Adjustable expandable nail plate system for surgical neck of humerus fracture

Abstract

The utility model discloses special adjustable expansion nail plate system of humeral surgical neck fracture, including fixed plate and fixed mechanism, fixed plate: its inside middle is provided with the installation groove, and fixed mechanism: it includes expansion nail, sliding ring, fixed net, bone graft groove and fixed assembly, and expansion nail sets up in the inside of installation groove, and the upper and lower both ends of expansion nail outer surface front side are equipped with the protruding, and the outer surface of protruding all matches the inner wall of installation groove and installs, and sliding ring slidingly connects in the middle part of the outer surface of expansion nail, and this special adjustable expansion nail plate system of humeral surgical neck fracture is equipped with fixed mechanism, can make the fixed net of the surface of expansion nail deformation through the adjustment, to strengthen the support and reset effect of fracture part, strengthen the stability of reset internal fixation, reduce the risk of fracture reset internal fixation loosening failure, can also through fixed assembly quick fixed and take out expansion nail, and then replace different bone graft block, to help fracture early stability and healing.

Description

Technical Field

[0001] This utility model relates to the field of internal fixation plates for proximal humeral fractures, specifically an adjustable expandable nail plate system for surgical neck fractures of the humerus. Background Technology

[0002] Proximal humeral fractures refer to fractures occurring at the proximal end of the humerus (near the shoulder joint), involving the bony structures above the surgical neck of the humerus, including the humeral head, greater tuberosity, lesser tuberosity, anatomical neck, and surgical neck. This type of fracture is often caused by direct trauma (such as impact or falls from height) or indirect trauma (such as the force transmitted through the hand when landing on one's hand during a fall), and is particularly common in elderly patients with osteoporosis. Current methods for treating proximal humeral fractures primarily involve internal fixation plates. These plates typically consist of a fixation plate and screws. During application, a guide and electric drill are used to insert the fixation plate at the appropriate position on the proximal humerus. Drilling at different angles and then inserting fixation screws into the drilled holes allows the screws to penetrate deep into the humerus at different angles, thereby achieving a fixation effect on the fracture site of the proximal humerus. Traditional internal fixation plates for proximal humeral fractures consist of only a single fixation plate and fixation screws, which are inconvenient for bone grafting and early stabilization and healing of the fracture site. For patients with severe osteoporosis, unstable fractures, and some anatomical neck fractures, a single fixation plate and fixation screws cannot provide efficient support and reduction for the fracture site, and are prone to the risk of fixation loosening and failure. Therefore, we propose an adjustable expandable screw-plate system specifically for humeral surgical neck fractures. Utility Model Content

[0003] The technical problem this invention aims to solve is to overcome existing defects and provide an adjustable expandable nail plate system specifically for fractures of the surgical neck of the humerus. This system features a fixation mechanism that allows for deformation of the fixation mesh on the surface of the expandable nails through adjustment, thereby strengthening the support and reduction of the fracture site, enhancing the stability of the internal fixation, reducing the risk of loosening and failure of the internal fixation, and enabling rapid fixation and removal of the expandable nails via the fixation components. This allows for the replacement of different bone grafts to aid in early stabilization and healing of the fracture site, effectively addressing the problems in the prior art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: an adjustable expandable nail plate system for humeral surgical neck fractures, including a fixation plate and a fixation mechanism; Fixed plate: It has a mounting groove in the middle of its interior; The fixation mechanism includes an expansion screw, a slip ring, a fixation mesh, a bone graft groove, and a fixation component. The expansion screw is located inside the mounting groove. Both ends of the front surface of the expansion screw have protrusions, and the outer surfaces of these protrusions mate with the inner wall of the mounting groove. The slip ring is slidably connected to the middle of the outer surface of the expansion screw. A fixation mesh is located between the rear end of the outer surface of the expansion screw and the rear end of the slip ring. The bone graft groove is located inside the rear side of the expansion screw, providing a foundation for internal reinforcement of the humerus and bone grafting. The fixation component is located inside the mounting groove and between the front end of the expansion screw. It has a fixation mechanism that allows the fixation mesh on the surface of the expansion screw to deform, thereby strengthening the support and reduction of the fracture site, enhancing the stability of the internal fixation, reducing the risk of loosening and failure of the internal fixation, and enabling rapid fixation and removal of the expansion screw to replace different bone grafts, thus aiding in early stabilization and healing of the fracture site.

