An adjustable glenoid bone grafting guide structure

Abstract

The utility model discloses an adjustable glenoid bone grafting guide structure, which aims to provide an adjustable glenoid bone grafting guide structure capable of adjusting the angle between a positioning rod and a Kirschner wire according to the inclination of the bottom end of the glenoid. It comprises an upper conduit and a lower conduit, a conduit seat 1 and a conduit seat 2 are arranged between the upper conduit and the lower conduit, the conduit seat 2 is placed on the side of the conduit seat 1, the upper conduit is mounted on the upper end of the conduit seat 1, the lower conduit and the lower end of the conduit seat 1 are rotatably connected, the upper conduit is mounted on the upper end of the conduit seat 2, the lower conduit and the conduit seat 2 are movably connected, an angle adjustment device connected to the lower conduit is arranged on the conduit seat 2, a guide needle is arranged in the upper conduit, the guide needle and the upper conduit are plugged in, a Kirschner wire is arranged in the lower conduit, the Kirschner wire and the lower conduit are plugged in. The beneficial effects of the utility model are: the angle between the positioning rod and the Kirschner wire can be adjusted according to the inclination of the bottom end of the glenoid, thereby improving the scope of application; and the structural stability is high.

Description

Technical Field

[0001] The utility model relates to the technical field related to medical devices, in particular to an adjustable glenoid bone grafting guide structure. Background Art

[0002] In medicine, bone grafts are needed to repair the normal contour of the glenoid. The fixation of the bone graft and the glenoid requires the establishment of a glenoid bone tunnel. Currently, the operation of establishing a bone tunnel has the following main problems: the glenoid bone tunnel is often blocked by the soft tissue in the joint cavity; the operation of establishing a bone tunnel consumes a lot of surgical time; the establishment of a bone tunnel is subjective and blind, and the bone tunnel often penetrates the joint surface, leading to the occurrence of traumatic arthritis.

[0003] Chinese patent authorization announcement number: CN210871878U, authorization announcement date 2020.06.30, discloses a shoulder glenoid bone grafting guide, including a positioning sleeve, a guide sleeve, and a handle. The positioning sleeve and the guide sleeve are located on the same plane, and the distance between the positioning sleeve and the guide sleeve gradually decreases from left to right. A rear fixing block is connected between the positioning sleeve and the guide sleeve, and the handle is fixedly connected to the rear fixing block. A positioning rod is inserted in the positioning sleeve, and the length of the positioning rod is greater than the length of the positioning sleeve. The length of the positioning sleeve is greater than the length of the guide sleeve, and a cavity is arranged in the guide sleeve along its length direction. The shortcoming of the above patent is that, although the distance between the positioning sleeve and the guide sleeve gradually decreases from left to right, so that the positioning rod and the Kirschner wire can form a certain angle, which can adapt to the inclination of the bottom end of the glenoid, but because the angle between the positioning rod and the Kirschner wire is fixed and unique, when establishing a bone tunnel for the bottom end of the glenoid with different inclinations, it is impossible to make adaptive angle adjustments according to different inclinations, and the scope of application is small.

[0004] In summary, there is a need for an adjustable glenoid bone grafting guide structure that can adjust the angle between the positioning rod and the Kirschner wire according to the inclination of the bottom end of the glenoid. Utility Model Content

[0005] The utility model aims to overcome the shortcomings of the prior art in which the angle between the positioning rod and the Kirschner wire is fixed and unique, and when establishing a bone tunnel for the glenoid cavity with different inclinations, it is impossible to make adaptive angle adjustments according to the different inclinations, and the scope of application is small. The utility model provides an adjustable glenoid bone grafting guide structure that can adjust the angle between the positioning rod and the Kirschner wire according to the inclination of the glenoid cavity bottom.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] An adjustable glenoid bone grafting guide structure comprises an upper catheter and a lower catheter, wherein a catheter seat 1 and a catheter seat 2 are arranged between the upper catheter and the lower catheter, the catheter seat 2 is placed on the side of the catheter seat 1, the upper catheter is mounted on the upper end of the catheter seat 1, the lower catheter is rotatably connected to the lower end of the catheter seat 1, the upper catheter is mounted on the upper end of the catheter seat 2, the lower catheter is movably connected to the catheter seat 2, an angle adjustment device connected to the lower catheter is arranged on the catheter seat 2, a guide needle is arranged in the upper catheter, and the guide needle is plugged into the upper catheter.

