Proximal tibia telescopic integral bone taking and grafting device

Abstract

The invention provides a proximal tibia telescopic integral bone taking and grafting device, and belongs to the technical field of medical instruments. Comprising a handle, a conveying pipe is slidably connected into the handle, a funnel is fixedly connected to the outer wall of the conveying pipe, and a first annular sliding groove is formed in the inner wall of the end, close to the handle, of the conveying pipe; and the bone grafting assembly is used for assisting medical staff to perform bone grafting on the collapsed tibial plateau of the patient, and the bone grafting assembly is connected with the handle, the conveying pipe and the first annular sliding groove. By arranging the bone grafting assembly, the jacking area of a tibial plateau can be increased by matching deformation of a first connecting rod and a second connecting rod with a jacking piece, and meanwhile, a gap generated by deformation of the first connecting rod and the second connecting rod is matched with a discharging groove, so that a bone tunnel can be filled with filler conveyed by an auger from multiple directions; the jacked tibial plateau is preliminarily fixed, and it is avoided that when a subsequent bone grafting device is separated from a bone tunnel, the tibial plateau sinks and collapses, and resetting of the tibial plateau is affected.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and in particular to a retractable integral bone harvesting and grafting device for the proximal tibia. Background Technology

[0002] Tibial plateau fractures require bone grafting. During the grafting process, a bone tunnel (fenestration) needs to be created in the bone cortex. A mandrel is then inserted into the tunnel to lift and reduce the articular surface of the tibial plateau, creating space for the graft. Afterward, the mandrel is removed, and the necessary filler (such as bone tissue or synthetic bone substitute) is placed into the tunnel. The need to remove the mandrel before grafting can easily lead to tibial plateau subsidence. Existing techniques over-lift (overcorrect) the tibial plateau to provide space for subsidence, but this often results in the plateau remaining over-lifted after subsidence, or insufficient lifting distance leading to collapse after subsidence. This makes accurate control of tibial plateau reduction impossible. Therefore, this invention provides a retractable, integral bone harvesting and grafting device for the proximal tibia to meet this need. Summary of the Invention

[0003] The technical problem to be solved by this invention is to provide a retractable integral bone graft device for the proximal tibia. By setting up a bone graft component, the deformation of the first and second connecting rods, in conjunction with the top member, can increase the lifting area of ​​the tibial plateau. At the same time, the gaps created by the deformation of the first and second connecting rods, in conjunction with the discharge groove, can fill the filler transported by the auger into the bone tunnel from multiple directions, thus initially fixing the lifted tibial plateau and preventing the tibial plateau from sinking and collapsing when the bone graft device is removed from the bone tunnel, which would affect the repositioning of the tibial plateau. Through the above settings, the problem of tibial plateau sinking and collapsing after the top rod is removed in the prior art can be solved.

[0004] To solve the above-mentioned technical problems, the present invention provides the following technical solution:

[0005] A retractable proximal tibial bone harvesting and grafting device includes a handle, a delivery tube slidably connected inside the handle, a funnel fixedly connected to the outer wall of the delivery tube, and a first annular groove formed on the inner wall of the end of the delivery tube near the handle; and a bone grafting assembly, which is used to assist medical personnel in performing bone grafting on tibial plateau collapse in patients, and the bone grafting assembly is connected to the handle, the delivery tube, and the first annular groove.

[0006] Optionally, the bone graft assembly includes an elastic clip that is slidably connected inside the first annular groove, and one end of the elastic clip is fixedly connected to a threaded component.

[0007] Optionally, the threaded component is threadedly connected inside the handle, and the threaded component is located at one end of the delivery tube near the handle.

[0008] Optionally, the threaded component has a second annular groove, a third annular groove, and a spiral groove inside, with the spiral groove located between the second annular groove and the third annular groove.

[0009] Optionally, the semicircular plate passes through and is slidably inserted into the interior of the conveying pipe and the threaded component. A locking block is fixedly connected to the outer wall of the semicircular plate near the conveying pipe, and a sliding groove is provided inside the semicircular plate.

[0010] Optionally, a connecting rod is inserted into the interior of the semicircular plate, and a slider is fixedly connected to the outer wall of the connecting rod. The slider is slidably connected inside the second annular groove, the third annular groove, the spiral groove, and the groove.

