Syringe for bone repair material

Abstract

The utility model relates to the technical field of bone repair, and discloses an injector for bone repair materials, which comprises a shell, a sealing cover, an outer plunger and an inner plunger, the sealing cover is mounted at one end of the shell, the outer plunger is mounted inside the shell, and a filling cavity is formed between the outer plunger and the inner plunger; the outer plunger comprises a containing pipe, a piston and a first pressing block, one end of the piston is connected to one end of the containing pipe, the containing pipe and the first pressing block are integrally formed and connected, and the containing pipe and the piston are both connected to the interior of the shell; the inner plunger comprises a moving rod, a release ring groove is formed in the surface of the moving rod, and one end of the moving rod penetrates through the piston and extends into the shell. According to the injector for the bone repair material, the shell, the outer plunger and the inner plunger are arranged, a solid component is placed in the shell, a liquid component is placed in a filling cavity between the outer plunger and the inner plunger, the solid component and the liquid component can be packaged at the same time, the two materials can be evenly mixed and injected, and operation is convenient.

Description

Technical Field

[0001] This utility model relates to the field of bone repair technology, specifically to a syringe for bone repair materials. Background Technology

[0002] In the field of bone repair, especially in the filling and repair of small bone defects in dentistry and other fields, the ideal bone repair materials should be injectable or malleable, which facilitates surgical procedures and ensures complete filling of the defect. Currently, injectable or malleable bone filling and repair materials used in clinical practice include paste-like artificial bone and putty-like artificial bone. These two types of bone repair materials generally consist of two components: bone powder particles with osteogenic induction properties and a carrier matrix with binding properties. The two components are mixed before being used to fill bone defects.

[0003] If solid particles and carrier matrix are mixed before packaging during product manufacturing, the material will fail too quickly because the carrier matrix may accelerate the degradation of the solid particles. Therefore, mixing the two components before surgical use is the proper way to ensure the product's effectiveness. Easy-graft packages bone meal granules and liquid activator in separate containers. Before use, the activator must be added to the syringe containing bone meal granules, the plunger must be moved to mix the two components, and then the mixture is filled into the defective area. The operation is rather cumbersome. Utility Model Content

[0004] To address the shortcomings of existing technologies, this invention provides a syringe for bone repair materials, which solves the problems mentioned in the background.

[0005] This utility model provides the following technical solution: a syringe for bone repair materials, comprising: a shell, a sealing cap, an outer plunger and an inner plunger, wherein the sealing cap is installed at one end of the shell, the outer plunger is installed inside the shell, and a filling cavity is formed between the outer plunger and the inner plunger;

[0006] The outer plunger includes a receiving tube, a piston, and a first pressing block. One end of the piston is connected to one end of the receiving tube. The receiving tube and the first pressing block are integrally formed and connected, and both the receiving tube and the piston are connected inside the outer shell.

[0007] The inner plunger includes a movable rod with a release annular groove on its surface. One end of the movable rod passes through the piston and extends into the interior of the housing, while the other end passes through the first pressing block and extends into the exterior of the outer plunger.

[0008] Preferably, one end of the outer shell is provided with a first external thread, the other end of the outer shell is provided with a second pressing block, and the inner wall of the sealing cover is provided with a first internal thread, which engages with the first external thread.

[0009] Preferably, the surface of the movable rod is provided with a second external thread and a third external thread, the inner wall of the piston is provided with a second internal thread, the inner wall of the first pressing block is provided with a third internal thread, the second external thread of the movable rod engages with the second internal thread of the piston, and the third external thread of the movable rod engages with the third internal thread of the first pressing block.

[0010] Preferably, a stirring blade is installed at one end of the moving rod that extends into the housing.

[0011] Preferably, a gripping part is connected and installed at one end of the moving rod that extends to the outside of the outer plunger.

[0012] Preferably, the outer surface of the sealing cover is provided with multiple anti-slip grooves.

[0013] Preferably, a first sealing gasket and a second sealing gasket are respectively installed on the surface of the movable rod.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. The syringe for this bone repair material has a shell, an outer plunger, and an inner plunger. The solid component is placed inside the shell, and the liquid component is placed in the filling cavity between the outer and inner plungers. It can simultaneously package the solid and liquid components, and can mix and inject the two materials, making it easy to operate.