[0008] The lower catheter is used for inserting the Kirschner wire. When in use, the doctor inserts the guide needle into the upper catheter and passes through the upper catheter, and then passes one end of the guide needle through the upper catheter and presses it against the glenoid joint surface (there is friction between the outer wall of the guide needle and the inner wall of the upper catheter, so that the guide needle and the upper catheter can be relatively fixed), and then the doctor rotates and adjusts the lower catheter according to the inclination of the bottom end of the glenoid through the angle adjustment device, adjusts the angle between the upper catheter and the lower catheter, thereby adjusting the angle between the guide needle and the Kirschner wire so that it can adapt to the inclination of the bottom end of the glenoid, and finally presses the end of the lower catheter against the bone surface of the bottom end of the glenoid, and then places the Kirschner wire in the lower catheter, and drills a bone tunnel in the glenoid, thereby realizing accurate positioning of the bone tunnel. The utility model can adjust the angle between the positioning rod and the Kirschner wire according to the inclination of the bottom end of the glenoid, thereby improving the scope of application.

[0009] Preferably, the catheter seat 1 is located between the middle position of the upper catheter and the middle position of the lower catheter, the upper end of the catheter seat 1 is provided with a mounting hole 1, the middle part of the upper catheter is installed in the mounting hole 1, the lower end of the catheter seat 1 is provided with a movable cavity 1, the middle position of the lower catheter is fixed with a lower catheter arm, the lower catheter arm is installed in the movable cavity 1 and is rotatably connected thereto, the catheter seat 2 is located between the left end position of the upper catheter and the left end position of the lower catheter, the upper end of the catheter seat 2 is provided with a mounting hole 2, the left end of the upper catheter is installed in the mounting hole 2, the lower end of the catheter seat 2 is provided with an movable cavity 2, the left end of the lower catheter is placed in the movable cavity 2 and is movably connected thereto up and down. When installing the upper conduit, the conduit seat 1 is plugged into the upper conduit through the mounting hole 1 and the conduit seat 1 is moved to the middle position of the upper conduit, and the conduit seat 2 is plugged into the upper conduit through the mounting hole 2 and the conduit seat 2 is moved to the left end position of the upper conduit (there is friction between the outer wall of the upper conduit and the inner wall of the mounting hole 1, and between the outer wall of the upper conduit and the inner wall of the mounting hole 2, so that the upper conduit and the conduit seat 1, and between the upper conduit and the conduit seat 2 can be relatively fixed); when installing the lower conduit, the lower conduit arm of the lower conduit is installed in the active cavity 1, and the lower conduit arm and the conduit seat 1 are hinged to each other, and then the left end of the lower conduit is placed in the active cavity 2 and connected to the angle adjustment device. After the assembly of the utility model is completed, the structural stability is high, and the connection method is simple and easy to operate, which is convenient for installation and disassembly, and reduces the difficulty of later maintenance and repair.

[0010] Preferably, the lower side wall of the movable chamber 2 is provided with an adjusting screw hole, and the adjusting screw hole is placed below the lower conduit. The angle adjustment device includes an adjusting screw that matches the adjusting screw hole, and the adjusting screw is threadedly connected to the adjusting screw hole, and the end of the adjusting screw is in contact with the lower conduit. The lower conduit arm in the middle of the lower conduit is hinged to the conduit seat 1. During adjustment, the adjusting screw is rotated, and the rotational motion of the adjusting screw is converted into up and down movement through the threaded guiding action between the adjusting screw and the adjusting screw hole. Since the end of the adjusting screw is placed below the left end of the lower conduit, the adjusting screw will also push the left end of the lower conduit to move up and down synchronously when moving up and down, thereby realizing the angle adjustment between the upper conduit and the lower conduit.