[0011] Optionally, a knob is fixedly connected to one end of the connecting rod, the semicircular plate is slidably connected inside the knob, and a pull block is fixedly connected to the end of the semicircular plate near the knob, the pull block being located at the end of the knob away from the conveying pipe.

[0012] Optionally, a stop block is fixedly connected to the end of the connecting rod away from the knob, an auger is fixedly connected to the end of the stop block away from the connecting rod, and a sleeve is fixedly connected to the end of the auger away from the stop block. The outer diameters of the stop block, auger, and sleeve match the inner diameter of the conveying pipe.

[0013] Optionally, a hinge ring is rotatably connected to the outer wall of the sleeve at the end away from the auger. The hinge ring is slidably connected inside the conveying pipe. Multiple first connecting rods are hinged to the outer wall of the hinge ring, and a second connecting rod is hinged to the end of each of the multiple first connecting rods at the end away from the hinge ring.

[0014] Optionally, a top member is fixedly connected to the end of the conveying pipe away from the handle, and multiple second connecting rods are hinged to the outer wall of the top member, and a discharge trough is provided inside the top member.

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

[0016] In the above scheme, by setting up the bone graft component, the lifting area of ​​the tibial plateau can be increased after the deformation of the first and second connecting rods and the top piece, so as to avoid the tibial plateau collapse area being too large and the tibial plateau being incompletely lifted. At the same time, the gap generated by the deformation of the first and second connecting rods, together with the discharge groove, can fill the filler conveyed by the auger into the bone tunnel from multiple directions, and initially fix the lifted tibial plateau, so as to prevent the tibial plateau from sinking and collapsing when the bone graft device is removed from the bone tunnel, which would affect the repositioning of the tibial plateau.

[0017] By setting up a semi-circular plate, a locking block, an elastic locking element, and a threaded component, the semi-circular plate, locking block, elastic locking element, and threaded component cooperate with each other. After the knob is turned, the threaded component can push the delivery tube relative to the handle through the threaded advance, allowing the delivery tube to push the top component to lift and reset the collapsed tibial plateau. Because the threaded advance is stable, compared with medical staff pushing the device by hand to lift the collapsed tibial plateau, the lifting accuracy of the collapsed tibial plateau is high, avoiding the situation where medical staff lift too much force and the collapsed tibial plateau is lifted too much. Attached Figure Description

[0018] The accompanying drawings, which are incorporated herein and form part of the specification, illustrate embodiments of the invention and, together with the specification, further serve to explain the principles of the invention and enable those skilled in the art to practice and use the invention.

[0019] Figure 1 A three-dimensional structural diagram of a retractable integral bone harvesting and grafting device for the proximal tibia.

[0020] Figure 2 A sectional three-dimensional structural diagram of a retractable proximal tibia bone harvesting and grafting device.

[0021] Figure 3 for Figure 2 Enlarged 3D structural diagram of part A;

[0022] Figure 4 for Figure 2 Enlarged 3D structural diagram of part B;

[0023] Figure 5 A schematic diagram of an explosive structure for a retractable, integral bone harvesting and grafting device for the proximal tibia.

[0024] Figure 6 for Figure 5 A magnified three-dimensional structural diagram of part C.

[0025] Figure label:

[0026] 1. Handle; 2. Conveying pipe; 3. Funnel; 4. First annular groove; 5. Elastic clamp; 6. Threaded part; 7. Second annular groove; 8. Third annular groove; 9. Spiral groove; 10. Semicircular plate; 11. Clamping block; 12. Groove; 13. Connecting rod; 14. Sliding block; 15. Knob; 16. Pull block; 17. Stop block; 18. Screw; 19. Sleeve; 20. Hinge ring; 21. First connecting rod; 22. Second connecting rod; 23. Top piece; 24. Discharge chute.

[0027] As shown in the figure, specific structures and devices are marked in the figure to clearly illustrate the structure of the embodiments of the present invention. However, this is only for illustrative purposes and is not intended to limit the present invention to this specific structure, device and environment. Those skilled in the art can adjust or modify these devices and environments according to specific needs. Detailed Implementation

[0028] The following is a detailed description of a retractable integral bone harvesting and grafting device for the proximal tibia provided by the present invention, with reference to the accompanying drawings and specific embodiments. It should be noted that, to make the embodiments more detailed, the following embodiments are the best and preferred embodiments; those skilled in the art can also use other alternative methods to implement some known technologies; and the accompanying drawings are only for more specific description of the embodiments and are not intended to specifically limit the present invention.