[0016] 2. The syringe used for this bone repair material is equipped with a stirring blade. The stirring blade's function is to agitate the contents of the outer shell during the rotation and back-and-forth movement of the inner plunger, so that the solid and liquid components are mixed evenly. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0018] Figure 2 This is a side sectional view of the present invention.

[0019] Figure 3 This is a schematic diagram of the outer shell and sealing cap structure of this utility model;

[0020] Figure 4 This is a schematic diagram of the outer plunger structure of this utility model;

[0021] Figure 5 This is a schematic diagram of the internal plunger structure of this utility model.

[0022] In the diagram: 1. Outer shell; 2. Sealing cap; 3. Outer plunger; 31. Receiving tube; 32. Piston; 33. First pressing block; 4. Inner plunger; 41. Moving rod; 42. Release ring groove; 5. First external thread; 6. Second pressing block; 7. First internal thread; 8. Second external thread; 9. Third external thread; 10. Second internal thread; 11. Third internal thread; 12. Stirring blade; 13. Grip part; 14. Anti-slip groove; 15. First sealing gasket; 16. Second sealing gasket. Detailed Implementation

[0023] 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.

[0024] Please see Figure 1-5 A syringe for bone repair materials includes: a shell 1, a sealing cap 2, an outer plunger 3, and an inner plunger 4. The sealing cap 2 is installed at one end of the shell 1, and the outer plunger 3 is installed inside the shell 1, forming a filling cavity between the outer plunger 3 and the inner plunger 4. The outer plunger 3 includes a receiving tube 31, a piston 32, and a first pressing block 33. One end of the piston 32 is connected to one end of the receiving tube 31, and the receiving tube 31 and the first pressing block 33 are integrally formed and connected. Both the receiving tube 31 and the piston 32 are connected inside the shell 1. The inner plunger 4 includes a moving rod 41. The surface of the moving rod 41 is provided with a release ring groove 42. One end of the moving rod 41 passes through the piston 32 and extends into the interior of the shell 1, and the other end of the moving rod 41 passes through the first pressing block 33 and extends to the outside of the outer plunger 3. The moving rod 41 moves toward one end of the sealing cap 2 until the release ring groove 42 is located inside the piston 32, so that the liquid in the filling cavity can flow to the solid component inside the shell 1.

[0025] One end of the outer casing 1 is provided with a first external thread 5, and the other end of the outer casing 1 is provided with a second pressing block 6. The inner wall of the sealing cover 2 is provided with a first internal thread 7, which engages with the first external thread 5. The sealing cover 2, the outer plunger 3, and the moving rod 41 are all made of existing inert plastics, such as PP plastic (polypropylene) or PE plastic (polyethylene). The outer casing 1 is made of existing inert materials, such as glass, PP plastic (polypropylene) or PE plastic (polyethylene).

[0026] The surface of the moving rod 41 is provided with a second external thread 8 and a third external thread 9, the inner wall of the piston 32 is provided with a second internal thread 10, and the inner wall of the first pressing block 33 is provided with a third internal thread 11. The second external thread 8 of the moving rod 41 engages with the second internal thread 10 of the piston 32, the third external thread 9 of the moving rod 41 engages with the third internal thread 11 of the first pressing block 33, the second external thread 8 of the moving rod 41 of the inner plunger 4 is threadedly matched with the second internal thread 10 of the piston 32, and the third external thread 99 of the moving rod 41 is threadedly matched with the third internal thread 1111 of the first pressing block 3333, which plays a sealing role and prevents the liquid components stored in the filling cavity from flowing out or being contaminated.

[0027] A stirring blade 12 is installed at one end of the moving rod 41 that extends into the interior of the outer casing 1.

[0028] The end of the moving rod 41 that extends to the outside of the outer plunger 3 is connected to a gripping part 13.

[0029] Multiple anti-slip grooves 14 are evenly distributed on the outside of the sealing cover 2.