[0011] Preferably, the end of the adjusting screw is in an arc shape. The arc-shaped design reduces the contact area between the end of the adjusting screw and the surface of the lower conduit, reduces the friction resistance between the two, makes the operation easier and more convenient, and reduces the wear between the adjusting screw and the lower conduit.

[0012] Preferably, the surface of the catheter seat 2 is provided with an adjustment scale, the adjustment scale is located outside the active cavity 2, and the surface of the lower catheter is provided with a pointer corresponding to the adjustment scale. Through the design of the pointer and the adjustment scale, the doctor can more intuitively understand the rotation angle of the lower catheter, so as to perform precise rotation operation on the lower catheter and improve the working accuracy.

[0013] Preferably, a torsion spring is installed inside the movable chamber 2, and the torsion spring is placed above the lower conduit and the two are in contact with each other. The left end of the lower conduit is pressed against the end of the adjusting screw under the elastic force of the torsion spring, thereby improving the tightness of the connection between the lower conduit and the adjusting screw, so that the left end of the lower conduit can better follow the adjusting screw to move up and down.

[0014] Preferably, the second mounting hole is connected to the second movable chamber, the torsion spring is placed between the upper conduit and the lower conduit, one end of the torsion spring is in contact with the upper conduit, and the other end of the torsion spring is in contact with the lower conduit. One end of the torsion spring presses the lower conduit against the end of the adjusting screw, thereby improving the tightness of the connection between the lower conduit and the adjusting screw; the other end of the torsion spring presses the upper conduit against the side wall of the second mounting hole, thereby improving the relative fixing effect between the upper conduit and the second conduit seat.

[0015] Preferably, a locking plate is fixed at the left end of the lower conduit, the locking plate is placed inside the second movable chamber, a locking screw hole is provided on the side wall of the second movable chamber, the locking screw hole is placed on the side of the locking plate, a locking screw is connected to the inner thread of the locking screw hole, and the end of the locking screw faces the locking plate. After the angle of the lower conduit is adjusted, the locking screw is tightened so that the locking screw presses the locking plate against the inner wall of the second movable chamber, thereby locking the position of the lower conduit and improving the structural stability.

[0016] Preferably, the end of the locking screw is in a planar shape, and the locking piece is provided with anti-slip teeth on the side facing the locking screw. The planar design increases the contact area between the end of the adjusting screw and the surface of the lower catheter, and combined with the anti-slip teeth design on the locking piece, the friction resistance between the two is greatly increased, the structural stability is improved, and the position displacement of the locking piece and the lower catheter during the operation is well avoided.

[0017] Preferably, the catheter seat 2 is provided with a handle, and the end of the handle is provided with a connecting groove, the catheter seat 2 and the connecting groove are plugged, and the side wall of the connecting groove is provided with a connecting screw hole, and the connecting screw hole is placed on the outside of the locking screw hole, and the locking screw and the connecting screw hole are threadedly connected. The design of the handle makes it convenient for doctors to take it. When installing the handle, align the locking screw hole of the catheter seat 2 with the connecting screw hole on the connecting groove, and then plug the two together (there is friction between the outer wall of the catheter seat 2 and the inner wall of the connecting groove, so that the catheter seat 2 and the handle can be relatively fixed), and then screw the locking screw into the connecting screw hole and the locking screw hole in turn. The connection method is simple and easy to operate, convenient for installation and disassembly, and reduces the difficulty of later maintenance and repair.

[0018] The beneficial effects of the utility model are: the angle between the positioning rod and the Kirschner wire can be adjusted according to the inclination of the bottom end of the glenoid cavity, thereby improving the scope of application; the structure has high stability; the connection method is simple and easy to operate, convenient for installation and disassembly, and reduces the difficulty of later maintenance and repair; the operation is easy and convenient; the working accuracy is improved; and the fixing effect is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a three-dimensional diagram of the utility model;

[0020] Figure 2 It is the front view of the utility model;

[0021] Figure 3 It is a left view of the utility model;

[0022] Figure 4 yes Figure 2 Sectional view at AA in the middle;

[0023] Figure 5 yes Figure 2 Sectional view at the middle BB;

[0024] Figure 6 yes Figure 3 Cross-sectional view at CC.

