Bone cement nail and bone setting assembly

Abstract

The utility model provides a bone cement nail and a bone setting assembly, and relates to the technical field of medical instruments, the bone cement nail provided by the utility model comprises a nail rod, a screw rod, a screw rod and a screw rod, the top surface of the head end of the nail rod is provided with a sinking table which is sunken towards the tail end of the nail rod; an inlet communicated with the hollow pipeline is formed in the bottom surface of the sinking table; first connecting structures and second connecting structures which are alternately arranged one by one are arranged on the circumferential inner wall of the sinking table, the first connecting structures are used for being connected with a screwing tool so that the screwing tool can drive the bone cement nail to rotate, and the second connecting structures are used for being detachably connected with a liquid injection tool.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, in particular to a bone cement nail and a bone setting component. Background Art

[0002] Bone cement screws are often used in orthopedic surgery to symptomatically treat osteoporosis patients. Bone cement is injected into the screws, allowing the bone cement to diffuse into the vertebral cancellous bone through the side holes of the screws, thereby increasing the screw's holding force.

[0003] When the screw is connected to the bone, a tightening tool is needed to cooperate with the screw and drive the screw into the bone. Then, a bone cement injection tool is used to dock with the entrance at the top of the screw to inject bone cement. In the two processes, the screw needs to be docked with the tightening tool and the bone cement injection tool respectively. The two existing docking structures are relatively scattered and difficult to process. Utility Model Content

[0004] The utility model aims to provide a bone cement nail and a bone fixation assembly to alleviate the technical problem that the butt joint structure at the end of the existing bone cement nail is dispersed, resulting in troublesome processing.

[0005] In a first aspect, the utility model provides a bone cement nail, comprising: a nail rod, wherein the nail rod has a hollow tube inside;

[0006] The top surface of the head end of the nail rod has a sinking platform that is recessed toward the tail end of the nail rod; the bottom surface of the sinking platform has an inlet that is connected to the hollow pipe;

[0007] The circumferential inner wall of the sink has first connecting structures and second connecting structures which are alternately arranged one by one. The first connecting structure is used to connect with a tightening tool so that the tightening tool can drive the bone cement nail to rotate, and the second connecting structure is used to be detachably connected with an injection tool.

[0008] Furthermore, the first connection structure includes an outer flange, and the outer flange protrudes away from the center of the sinking platform.

[0009] Furthermore, the second connection structure includes an inner flange, the inner flange protrudes toward the center of the sink; the inner flange is provided with a threaded section on the surface facing the center, and all the threaded sections on the inner flange form a screw hole, and the screw hole is used for threaded connection with the injection tool;

[0010] The inlet is located on the inner side of the projection of the screw hole toward the bottom surface of the sink platform.

[0011] Furthermore, a sealing ring is provided between the projection and the inlet.

[0012] Furthermore, the outlet of the bone cement nail is located between the middle position and the tail end thereof.

[0013] Furthermore, the outlet of the bone cement nail is located between its middle position and the head end.

[0014] Furthermore, the outlet of the bone cement nail is arranged in a spiral shape around the axis of the bone cement nail.

[0015] Furthermore, the number of the outlets of the bone cement nail is at least two, and at least two of the outlets are arranged at intervals along the length direction of the bone cement nail;

[0016] The bone cement nail comprises a plug, and the plug is used for selectively blocking the outlet.

[0017] Furthermore, the plug is threadably connected to the outlet.

[0018] In a second aspect, the utility model provides a bone fixation assembly, comprising the above-mentioned bone cement nail.

[0019] The utility model has at least the following advantages or beneficial effects:

[0020] The bone cement nail provided by the utility model comprises: a nail rod, wherein the nail rod has a hollow pipe inside; the top surface of the head end of the nail rod has a sinker recessed toward the tail end of the nail rod; the bottom surface of the sinker has an inlet connected to the hollow pipe; the circumferential inner wall of the sinker has a first connecting structure and a second connecting structure arranged alternately one by one, the first connecting structure is used to connect with a tightening tool so that the tightening tool can drive the bone cement nail to rotate, and the second connecting structure is used to be detachably connected to an injection tool.