[0005] Furthermore, the fixing component includes a slider, an adjusting screw, and a spring. The slider is slidably connected to the inside of the expansion nail, and the rear end of the slider is in contact with the front end of the slip ring. The adjusting screw is located inside the expansion nail, and the rear end of the outer surface of the adjusting screw is threadedly connected to the inside of the slider. A spring is provided between the rear side of the outer surface of the expansion nail and the rear end of the slip ring. The spring is sleeved on the rear side of the middle of the outer surface of the expansion nail. The unfolding state of the fixing net can be changed by adjusting the length of the adjusting screw embedded inside the slider.

[0006] Furthermore, the fixing component also includes a fixing groove and a fixing block. The fixing groove is located inside the front side of the mounting groove, and the fixing block is located at the front end of the adjusting screw. The outer surface of the fixing block is fitted with the inner wall of the fixing groove to provide a foundation for fixing the expansion nail.

[0007] Furthermore, the fixing component also includes a hexagonal hole, which is located at the center of the front end of the fixing block. The rotation angle of the fixing block can be changed by an external hexagonal wrench, thereby fixing and releasing the fixing block.

[0008] Furthermore, the fixing component also includes slots that are evenly spaced at the front end of the expansion pins. External tweezers can be inserted into the slots to change the rotation angle of the expansion pins, thereby fixing and releasing the expansion pins.

[0009] Furthermore, the fixing mechanism also includes a fixing cover, which is threaded to the rear end of the expansion nail. The rear end of the fixing cover has a cross hole, and the fixing cover can be installed and removed by thread, which facilitates the placement of the bone graft.

[0010] Furthermore, it also includes mounting hole one and mounting hole two. Mounting hole one is located at the upper inner end of the fixation plate, and mounting hole two is located at the middle of the lower inner end of the fixation plate. Fixing screws are provided inside mounting hole one and mounting hole two, providing a basis for fixing the proximal humerus.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows: This adjustable expandable nail plate system for humeral surgical neck fractures has the following advantages: 1. By rotating the adjusting screw, the position of the adjusting screw embedded in the slider is changed, thereby changing the distance between the rear end of the fixation block and the front end of the expansion nail. This changes the stroke of the fixation block when fixing the expansion nail, thus changing the state of the fixation net to suit different patients. This strengthens the support and reduction of the fracture site, enhances the stability of the internal fixation, and reduces the risk of loosening and failure of the internal fixation for fracture reduction.

[0012] 2. By rotating the slot and hexagonal hole, the angle between the protrusion and the fixing block can be changed. With the help of the spring's own elasticity, the expansion nail can be limited in front and behind and left and right. This is used to quickly fix the expansion nail. The expansion nail can also be quickly pulled out by changing the angle between the protrusion and the fixing block, which is convenient for replacing new bone grafts. This allows for the regular replacement of bone grafts to help stabilize and heal the fracture site in the early stages. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a cross-sectional structural diagram of the fixing mechanism of this utility model; Figure 3 This is a schematic diagram of the fixing block structure of this utility model; Figure 4 This is an exploded view of the fixing mechanism of this utility model; Figure 5 This is a schematic diagram of the mounting groove and fixing groove structure of this utility model.