[0025] In the figure: 1. upper catheter, 3. catheter seat 1, 4. catheter seat 2, 5. guide needle, 6. lower catheter, 7. mounting hole 1, 8. movable cavity 1, 9. lower catheter arm, 10. mounting hole 2, 11. movable cavity 2, 12. adjusting screw hole, 13. adjusting screw, 14. torsion spring, 15. locking plate, 16. locking screw hole, 17. locking screw, 18. anti-slip teeth, 19. handle, 20. connecting groove, 21. connecting screw hole. DETAILED DESCRIPTION

[0026] The utility model is further described below in conjunction with the accompanying drawings and specific implementation methods.

[0027] like Figure 1 In the described embodiment, an adjustable glenoid bone grafting guide structure includes an upper catheter 1 and a lower catheter 6, a catheter seat 1 3 and a catheter seat 2 4 are provided between the upper catheter 1 and the lower catheter 6, the catheter seat 2 4 is placed on the side of the catheter seat 1 3, the upper catheter 1 is installed at the upper end of the catheter seat 1 3, the lower catheter 6 is rotatably connected to the lower end of the catheter seat 3, the upper catheter 1 is installed at the upper end of the catheter seat 2 4, the lower catheter 6 is movably connected to the catheter seat 2 4, an angle adjustment device connected to the lower catheter 6 is provided on the catheter seat 2 4, a guide needle 5 is provided in the upper catheter 1, the guide needle 5 is plugged into the upper catheter 1, a Kirschner wire is provided in the lower catheter 6, and the Kirschner wire is plugged into the lower catheter 6.

[0028] like Figure 2 , Figure 4 and Figure 5 As shown, the catheter seat 13 is located between the middle position of the upper catheter 1 and the middle position of the lower catheter 6, the upper end of the catheter seat 13 is provided with a mounting hole 17, the middle part of the upper catheter 1 is installed in the mounting hole 17, the lower end of the catheter seat 13 is provided with an active cavity 18, the middle position of the lower catheter 6 is fixed with a lower catheter arm 9, the lower catheter arm 9 is installed in the active cavity 18 and is rotatably connected thereto, the catheter seat 24 is located between the left end position of the upper catheter 1 and the left end position of the lower catheter 6, the upper end of the catheter seat 24 is provided with a mounting hole 210, the left end of the upper catheter 1 is installed in the mounting hole 210, the lower end of the catheter seat 24 is provided with an active cavity 211, the left end of the lower catheter 6 is placed in the active cavity 211 and is movably connected thereto up and down.

[0029] like Figure 3 and Figure 6 As shown, the lower side wall of the movable chamber 11 is provided with an adjusting screw hole 12, and the adjusting screw hole 12 is placed below the lower guide tube 6. The angle adjustment device includes an adjusting screw 13 matching the adjusting screw hole 12. The adjusting screw 13 and the adjusting screw hole 12 are threadedly connected, and the end of the adjusting screw 13 and the lower guide tube 6 are in contact with each other.

[0030] The end of the adjusting screw 13 is in an arc shape.

[0031] like Figure 2 and Figure 4 As shown, the surface of the catheter seat 4 is provided with an adjustment scale, the adjustment scale is located outside the active cavity 11, and the surface of the lower catheter 6 is provided with a pointer corresponding to the adjustment scale.

[0032] A torsion spring 14 is installed inside the second movable chamber 11 . The torsion spring 14 is placed above the lower guide tube 6 and the two are in contact with each other.

[0033] The second mounting hole 10 is connected to the second active cavity 11 , and the torsion spring 14 is placed between the upper conduit 1 and the lower conduit 6 . One end of the torsion spring 14 contacts the upper conduit 1 , and the other end of the torsion spring 14 contacts the lower conduit 6 .

[0034] A locking plate 15 is fixed at the left end of the lower conduit 6, and the locking plate 15 is placed on the inner side of the movable chamber 2 11. A locking screw hole 16 is provided on the side wall of the movable chamber 2 11, and the locking screw hole 16 is placed on the side of the locking plate 15. A locking screw 17 is connected to the inner thread of the locking screw hole 16, and the end of the locking screw is opposite to the locking plate 15.