[0029] It should be noted that the use of terms such as "an embodiment," "an embodiment," "an exemplary embodiment," and "some embodiments" in the specification indicates that the described embodiment may include a specific feature, structure, or characteristic, but not every embodiment necessarily includes that specific feature, structure, or characteristic. Furthermore, when a specific feature, structure, or characteristic is described in connection with an embodiment, implementing such a feature, structure, or characteristic in conjunction with other embodiments (whether explicitly described or not) should be within the knowledge of those skilled in the art.

[0030] Generally, terms can be understood at least partly from their use in context. For example, depending at least partly on the context, the term "one or more" as used herein can be used to describe any feature, structure, or characteristic in a singular sense, or a combination of features, structures, or characteristics in a plural sense. Additionally, the term "based on" can be understood not necessarily to convey an exclusive set of factors, but rather, alternatively, depending at least partly on the context, to allow for the presence of other factors that are not necessarily explicitly described.

[0031] It is understood that the meanings of “on”, “above”, and “above” in this invention should be interpreted in the broadest manner, such that “on” means not only “directly on” something, but also includes the meaning of being “on” something with an intervening feature or layer, and that “above” or “above” means not only “on” something, but also includes the meaning of being “on” something without an intervening feature or layer.

[0032] Furthermore, spatially related terms such as “below,” “under,” “lower,” “above,” and “upper” are used herein for convenience to describe the relationship of one element or feature to one or more other elements or features, as illustrated in the accompanying drawings. Spatially related terms are intended to cover different orientations in the use or operation of the device other than those depicted in the accompanying drawings. The device may be oriented in other ways, and the spatially related descriptive terms used herein can be interpreted similarly.

[0033] like Figure 1 and Figure 3 As shown, an embodiment of the present invention provides a retractable proximal tibial bone harvesting and grafting device, including a handle 1, a delivery tube 2 slidably connected inside the handle 1, a funnel 3 fixedly connected to the outer wall of the delivery tube 2, and a first annular groove 4 formed on the inner wall of the end of the delivery tube 2 near the handle 1; and a bone grafting component, which is used to assist medical personnel in performing bone grafting on tibial plateau collapse in patients. The bone grafting component is connected to the handle 1, the delivery tube 2, and the first annular groove 4. By setting the bone grafting component, the tibial plateau lifting area can be increased after the first connecting rod 21 and the second connecting rod 22 deform and cooperate with the top piece 23, so as to avoid the tibial plateau collapse area being too large and the tibial plateau being incompletely lifted. The gap generated by the deformation of the first connecting rod 21 and the second connecting rod 22 cooperates with the discharge groove 24. The filler delivered by the auger 18 can be inserted into the bone tunnel from multiple directions to initially fix the raised tibial plateau. This prevents the tibial plateau from sinking and collapsing when the bone graft device detaches from the bone tunnel, which would affect the repositioning of the tibial plateau. At the same time, the semi-circular plate 10, the locking block 11, the elastic locking element 5, and the threaded element 6 can cooperate with each other. After the knob 15 is turned, the threaded element 6 can push the delivery tube 2 relative to the handle 1 through the threaded advance. The delivery tube 2 pushes the top element 23 to lift and reposition the collapsed part of the tibial plateau. Because the threaded advance is stable, it has higher lifting accuracy than medical staff pushing the device by hand to lift the collapsed part of the tibial plateau. It avoids the situation where medical staff lift too much force and the collapsed part of the tibial plateau is lifted too much.