[0014] In the diagram: 1. Fixing plate, 2. Mounting slot, 3. Fixing mechanism, 31. Expansion nail, 32. Slip ring, 33. Fixing mesh, 34. Bone grafting slot, 35. Fixing assembly, 351. Slider, 352. Adjusting screw, 353. Spring, 354. Fixing slot, 355. Fixing block, 356. Hexagonal hole, 357. Slot, 36. Fixing cover, 4. Mounting hole one, 5. Mounting hole two, 6. Fixing screw. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0016] Please see Figure 1-5This embodiment provides a technical solution: an adjustable expandable nail plate system for humeral surgical neck fractures, including a fixation plate 1 and a fixation mechanism 3; Fixed plate 1: It has an installation groove 2 in the middle of its interior, and the front side of the installation groove 2 is a sliding groove; Fixation mechanism 3 includes an expansion nail 31, a slip ring 32, a fixation mesh 33, a bone graft groove 34, and a fixation assembly 35. The expansion nail 31 is disposed inside the mounting groove 2. Both the upper and lower ends of the front surface of the expansion nail 31 have protrusions, and the outer surfaces of these protrusions are fitted into the inner wall of the mounting groove 2, slidingly connected to it. The slip ring 32 is slidably connected to the middle of the outer surface of the expansion nail 31. A fixation mesh 33, made of highly resilient metal, is located between the rear end of the outer surface of the expansion nail 31 and the rear end of the slip ring 32. The bone graft groove 34 is located inside the rear side of the expansion nail 31. The inner wall of the bone graft groove 34 has evenly distributed holes for cell delivery, providing a foundation for internal reinforcement and bone grafting of the humerus. The fixation assembly... The fixing component 35 is disposed inside the mounting groove 2 and between the front end of the expansion pin 31. The fixing component 35 includes a slider 351, an adjusting screw 352, and a spring 353. The slider 351 is slidably connected to the inside center of the expansion pin 31. A cross groove is formed inside the center of the expansion pin 31. The outer surface of the slider 351 is slidably connected to the inner wall of the cross groove. The rear end of the slider 351 is fitted against the front end of the slip ring 32. The adjusting screw 352 is disposed inside the center of the expansion pin 31. The rear end of the outer surface of the adjusting screw 352 is threadedly connected to the inside center of the slider 351. A bellows can be provided between the front end of the slider 351 and the front side wall of the cross groove. The bellows is sleeved on the outside of the front end of the adjusting screw 352. The bellows can extend and retract as the slider 351 moves. To protect the adjusting screw 352 from external environmental influences, a spring 353 is provided between the rear side of the outer surface of the expansion pin 31 and the rear end of the slip ring 32. The spring 353 is sleeved on the rear side of the middle of the outer surface of the expansion pin 31. The unfolding state of the fixing net 33 can be changed by adjusting the length of the adjusting screw 352 embedded in the slider 351. The fixing assembly 35 also includes a fixing groove 354 and a fixing block 355. The fixing groove 354 is located inside the front side of the mounting groove 2. A slot is opened at the front end of the fixing groove 354. The fixing block 355 is located at the front end of the adjusting screw 352. The slot is used to limit the fixing block 355. The outer surface of the fixing block 355 is fitted with the inner wall of the fixing groove 354. The outer surface of the fixing block 355 is slidably connected to the inner wall of the fixing groove 354. The groove allows the protrusion and fixing block 355 to slide in and out through the base, providing a foundation for fixing the expansion nail 31. The fixing assembly 35 also includes a hexagonal hole 356, which is located at the center of the front end of the fixing block 355. The rotation angle of the fixing block 355 can be changed by an external hexagonal wrench, thereby fixing and releasing the fixing block 355. The fixing assembly 35 also includes slots 357, which are evenly distributed at the front end of the expansion nail 31. The rotation angle of the expansion nail 31 can be changed by inserting external tweezers into the slots 357, thereby fixing and releasing the expansion nail 31. The fixing mechanism 3 also includes a fixing cover 36, which is threaded to the rear end of the expansion nail 31. The rear end of the fixing cover 36 has a cross hole, which can be installed and removed by thread.To facilitate the placement of bone grafts, mounting holes 4 and 5 are included. Mounting holes 4 are located at the upper inner end of the fixation plate 1, and mounting holes 5 are located at the lower middle inner end of the fixation plate 1. Both mounting holes 4 and 5 contain fixing screws 6. Before installation, pre-drilled holes at different angles can be made in the humerus using an external guide to allow for screw insertion at different angles, providing a basis for fixation of the proximal humerus. A fixation mechanism 3 is provided, which can deform the fixation mesh 33 on the surface of the expansion screw 31 through adjustment, thereby strengthening the support and reduction of the fracture site, enhancing the stability of the internal fixation, reducing the risk of loosening and failure of the internal fixation, and allowing for quick fixation and removal of the expansion screw 31 via the fixation component 35, facilitating the replacement of different bone grafts to aid in early fracture stabilization and healing.