[0035] The end of the locking screw 17 is in a planar shape, and anti-slip teeth 18 are provided on a surface of the locking piece 15 facing the locking screw 17 .

[0036] A handle 19 is provided on the catheter seat 24, and a connecting groove 20 is provided at the end of the handle 19. The catheter seat 24 and the connecting groove 20 are plugged into each other. A connecting screw hole 21 is provided on the side wall of the connecting groove 20. The connecting screw hole 21 is placed on the outside of the locking screw hole 16, and the locking screw 17 and the connecting screw hole 21 are threadedly connected.

[0037] When installing the upper conduit 1, plug the conduit seat 13 into the upper conduit 1 through the mounting hole 17 and move the conduit seat 13 to the middle position of the upper conduit 1, plug the conduit seat 24 into the upper conduit 1 through the mounting hole 210 and move the conduit seat 24 to the left end position of the upper conduit 1 (there is friction between the outer wall of the upper conduit 1 and the inner wall of the mounting hole 17, and between the outer wall of the upper conduit 1 and the inner wall of the mounting hole 210, so that the upper conduit 1 and the conduit seat 13, and between the upper conduit 1 and the conduit seat 24 can be relatively fixed); when installing the lower conduit 6, the lower conduit arm of the lower conduit 6 is moved to the lower conduit 1. 9 is installed in the movable cavity 8, and the lower catheter arm 9 and the catheter seat 3 are hinged to each other, and then the left end of the lower catheter 6 is placed in the movable cavity 2 11 and placed above the end of the adjusting screw 13; when installing the handle 19, the locking screw hole 16 of the catheter seat 2 4 is aligned with the connecting screw hole 21 on the connecting groove 20, and then the two are plugged in (there is friction between the outer wall of the catheter seat 2 4 and the inner wall of the connecting groove 20, so that the catheter seat 2 4 and the handle 19 can be relatively fixed), and then the locking screw 17 is screwed into the connecting screw hole 21 and the locking screw hole 16 in turn.

[0038] When in use, the doctor inserts the guide needle 5 from the left end of the upper catheter 1 and passes it through the right end of the upper catheter 1, and then puts the end of the guide needle 5 that passes through the upper catheter 1 close to the glenoid joint surface (there is friction between the outer wall of the guide needle 5 and the inner wall of the upper catheter 1, so that the guide needle 5 and the upper catheter 1 can be relatively fixed). Then the doctor rotates the adjustment screw 13 according to the inclination of the bottom end of the glenoid, and the rotational movement of the adjustment screw 13 is converted into up and down movement through the threaded guide effect between the adjustment screw 13 and the adjustment screw hole 12. Since the end of the adjustment screw 13 is placed below the left end of the lower catheter 6, the adjustment screw 13 When moving up and down, the left end of the lower catheter 6 will also be pushed to move up and down synchronously, so as to adjust the angle between the upper catheter 1 and the lower catheter 6, thereby completing the angle adjustment between the guide pin 5 and the Kirschner wire, so that it can adapt to the inclination of the bottom end of the glenoid. After the angle adjustment of the lower catheter 6 is completed, the locking screw 16 is tightened so that the locking screw 16 presses the locking plate 15 against the inner wall of the active cavity 2 11, so that the position of the lower catheter 6 can be locked. Finally, the right end of the lower catheter 6 is pressed against the bone surface of the bottom end of the glenoid, and then the Kirschner wire is placed in the lower catheter 6 to drill a bone tunnel in the glenoid.

Claims

1. An adjustable glenoid bone grafting guide structure, characterized in that: The invention comprises an upper catheter (1) and a lower catheter (6), wherein a catheter seat 1 (3) and a catheter seat 2 (4) are arranged between the upper catheter (1) and the lower catheter (6), wherein the catheter seat 2 (4) is arranged on the side of the catheter seat 1 (3), wherein the upper catheter (1) is mounted on the upper end of the catheter seat 1 (3), wherein the lower catheter (6) and the lower end of the catheter seat 1 (3) are rotatably connected, wherein the upper catheter (1) is mounted on the upper end of the catheter seat 2 (4), wherein the lower catheter (6) and the catheter seat 2 (4) are movably connected, wherein an angle adjustment device connected to the lower catheter (6) is arranged on the catheter seat 2 (4), wherein a guide needle (5) is arranged in the upper catheter (1), wherein the guide needle (5) and the upper catheter (1) are plugged.