[0034] In this embodiment, as Figure 3As shown, the bone graft assembly includes an elastic clip 5 inserted into the first annular groove 4. One end of the elastic clip 5 is fixedly connected to a threaded part 6. The ends of the two elastic clips 5 away from the threaded part 6 are turned outward to form a trumpet-shaped profile. This ensures that when the elastic clip 5 is inserted into the delivery tube 2 and the first annular groove 4, sufficient friction is generated between the elastic clip 5 and the delivery tube 2, increasing the rotational resistance of the elastic clip 5 within the delivery tube 2 and the first annular groove 4. This prevents the threaded part 6 from rotating when not needed, thus affecting the use of the bone graft device. The threaded part 6 is threadedly connected to the inside of the handle 1. The threaded part 6 is located at the end of the delivery tube 2 near the handle 1. When medical personnel need to lift the collapsed tibial plateau of the patient, they first insert the delivery tube 2 into the surgically opened bone tunnel until the top part 23 at the end of the delivery tube 2 abuts against the collapsed tibial plateau. At this time, the medical personnel pull the pull block 16, causing the pull block 16 to pull the semicircular plate 10 away from the collapsing part. The device moves away from the top part 23, causing the locking block 11 on the semicircular plate 10 to move and engage between the two elastic locking parts 5. Then, the medical staff supports the handle 1 with one hand to keep it still, and rotates the knob 15 with the other hand. The knob 15 drives the semicircular plate 10 and the connecting rod 13 to rotate, which in turn causes the semicircular plate 10 to rotate through the locking block 11 engaged between the two elastic locking parts 5, causing the elastic locking parts 5 to rotate inside the first annular groove 4. The rotation of the elastic locking parts 5 drives the threaded part 6 to rotate. The threaded part 6 rotates and gradually enters the handle 1 through the thread, allowing the threaded part 6 to advance and push the delivery tube 2 to move relative to the handle 1. The delivery tube 2 drives the top part 23 to lift the collapsed tibial plateau. Because the threaded advance is stable, it has higher lifting accuracy than the medical staff pushing the device by hand to lift the collapsed tibial plateau, avoiding the situation where the medical staff lifts too much force and the collapsed tibial plateau is lifted too much.

[0035] In this embodiment, as Figures 2 to 6As shown, the threaded component 6 has a second annular groove 7, a third annular groove 8, and a spiral groove 9 inside. The spiral groove 9 is located between the second annular groove 7 and the third annular groove 8. A semicircular plate 10 passes through and is slidably inserted into the conveying pipe 2 and the threaded component 6. A locking block 11 is fixedly connected to the outer wall of the end of the semicircular plate 10 near the conveying pipe 2. A groove 12 is opened inside the semicircular plate 10. A connecting rod 13 is inserted into the semicircular plate 10. A slider 14 is fixedly connected to the outer wall of the connecting rod 13. The slider 14 is slidably connected inside the second annular groove 7, the third annular groove 8, the spiral groove 9, and the groove 12. A knob 15 is fixedly connected to one end of the connecting rod 13. The semicircular plate 10 is slidably connected inside the knob 15. A pull block 16 is fixedly connected to the end of the semicircular plate 10 near the knob 15. The pull block 16 is located away from the knob 15 from the conveying pipe. At one end of 2, a stop block 17 is fixedly connected to the end of the connecting rod 13 away from the knob 15. The stop block 17 is used to prevent the filler from moving to the position of the connecting rod 13. An auger 18 is fixedly connected to the end of the stop block 17 away from the connecting rod 13. A sleeve 19 is fixedly connected to the end of the auger 18 away from the stop block 17. The outer diameters of the stop block 17, the auger 18, and the sleeve 19 match the inner diameter of the conveying pipe 2. A hinge ring 20 is rotatably connected to the outer wall of the end of the sleeve 19 away from the auger 18. The hinge ring 20 is slidably connected inside the conveying pipe 2. Multiple first connecting rods 21 are hinged to the outer wall of the hinge ring 20. A second connecting rod 22 is hinged to the end of the multiple first connecting rods 21 away from the hinge ring 20. A top member 23 is fixedly connected to the end of the conveying pipe 2 away from the handle 1. Multiple second connecting rods 22 are hinged to the outer wall of the top member 23. A discharge chute 24 is opened inside the top member 23.

[0036] When the tibial plateau collapses excessively, medical personnel rotate knob 15 and apply a force towards handle 1. This causes knob 15 to rotate, driving connecting rod 13. The slider 14 on connecting rod 13 then slides from the third annular groove 8 into the spiral groove 9. This rotation of connecting rod 13 causes slider 14 to slide along spiral groove 9. During this process, connecting rod 13 moves towards top member 23, pushing hinge ring 20 along the inside of delivery pipe 2 towards top member 23 via stop 17, auger 18, and sleeve 19. This hinges the hinge ring 20 and top member 23 together. The first connecting rod 21 and the second connecting rod 22 rotate and deform until the second connecting rod 22 rotates and deforms 90 degrees and becomes parallel to the end face of the top piece 23. At this time, the slider 14 disengages from the inside of the spiral groove 9 and slides into the inside of the second annular groove 7. The medical staff stops rotating the knob 15. The parallel alignment of the second connecting rod 22 with the end face of the top piece 23 forms a support structure, allowing the top piece 23 and the second connecting rod 22 to increase the lifting area of ​​the collapsed tibial plateau. This prevents the area of ​​the collapsed tibial plateau from being larger than the bone tunnel opened during surgery, which would result in insufficient lifting area of ​​the collapsed tibial plateau and affect the lifting and repositioning effect of the collapsed tibial plateau.