[0017] The working principle of the adjustable expansion plate system for humeral surgical neck fractures provided by this utility model is as follows: When using the adjustable expansion plate system for humeral surgical neck fractures, first, the fixation plate 1 is fitted to the bone surface at the fracture site. Then, an external guide of appropriate angle is selected and fixed to the surface of the fixation plate 1. The guide hole of the external guide is adapted to the mounting groove 2, mounting hole 4, and mounting hole 5 on the fixation plate 1. Using an external electric drill, holes are drilled at different angles at the fracture site through the guide of the external guide to form pre-drilled holes. Then, the fixation screws 6 are passed through the corresponding guide holes in sequence, and then screwed into the pre-drilled holes with an external screwdriver to form a fixation effect on the proximal humerus of the patient. In order to enhance the fixation effect, the actual... Adjust the deformation state of the fixation net 33 by rotating the adjusting screw 352. When the adjusting screw 352 rotates clockwise, the slider 351 remains stationary. The adjusting screw 352 slowly screws into the slider 351, reducing the distance between the rear end of the fixing block 355 and the front end of the expansion nail 31. When the adjusting screw 352 rotates counterclockwise, the slider 351 remains stationary. The adjusting screw 352 slowly screws out of the slider 351, increasing the distance between the rear end of the fixing block 355 and the front end of the expansion nail 31. Once the adjusting screw 352 has moved to the appropriate position, the adjustment of the fixation net 33 is complete. To aid in early stability and healing of the fracture, a bone graft needs to be inserted into the bone graft groove 34. Reverse the fixation cover 36, unscrew it, insert the bone graft into the bone graft groove 34, and then replace the fixation cover. Tighten 36, then align the protrusion on the expansion pin 31 with the mounting groove 2 and insert it into the pre-drilled hole corresponding to the mounting groove 2. When the rear end of the protrusion contacts the rear side wall of the mounting groove 2, use the tip of external tweezers to insert into any two corresponding slots 357 and rotate the expansion pin 31 ninety degrees to misalign the protrusion with the sliding groove at the front end of the mounting groove 2. At this time, the mounting groove 2 forms a front and rear limiting effect on the expansion pin 31, and the friction between the protrusion and the mounting groove 2 also makes the expansion pin 31 easily loosen left and right. Then, insert the external hex wrench into the hexagonal hole 356, rotate the fixing block 355, align the fixing block 355 with the sliding groove at the front end of the mounting groove 2, and push the fixing block 355 backward. As the fixing block 355 moves, adjust the screw 3. 52 drives slider 351 to move backward, and the rear end of slider 351 presses against slip ring 32, causing slip ring 32 to move backward synchronously. Spring 353 is compressed, and the distance between slider 351 and the rear end of the outer surface of expansion nail 31 also decreases. The middle part of fixing net 33 is compressed and deforms outward, causing fixing net 33 to expand outward and press against the inner wall of the patient's humerus, forming an efficient support and reduction effect on the inner wall of the patient's humerus. At this time, through the previous adjustment, fixing block 355 is just vertically adjacent to fixing groove 354. Rotating the external hexagonal wrench causes fixing block 355 to rotate 90 degrees, so that fixing block 355 is longitudinally adjacent to the slot at the front end of fixing groove 354. Then, the external hexagonal wrench is retracted. Due to the elastic deformation of spring 353,The slip ring 32, slider 351, adjusting screw 352, and fixing block 355 will move forward due to the elastic deformation of spring 353 until the front end of fixing block 355 is tightly fitted against the front side wall of the slot at the front end of fixing groove 354. At this time, fixing block 355 will not wobble left or right due to the limitation of the slot. Combined with the elastic force of spring 353 and the friction between slider 351 and adjusting screw 352, it forms a left and right limiting effect on expansion nail 31, completing the fixing of adjusting screw 352. When it is necessary to remove expansion nail 31 to replace a new bone graft, insert external hex wrench into hexagonal hole 356, push fixing block 355 backward while rotating external hexagonal wrench, until fixing block 355 is completely removed from the slot and fixing groove. When the vertical joints of 354 and 355 are adjacent, the fixing block 355 can rotate freely without being restricted by the slot until it is longitudinally adjacent to the sliding groove at the front end of the mounting slot 2. At this point, the fixing block 355 is unrestricted. After retracting the external hex wrench, the spring 353 pushes the slip ring 32 forward by its own elastic deformation until the fixing net 33 is in a flat state and the fixing block 355 extends beyond the expansion pin 31. Then, the tip of the external tweezers is inserted into the slot 357, and the expansion pin 31 is rotated so that the protrusion is longitudinally adjacent to the sliding groove at the front end of the mounting slot 2. Then, the fixing block 355 is pinched and pulled forward to remove the expansion pin 31. After replacing the bone graft as described above, it is inserted into the patient's humerus to complete the periodic replacement of the bone graft.