[0021] Since the first connection structure and the second connection structure are both arranged in the same sink, the processing positions are concentrated, which makes processing and forming more convenient. In addition, both the tightening tool and the bone cement injection tool can be docked with the sink to avoid mis-insertion.

[0022] The bone setting assembly provided by the utility model includes the above-mentioned bone cement nail. Because the bone setting assembly provided by the utility model uses the above-mentioned bone cement nail, the bone setting assembly provided by the utility model also has the advantages of the bone cement nail. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 A schematic diagram of a bone cement nail provided by an embodiment of the utility model;

[0025] Figure 2 for Figure 1 A partial enlarged view of position A in the middle;

[0026] Figure 3 for Figure 1 Top view of the median cement nail;

[0027] Figure 4 A schematic diagram of another bone cement nail provided by an embodiment of the utility model;

[0028] Figure 5 A schematic diagram of another bone cement nail provided by an embodiment of the utility model;

[0029] Figure 6 A schematic diagram of another bone cement nail provided in an embodiment of the utility model.

[0030] Icon: 1-outlet; 2-external flange; 3-inner flange; 31-threaded section; 4-inlet; 5-plug. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0032] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0034] In the description of the present utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, or the orientation or position relationship in which the utility model product is usually placed when in use, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0035] In addition, the terms "horizontal", "vertical" and the like do not mean that the components are required to be absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0036] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0037] like Figure 1 - Figure 3 As shown, the bone cement nail provided by the utility model comprises: a nail rod, wherein the nail rod has a hollow tube inside, the head end of the nail rod has an inlet 4, and the side wall of the nail rod has an outlet 1, so that the bone cement can be injected into the patient's bone.

[0038] The top surface of the head end of the nail rod has a sinking platform that is recessed toward the tail end of the nail rod. The middle position of the bottom surface of the sinking platform has the inlet 4 that is connected to the hollow pipe.

[0039] The circumferential inner wall of the sink has a first connection structure and a second connection structure arranged alternately one by one. The first connection structure is used to connect with a tightening tool so that the tightening tool can drive the bone cement nail to rotate, and the second connection structure is used to be detachably connected with an injection tool. Since the first connection structure and the second connection structure are both arranged in the same sink, the processing position is concentrated, which is more convenient for processing and forming. In addition, both the tightening tool and the bone cement injection tool can be docked with the sink to avoid misinsertion.

[0040] In this embodiment, the first connection structure includes an outer flange 2, which protrudes away from the center of the sink. The second connection structure includes an inner flange 3, which protrudes toward the center of the sink; the inner flange 3 is provided with a threaded section 31 on the surface facing the center, and all the threaded sections 31 on the inner flange 3 form a screw hole, which is used for threaded connection with a liquid injection tool; the inlet 4 is located on the inner side of the projection of the screw hole toward the bottom surface of the sink.

[0041] like Figure 3 As shown, the outer flange 2 is roughly in the shape of a groove, and multiple outer flanges 2 are arranged at intervals, and the inner flange 3 is formed between two adjacent outer flanges 2, so that the shape of the entire sinking platform in the top view direction is roughly in the shape of a "plum blossom". In this embodiment, the number of outer flanges 2 is six, that is, the shape of the docking with the tightening tool is a hexagonal plum blossom hole. A threaded section 31 is provided on the inner flange 3. Although the multiple inner flanges 3 are discontinuous, the threads thereon are on the same circle, so they can surround a screw hole, which is larger than the inlet 4. After docking the injection tool, the bottom of the injection tool is in close contact with the bottom surface of the sinking platform, and the bone cement output from the interface will enter the inlet 4 as much as possible, which can reduce bone cement leakage.

[0042] Furthermore, in order to reduce leakage, a sealing ring is provided on the bottom surface of the sink table, thereby reducing the gap between the injection tool and the bottom surface of the sink table and improving the sealing performance.