2. The adjustable glenoid bone grafting guide structure according to claim 1, characterized in that: The catheter seat 1 (3) is located between the middle position of the upper catheter (1) and the middle position of the lower catheter (6); the upper end of the catheter seat 1 (3) is provided with a mounting hole 1 (7); the middle part of the upper catheter (1) is mounted in the mounting hole 1 (7); the lower end of the catheter seat 1 (3) is provided with a movable cavity 1 (8); a lower catheter arm (9) is fixed at the middle position of the lower catheter (6); the lower catheter arm (9) is mounted in the movable cavity 1 (8) and is rotatably connected thereto; the catheter seat 2 (4) is located between the left end position of the upper catheter (1) and the left end position of the lower catheter (6); the upper end of the catheter seat 2 (4) is provided with a mounting hole 2 (10); the left end of the upper catheter (1) is mounted in the mounting hole 2 (10); the lower end of the catheter seat 2 (4) is provided with a movable cavity 2 (11); the left end of the lower catheter (6) is placed in the movable cavity 2 (11) and is movably connected thereto up and down.

3. The adjustable glenoid bone grafting guide structure according to claim 2, characterized in that: An adjusting screw hole (12) is provided on the lower side wall of the movable chamber 2 (11), and the adjusting screw hole (12) is placed below the lower guide tube (6). The angle adjustment device comprises an adjusting screw (13) matching the adjusting screw hole (12), and the adjusting screw (13) and the adjusting screw hole (12) are threadedly connected, and an end of the adjusting screw (13) and the lower guide tube (6) are in contact with each other.

4. The adjustable glenoid bone grafting guide structure according to claim 3, characterized in that: The end of the adjusting screw (13) is in the shape of an arc.

5. The adjustable glenoid bone grafting guide structure according to claim 3, characterized in that: The surface of the second catheter seat (4) is provided with an adjustment scale, the adjustment scale is located outside the second active cavity (11), and the surface of the lower catheter (6) is provided with a pointer corresponding to the adjustment scale.

6. An adjustable glenoid bone grafting guide structure according to any one of claims 3 to 5, characterized in that: A torsion spring (14) is installed inside the second movable chamber (11), and the torsion spring (14) is placed above the lower guide tube (6) and the two are in contact with each other.

7. The adjustable glenoid bone grafting guide structure according to claim 6, characterized in that: The second mounting hole (10) is connected to the second active cavity (11); the torsion spring (14) is disposed between the upper conduit (1) and the lower conduit (6); one end of the torsion spring (14) is in contact with the upper conduit (1); and the other end of the torsion spring (14) is in contact with the lower conduit (6).

8. An adjustable glenoid bone grafting guide structure according to any one of claims 2 to 5, characterized in that: A locking plate (15) is fixed at the left end of the lower guide tube (6), and the locking plate (15) is placed on the inner side of the movable chamber (11). A locking screw hole (16) is provided on the side wall of the movable chamber (11), and the locking screw hole (16) is placed on the side of the locking plate (15). A locking screw (17) is connected to the inner thread of the locking screw hole (16), and the end of the locking screw (17) is directly opposite to the locking plate (15).

9. The adjustable glenoid bone grafting guide structure according to claim 8, characterized in that: The end of the locking screw (17) is in the shape of a plane, and anti-slip teeth (18) are provided on a surface of the locking piece (15) facing the locking screw (17).

10. The adjustable glenoid bone grafting guide structure according to claim 8, characterized in that: The catheter seat 2 (4) is provided with a handle (19), the end of the handle (19) is provided with a connecting groove (20), the catheter seat 2 (4) and the connecting groove (20) are plugged together, a connecting screw hole (21) is provided on the side wall of the connecting groove (20), the connecting screw hole (21) is arranged outside the locking screw hole (16), and the locking screw (17) and the connecting screw hole (21) are threadedly connected.

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