[0030] In one specific embodiment, a first sealing gasket 15 and a second sealing gasket 16 are respectively installed on the surface of the moving rod 41. The first sealing gasket 15 is in close contact with the bottom of the piston 32, and the second sealing gasket 16 is in close contact with the bottom of the first pressing block 33, to further seal and prevent the liquid components stored in the filling cavity from flowing out or being contaminated.

[0031] First, ensure the sealing cap 2 is tightly screwed onto the outer shell 1. Then, add the solid component to the outer shell 1, followed by the liquid component to the filling chamber. Gently push the outer plunger 3 forward until the piston 32 of the outer plunger 3 contacts but does not compress the solid component. To use, open the packaging, remove the syringe, and first pull the outer plunger 3 backward an appropriate distance. Then, rotate the inner plunger 4 forward so that the release ring groove 42 of both the inner and outer plungers 3 is located inside the piston 32. The liquid in the filling chamber flows into the outer shell 1. If the solid and liquid components have good compatibility, wait a few moments until they mix naturally. If the solid and liquid components do not mix well, wait until they are naturally homogenized. If the components are incompatible, the inner plunger 4 can be used to mix them. Specifically, the moving rod 41 is slowly rotated, moving it back and forth within the outer casing 1. The stirring blades agitate the contents of the syringe during the rotation and movement of the inner plunger 4, ensuring a uniform mixture of solid and liquid components. The inner plunger 4 is then pulled out, and once its tip is no longer in contact with the material, it is rotated several times to remove as much material as possible. The inner plunger 4 is then moved backward until the second external thread 8 of the moving rod 41 engages with the second internal thread 10 of the piston 32. Finally, the plunger is pushed forward to inject the material into the bone defect area.

[0032] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0033] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A syringe for bone repair materials, characterized in that, include: The outer shell (1), sealing cap (2), outer plunger (3) and inner plunger (4) are provided. The sealing cap (2) is installed at one end of the outer shell (1), and the outer plunger (3) is installed inside the outer shell (1). A filling cavity is formed between the outer plunger (3) and the inner plunger (4). The outer plunger (3) includes a receiving tube (31), a piston (32) and a first pressing block (33). One end of the piston (32) is connected to one end of the receiving tube (31). The receiving tube (31) and the first pressing block (33) are integrally formed and connected. Both the receiving tube (31) and the piston (32) are connected inside the outer shell (1). The inner plunger (4) includes a moving rod (41) with a release annular groove (42) on its surface. One end of the moving rod (41) passes through the piston (32) and extends into the interior of the housing (1), while the other end of the moving rod (41) passes through the first pressing block (33) and extends into the exterior of the outer plunger (3).

2. The syringe for bone repair material according to claim 1, characterized in that, One end of the outer shell (1) is provided with a first external thread (5), and the other end of the outer shell (1) is provided with a second pressing block (6). The inner wall of the sealing cover (2) is provided with a first internal thread (7), and the first internal thread (7) engages with the first external thread (5).

3. The syringe for bone repair material according to claim 1, characterized in that, The surface of the moving rod (41) is provided with a second external thread (8) and a third external thread (9), the inner wall of the piston (32) is provided with a second internal thread (10), the inner wall of the first pressing block (33) is provided with a third internal thread (11), the second external thread (8) of the moving rod (41) meshes with the second internal thread (10) of the piston (32), and the third external thread (9) of the moving rod (41) meshes with the third internal thread (11) of the first pressing block (33).

4. The syringe for bone repair material according to claim 1, characterized in that, The moving rod (41) is fitted with a stirring blade (12) at one end extending into the housing (1).

5. The syringe for bone repair material according to claim 1, characterized in that, The moving rod (41) extends to one end of the outer plunger (3) and is connected to a grip (13).

6. The syringe for bone repair material according to claim 1, characterized in that, The sealing cover (2) has multiple anti-slip grooves (14) evenly arranged on its exterior.

7. The syringe for bone repair material according to claim 1, characterized in that, The surface of the movable rod (41) is respectively equipped with a first sealing gasket (15) and a second sealing gasket (16).

Images