[0043] In one possible implementation, Figure 1 As shown, the outlet 1 of the bone cement nail is located between the middle position and the tail end thereof, so that the bone cement injection position is closer to the inside of the humerus.

[0044] In another possible implementation, Figure 4 As shown, the outlet 1 of the bone cement nail is located between the middle position and the head end, so that the bone cement injection position is closer to the outer wall of the bone. According to the patient's condition, an appropriate bone cement nail is selected to better fill the bone cement.

[0045] In one possible implementation, Figure 5 As shown, the outlet 1 is arranged in a spiral shape around the axis of the bone cement nail. For patients with more severe osteoporosis, a bone cement nail with a radial spiral outlet 1 can be selected. When the bone cement is injected, the bone cement can be radially overflowed over a longer path. The bone cement is more evenly distributed to the osteoporotic area, thereby improving the holding force of the bone cement nail.

[0046] In one possible implementation, Figure 6As shown, the number of the outlets 1 is at least two, and at least two of the outlets 1 are spaced apart along the length direction of the bone cement nail; the bone cement nail includes a plug 5, and the plug 5 is used to selectively block the outlet 1.

[0047] Before the operation, the outlet 1 that is not needed can be blocked by the plug 5. The plug 5 and the outlet 1 can be threadedly connected, leaving only the required outlet 1 in an open state, so that the bone cement nail can adapt to different osteoporosis areas.

[0048] The bone setting assembly provided by the utility model includes the above-mentioned bone cement nail. Because the bone setting assembly provided by the utility model uses the above-mentioned bone cement nail, the bone setting assembly provided by the utility model also has the advantages of the bone cement nail.

[0049] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.

Claims

1. A bone cement nail, It is characterized in that include: A nail rod, wherein the nail rod has a hollow pipe inside; The top surface of the head end of the nail rod has a sink that is recessed toward the tail end of the nail rod; the bottom surface of the sink has an inlet (4) that is connected to the hollow pipe; The circumferential inner wall of the sink has first connecting structures and second connecting structures which are alternately arranged one by one. The first connecting structure is used to connect with a tightening tool so that the tightening tool can drive the bone cement nail to rotate, and the second connecting structure is used to be detachably connected with an injection tool.

2. The bone cement nail according to claim 1, It is characterized in that The first connection structure comprises an outer flange (2), and the outer flange (2) protrudes in a direction away from the center of the sinking platform.

3. The bone cement nail according to claim 1, It is characterized in that The second connection structure comprises an inner flange (3), the inner flange (3) protruding towards the center of the sink; a surface of the inner flange (3) facing the center is provided with a threaded section (31), and all the threaded sections (31) on the inner flange (3) form a screw hole, and the screw hole is used for threaded connection with the injection tool; The inlet (4) is located on the inner side of the projection of the screw hole toward the bottom surface of the sink platform.

4. The bone cement nail according to claim 3, It is characterized in that A sealing ring is provided between the projection and the inlet (4).

5. The bone cement nail according to claim 1, It is characterized in that The outlet (1) of the bone cement nail is located between its middle position and the tail end.

6. The bone cement nail according to claim 1, It is characterized in that The outlet (1) of the bone cement nail is located between its middle position and the head end.

7. The bone cement nail according to claim 1, It is characterized in that The outlet (1) of the bone cement nail is arranged in a spiral shape around the axis of the bone cement nail.

8. The bone cement nail according to claim 1, It is characterized in that The number of the outlets (1) of the bone cement nail is at least two, and at least two of the outlets (1) are arranged at intervals along the length direction of the bone cement nail; The bone cement nail comprises a plug (5), and the plug (5) is used to selectively block the outlet (1).

9. The bone cement nail according to claim 8, It is characterized in that The plug (5) is threadedly connected to the outlet (1).

10. A bone setting component, It is characterized in that The invention comprises the bone cement nail as described in any one of claims 1 to 9.

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