivalent method and scheme made on the essence and scope of the present invention. In order to make the public have a thorough understanding of the present invention, specific details are described in detail in the following preferred embodiments of the present invention, but those skilled in the art can fully understand the present invention without the description of these details. In addition, in order to avoid unnecessary confusion about the essence of the present invention, well-known methods, processes, procedures, components and circuits are not described in detail.

[0051] A person skilled in the art will appreciate that all or part of the steps in the above-mentioned embodiment method can be completed by instructing related hardware through a program, and the program can be stored in a computer-readable storage medium, such as ROM / RAM, a disk, an optical disk, etc.

[0052] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A triangular internal fixation and strengthening device for femoral neck fracture, comprising a main steel plate and an auxiliary steel plate, characterized in that: A head nail is inserted on the surface of the main steel plate, a rotor is rotatably connected to the upper surface of the head nail, an auxiliary nail is inserted on the surface of the main steel plate, a side nail is inserted on the surface of the main steel plate, a plug nail is inserted on the surface of the auxiliary steel plate, and a fixing nail is inserted on the surface of the auxiliary steel plate; The inner surface of the pin is provided with a locking assembly, the locking assembly is used to fix the relative position between the rotor and the pin, and the locking assembly is connected to the pin; The surface of the auxiliary steel plate is rotatably connected with a connecting assembly, the connecting assembly is used to fix the relative position between the main steel plate and the auxiliary steel plate, and the connecting assembly is connected to the main steel plate and the auxiliary steel plate respectively; The locking assembly comprises an adjusting rod threadedly connected to the inner surface of the pin, one end of the adjusting rod is rotatably connected to a top block, the outer surface of the top block is fixedly connected to a toothed plate, the surface of the pin is rotatably connected to a toothed disc, the surface of the toothed disc is fixedly connected to a clamping block, and the inner surfaces of the pin and the rotor are both provided with clamping grooves; The inner surface of the toothed disc is rotatably connected with a rotating shaft, the toothed disc and the inserted pin are connected via the rotating shaft, and the number of the toothed disc and the toothed plate are both two groups; The pins can completely pass through the rotor. After the pins are inserted, the pins, head pins, auxiliary steel plates and main steel plates can form multiple sets of triangular structures in space. The connection assembly comprises a positioning rod rotatably connected to the surface of the auxiliary steel plate, one end of the positioning rod is fixedly connected to a fixing block, a fixing screw is inserted on the surface of the fixing block, one end of the positioning rod away from the fixing block is rotatably connected to a rotating rod, and the surface of the auxiliary steel plate is fixedly connected to a connecting block; The number of the positioning rods and the fixing blocks are both two groups, the auxiliary steel plate and the main steel plate are connected by the positioning rods and the fixing blocks, and the positioning rods and the auxiliary steel plate are rotatably connected by the connecting blocks and the rotating rods; The user can change the position of the adjusting rod by rotating the adjusting rod. During the movement of the adjusting rod, the top block will slide inside the pin along with the adjusting rod. Since the parameters of the tooth pattern matching between the tooth plate and the tooth disc are consistent, the tooth disc will be driven to rotate during the sliding process of the top block. During the rotation of the tooth disc, the card block will be driven to be stuck in the card slot of the rotor, thereby locking the pin to the inner surface of the rotor.

2. The triangular internal fixation and strengthening device for femoral neck fracture according to claim 1, characterized in that: Insertion rods are inserted into the inner surfaces of the head nail and the rotor, and anti-slip grooves are arranged on the outer surface of the rotor.

3. The triangular internal fixation and strengthening device for femoral neck fracture according to claim 1, characterized in that: The surface of the auxiliary nail is provided with a medicine injection hole, and the outer surface of the auxiliary nail is provided with a medicine outlet hole, and the number of the medicine outlet holes is three groups.

4. The triangular internal fixation and strengthening device for femoral neck fracture according to claim 1, characterized in that: The number of the auxiliary nails is two groups, and the number of the side nails is three groups.

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