[0037] Furthermore, after the medical staff have lifted the tibial plateau, they place the filling material into the funnel 3 and rotate the knob 15. This causes the knob 15 to rotate the connecting rod 13, which in turn causes the connecting rod 13 to rotate the auger 18 via the stop block 17. The auger 18 then transports the filling material inside the funnel 3 to the delivery pipe 2 near the top piece 23. At this time, the discharge chute 24, in conjunction with the strip-shaped gap created by the deformation of the first connecting rod 21 and the second connecting rod 22, fills the filling material inside the delivery pipe 2 into the bone tunnel, thus lifting and repositioning the tibial plateau. Initial support is provided to prevent the tibial plateau from collapsing and sinking after the device is removed from the bone tunnel, which would affect the outcome of the tibial plateau surgery. After the bone tunnel is filled, the medical staff applies a force away from the handle 1 when turning knob 15, causing the slider 14 on the connecting rod 13 driven by knob 15 to slide back into the spiral groove 9 from inside the second annular groove 7. This continues until the slider 14 slides back into the third annular groove 8 along the spiral groove 9, at which point the connecting rod 13 passes through the stop 17, auger 18, and sleeve 1. 9. Pulling the hinge ring 20 to slide and reset it, which in turn pulls the first connecting rod 21 and the second connecting rod 22 to reset, allowing the first connecting rod 21 and the second connecting rod 22 to squeeze the filler and reset, so that the delivery tube 2 can be removed from the inside of the bone tunnel to avoid jamming. At the same time, because the spiral groove 9 and the auger 18 are set in opposite directions, when the connecting rod 13 is reset by sliding spiral movement inside the spiral groove 9 through the slider 14, the auger 18, which is reset by spiral movement driven by the connecting rod 13 through the stop 17, will continue to deliver the filler, so that the space created by the auger 18 being pulled and reset can be cleared. The cavity is filled by the filling material transported by the auger 18 to avoid the formation of a cavity that would affect the filling of the bone tunnel. Finally, the medical staff pulls the delivery tube 2 from the inside of the bone tunnel by the handle 1 and continues to turn the knob 15 so that the filling material inside the delivery tube 2 continues to be discharged into the inside of the bone tunnel through the discharge trough 24 to fill the gap created by the delivery tube 2 leaving the bone tunnel. This continues until the delivery tube 2 drives the top piece 23 to leave the inside of the bone tunnel and the bone tunnel is filled. At this point, the filling of the bone tunnel is complete, and the filling material supports and fixes the repositioned tibial plateau.

[0038] The working principle of the technical solution provided by the present invention is as follows: First, medical staff use other surgical tools to create a bone tunnel, and then insert the delivery tube 2 into the surgically created bone tunnel until the top piece 23 at the end of the delivery tube 2 stops against the collapsed tibial plateau. At this time, the medical staff pulls the pull block 16, which drives the locking block 11 on the semicircular plate 10 to move and lock between the two elastic locking pieces 5. Then, the medical staff supports the handle 1 with one hand to keep the handle 1 still, and rotates the knob 15 with the other hand, which drives the semicircular plate 10 and the connecting rod 13 to rotate. This causes the semicircular plate 10 to rotate through the locking block 11 locked between the two elastic locking pieces 5, and drives the elastic locking pieces 5 to rotate inside the first annular groove 4. The rotation of the elastic locking pieces 5 drives the threaded piece 6 to rotate. The rotation of the threaded piece 6 gradually enters the interior of the handle 1 through the thread, allowing the threaded piece 6 to move the delivery tube 2 relative to the handle 1 through the thread. This allows the delivery tube 2 to drive the top piece 23 to lift and reset the collapsed tibial plateau.