[0018] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. An adjustable expandable screed system for fractures of the surgical neck of the humerus, characterized in that: It includes a fixing plate (1) and a fixing mechanism (3); Fixing plate (1): It has an installation groove (2) in the middle of its interior; Fixation mechanism (3): It includes expansion nail (31), slip ring (32), fixation mesh (33), bone graft groove (34) and fixation component (35). The expansion nail (31) is located inside the mounting groove (2). The upper and lower ends of the front surface of the expansion nail (31) are provided with protrusions. The outer surfaces of the protrusions are fitted with the inner wall of the mounting groove (2). The slip ring (32) is slidably connected to the middle of the outer surface of the expansion nail (31). The fixation mesh (33) is provided between the rear end of the outer surface of the expansion nail (31) and the rear end of the slip ring (32). The bone graft groove (34) is opened inside the rear side of the expansion nail (31). The fixation component (35) is located inside the mounting groove (2) and between the front end of the expansion nail (31).

2. The adjustable expandable screed system for humeral surgical neck fractures according to claim 1, characterized in that: The fixing component (35) includes a slider (351), an adjusting screw (352), and a spring (353). The slider (351) is slidably connected to the middle of the expansion nail (31). The rear end of the slider (351) is in contact with the front end of the slip ring (32). The adjusting screw (352) is located in the middle of the expansion nail (31). The rear end of the outer surface of the adjusting screw (352) is threadedly connected to the middle of the inner surface of the slider (351). A spring (353) is provided between the rear side of the outer surface of the expansion nail (31) and the rear end of the slip ring (32). The spring (353) is sleeved on the rear side of the middle of the outer surface of the expansion nail (31).

3. The adjustable expandable screed system for humeral surgical neck fractures according to claim 1, characterized in that: The fixing component (35) further includes a fixing groove (354) and a fixing block (355). The fixing groove (354) is located on the front side inside the mounting groove (2), and the fixing block (355) is located at the front end of the adjusting screw (352). The outer surface of the fixing block (355) is fitted with the inner wall of the fixing groove (354) for installation.

4. The adjustable expandable screed system for humeral surgical neck fractures according to claim 3, characterized in that: The fixing component (35) also includes a hexagonal hole (356) located at the center of the front end of the fixing block (355).

5. The adjustable expandable screed system for humeral surgical neck fractures according to claim 1, characterized in that: The fixing component (35) also includes slots (357) which are evenly distributed at the front end of the expansion pin (31).

6. The adjustable expandable screed system for humeral surgical neck fractures according to claim 1, characterized in that: The fixing mechanism (3) also includes a fixing cover (36), which is threaded to the rear end of the expansion nail (31), and the rear end of the fixing cover (36) has a cross hole.

7. The adjustable expandable screed system for humeral surgical neck fractures according to claim 1, characterized in that: It also includes mounting hole one (4) and mounting hole two (5). Mounting hole one (4) is opened at the upper inside of the fixing plate (1), and mounting hole two (5) is set at the middle of the lower inside of the fixing plate (1). Fixing screws (6) are provided inside mounting hole one (4) and mounting hole two (5).

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