[0039] After the tibial plateau is lifted and reduced, the medical staff put the filler into the funnel 3 and rotated the knob 15, which caused the connecting rod 13 to rotate. In turn, the connecting rod 13 rotated the auger 18 through the stop block 17, allowing the auger 18 to transport the filler inside the funnel 3 to the position of the delivery tube 2 near the top piece 23. The discharge trough 24 then filled the filler inside the delivery tube 2 into the bone tunnel, providing initial support for the lifted and reduced tibial plateau. This prevents the tibial plateau from losing support and collapsing after the device is removed from the bone tunnel, which would affect the outcome of the tibial plateau surgery. Finally, while pulling the delivery tube 2 out of the bone tunnel, the medical staff continued to rotate the knob 15, allowing the auger 18 to continuously fill the bone tunnel through the discharge trough 24 with filler, filling the space created by the delivery tube 2 leaving the bone tunnel. This process continued until the bone tunnel was completely filled, at which point the bone grafting was completed. The medical staff then proceeded with the subsequent treatment of the patient's wound and fixation of the tibia.

[0040] This invention encompasses any substitutions, modifications, equivalent methods, and solutions made within the spirit and scope of this invention. To provide the public with a thorough understanding of this invention, specific details are described in detail in the following preferred embodiments; however, those skilled in the art will fully understand the invention even without these details. Furthermore, to avoid unnecessary misunderstanding of the essence of this invention, well-known methods, processes, procedures, components, and circuits are not described in detail.

[0041] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A retractable integral bone harvesting and grafting device for the proximal tibia, comprising a handle, characterized in that, The handle is slidably connected to a conveying pipe, and a funnel is fixedly connected to the outer wall of the conveying pipe. A first annular groove is provided on the inner wall of the end of the conveying pipe near the handle. A bone grafting assembly is used to assist medical personnel in performing bone grafting on a patient with tibial plateau collapse. The bone grafting assembly is connected to the handle, the delivery tube, and the first annular groove.

2. The retractable integral bone harvesting and grafting device for the proximal tibia according to claim 1, characterized in that, The bone graft assembly includes an elastic clip that is slidably connected inside a first annular groove, and one end of the elastic clip is fixedly connected to a threaded component.

3. The retractable proximal tibia bone harvesting and grafting device according to claim 2, characterized in that, The threaded component is threadedly connected inside the handle, and the threaded component is located at one end of the delivery tube near the handle.

4. The retractable proximal tibia bone harvesting and grafting device according to claim 2, characterized in that, The threaded component has a second annular groove, a third annular groove, and a spiral groove inside, with the spiral groove located between the second annular groove and the third annular groove.

5. The retractable integral bone harvesting and grafting device for the proximal tibia according to claim 2, characterized in that, The semicircular plate passes through and slides into the interior of the conveying pipe and the threaded component. A locking block is fixedly connected to the outer wall of the end of the semicircular plate near the conveying pipe, and a sliding groove is opened inside the semicircular plate.

6. The retractable integral bone harvesting and grafting device for the proximal tibia according to claim 5, characterized in that, A connecting rod is inserted into the interior of the semicircular plate, and a slider is fixedly connected to the outer wall of the connecting rod. The slider is slidably connected inside the second annular groove, the third annular groove, the spiral groove, and the groove.

7. The retractable integral bone harvesting and grafting device for the proximal tibia according to claim 6, characterized in that, A knob is fixedly connected to one end of the connecting rod, and the semicircular plate is slidably connected inside the knob. A pull block is fixedly connected to the end of the semicircular plate near the knob, and the pull block is located at the end of the knob away from the conveying pipe.

8. The retractable integral bone harvesting and grafting device for the proximal tibia according to claim 7, characterized in that, A stop block is fixedly connected to the end of the connecting rod away from the knob, an auger is fixedly connected to the end of the stop block away from the connecting rod, and a sleeve is fixedly connected to the end of the auger away from the stop block. The outer diameters of the stop block, auger, and sleeve match the inner diameter of the conveying pipe.

9. The retractable integral bone harvesting and grafting device for the proximal tibia according to claim 8, characterized in that, The outer wall of the sleeve away from the auger is rotatably connected to a hinge ring, which is slidably connected inside the conveying pipe. Multiple first connecting rods are hinged to the outer wall of the hinge ring, and a second connecting rod is hinged to the end of each of the multiple first connecting rods away from the hinge ring.

10. The retractable integral bone harvesting and grafting device for the proximal tibia according to claim 9, characterized in that, The end of the conveying pipe away from the handle is fixedly connected to a top component, and multiple second connecting rods are hinged to the outer wall of the top component. The top component has a discharge trough inside.

Images